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probcomp / Venturecxx

Primary implementation of the Venture probabilistic programming system
http://probcomp.csail.mit.edu/venture/
GNU General Public License v3.0
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Several assertion and None errors in minimal CrossCat implementation #598

Closed marcoct closed 8 years ago

marcoct commented 8 years ago

When running single site Gibbs sampling in the the barebones CrossCat implementation below, several distinct but seemingly related Python error messages are stochastically generated. A minimal example that reproduces the bug is in the file gibbs_bug_minimal_example.vnts shown below:

// gibbs_bug_minimal_example.vnts

define num_rows = 2;
define num_features = 2;

// the component model (does not get a tag)
assume component_model = mem((col, category) ~> {
    make_beta_bernoulli(0.1, 0.1) });

// the CRP over views (does not get a tag)
assume view_crp ~ make_crp(1.0); // alpha = 1.0

// the view draws from the CRP for each column
assume view = mem((col) ~> { tag("view", col, view_crp()) });

// the CRP over cluster assignments within each view (does not get a tag)
assume categorization_crp = mem((view) ~> { make_crp(1.0) }); // alpha = 1.0

// the assignments of cells to clusters (each view, row is in its own block)
assume category = mem((view, row) ~> {
    tag("cluster", pair(view, row), categorization_crp(view)()) });

// the observed value (does not get a tag)
assume cell = mem((row, col) ~> {
    component_model(col, category(view(col), row))() });

// observe some data
observe cell(integer(0), integer(0)) = false;
observe cell(integer(0), integer(1)) = false;
observe cell(integer(1), integer(0)) = false;
observe cell(integer(1), integer(1)) = false;

infer action(print("running MH..."));
infer repeat(100, {
    mh(default, one, 1)
});

infer action(print("running Gibbs..."));
infer repeat(100, {
    gibbs(default, one, 1)
});

To run:

venture -f gibbs_bug_minimal_example.vnts

This generates the following errors stochastically on different runs:

Error A

Marcos-MacBook-Pro-2:crosscat marco$ venture -f gibbs_bug_minimal_example.vnts 
Tracing models with the Lite backend
Strng(running MH...)
Strng(running Gibbs...)
Warning: skipping annotating did 21, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Traceback (most recent call last):
  File "/usr/local/bin/venture", line 184, in <module>
    lite(args)
  File "/usr/local/bin/venture", line 57, in lite
    local_ripl(args, v.Lite())
  File "/usr/local/bin/venture", line 61, in local_ripl
    (interactive, r, files, plugins) = build()
  File "/usr/local/bin/venture", line 91, in build
    r.execute_program_from_file(f)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 297, in execute_program_from_file
    self.execute_program(f.read())
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 273, in execute_program
    res = self.execute_parsed_program(*self.parse_program(program_string))
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 285, in execute_parsed_program
    vals.append(self.execute_instruction(instruction))
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 174, in execute_instruction
    self._raise_annotated(e, instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 170, in execute_instruction
    stringable_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 185, in _execute_parsed_instruction
    ans = self.sivm.execute_instruction(parsed_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/venture_sivm.py", line 93, in execute_instruction
    response = self._call_core_sivm_instruction(instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/venture_sivm.py", line 183, in _call_core_sivm_instruction
    response = self.core_sivm.execute_instruction(desugared_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/core_sivm.py", line 63, in execute_instruction
    return f(instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/core_sivm.py", line 202, in _do_infer
    (did, val) = self.engine.infer(e)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 284, in infer
    return self.raw_evaluate([v.sym("run"), program])
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 217, in raw_evaluate
    did = self._do_raw_evaluate(program)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 225, in _do_raw_evaluate
    self.infer_trace.eval(did, program)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/trace.py", line 62, in eval
    val = evaluator.eval(addr.Address(addr.List(id)), py_exp, self.env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 84, in apply
    return applyPSP(spr.sp.outputPSP, OutputArgs(address, nodes[1:], env, rng.randint(1, 2**31 - 1), req_nodes, requests))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 121, in applyPSP
    val = psp.simulate(args)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/psp.py", line 489, in simulate
    self.psp.simulate(self.f_type.unwrap_args(args)))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/inference_sps.py", line 85, in simulate
    ans = engine.primitive_infer(self.exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/inference.py", line 122, in primitive_infer
    def primitive_infer(self, exp): return self.engine.primitive_infer(exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 317, in primitive_infer
    def primitive_infer(self, exp): return self.model.primitive_infer(exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/trace_set.py", line 340, in primitive_infer
    return self.traces.map('primitive_infer', exp)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 203, in map
    return self.handle_result_list(res)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 236, in handle_result_list
    raise exception_handler.gen_exception()
venture.exception.VentureException: *** evaluation: Cannot apply a non-procedure: None (at node <venture.lite.node.RequestNode object at 0x10eb59d90> with operator <venture.lite.node.LookupNode object at 0x10eb59b10>)
**************************************************
Stack trace from worker:
**************************************************
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 104, in wrapped
    res = f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 342, in <lambda>
    return safely(lambda *args,**kwargs: getattr(self.obj, attrname)(*args, **kwargs))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 546, in primitive_infer
    infer.EnumerativeGibbsOperator())
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/mh.py", line 75, in mixMH
    proposedTrace, logAlpha = operator.propose(trace, index)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 86, in propose
    (xiParticles, xiWeights) = self.compute_particles(trace, scaffold)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 78, in compute_particles
    regenAndAttach(xiParticle, scaffold, shouldRestore, omegaDB, OrderedDict()))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 42, in regenAndAttach
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 55, in regenAndAttachAtBorder
    weight += regen(trace, node, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 123, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 123, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 147, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 291, in evalRequests
    weight += restore(trace, esrParent, scaffold, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 336, in restore
    True, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 230, in apply
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 291, in evalRequests
    weight += restore(trace, esrParent, scaffold, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 336, in restore
    True, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 228, in apply
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 277, in applyPSP
    maybeRegisterRandomChoiceInScope(trace, node)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 341, in maybeRegisterRandomChoiceInScope
    psp = trace.pspAt(node)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 241, in pspAt
    def pspAt(self, node): return node.relevantPSP(self.spAt(node))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 235, in spAt
    def spAt(self, node): return self.madeSPAt(self.spRefAt(node).makerNode)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 231, in spRefAt
    raise infer.NoSPRefError("Cannot apply a non-procedure: %s (at node %s with operator %s)" % (candidate, node, node.operatorNode))
NoSPRefError: Cannot apply a non-procedure: None (at node <venture.lite.node.RequestNode object at 0x10eb59d90> with operator <venture.lite.node.LookupNode object at 0x10eb59b10>)

(run (repeat 100 (gibbs default one 1)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Caused by
Cannot apply a non-procedure: None (at node <venture.lite.node.RequestNode object at 0x10eb59d90> with operator <venture.lite.node.LookupNode object at 0x10eb59b10>)
**************************************************
Stack trace from worker:
**************************************************
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 104, in wrapped
    res = f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 342, in <lambda>
    return safely(lambda *args,**kwargs: getattr(self.obj, attrname)(*args, **kwargs))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 546, in primitive_infer
    infer.EnumerativeGibbsOperator())
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/mh.py", line 75, in mixMH
    proposedTrace, logAlpha = operator.propose(trace, index)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 86, in propose
    (xiParticles, xiWeights) = self.compute_particles(trace, scaffold)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 78, in compute_particles
    regenAndAttach(xiParticle, scaffold, shouldRestore, omegaDB, OrderedDict()))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 42, in regenAndAttach
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 55, in regenAndAttachAtBorder
    weight += regen(trace, node, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 123, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 123, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 147, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 291, in evalRequests
    weight += restore(trace, esrParent, scaffold, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 336, in restore
    True, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 230, in apply
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 291, in evalRequests
    weight += restore(trace, esrParent, scaffold, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 336, in restore
    True, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 228, in apply
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 277, in applyPSP
    maybeRegisterRandomChoiceInScope(trace, node)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 341, in maybeRegisterRandomChoiceInScope
    psp = trace.pspAt(node)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 241, in pspAt
    def pspAt(self, node): return node.relevantPSP(self.spAt(node))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 235, in spAt
    def spAt(self, node): return self.madeSPAt(self.spRefAt(node).makerNode)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 231, in spRefAt
    raise infer.NoSPRefError("Cannot apply a non-procedure: %s (at node %s with operator %s)" % (candidate, node, node.operatorNode))
NoSPRefError: Cannot apply a non-procedure: None (at node <venture.lite.node.RequestNode object at 0x10eb59d90> with operator <venture.lite.node.LookupNode object at 0x10eb59b10>)

Error B

Marcos-MacBook-Pro-2:crosscat marco$ venture -f gibbs_bug_minimal_example.vnts 
Tracing models with the Lite backend
Strng(running MH...)
Strng(running Gibbs...)
Warning: skipping annotating did 21, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Warning: skipping annotating did 11, assumed to be from the inference prelude
Traceback (most recent call last):
  File "/usr/local/bin/venture", line 184, in <module>
    lite(args)
  File "/usr/local/bin/venture", line 57, in lite
    local_ripl(args, v.Lite())
  File "/usr/local/bin/venture", line 61, in local_ripl
    (interactive, r, files, plugins) = build()
  File "/usr/local/bin/venture", line 91, in build
    r.execute_program_from_file(f)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 297, in execute_program_from_file
    self.execute_program(f.read())
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 273, in execute_program
    res = self.execute_parsed_program(*self.parse_program(program_string))
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 285, in execute_parsed_program
    vals.append(self.execute_instruction(instruction))
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 174, in execute_instruction
    self._raise_annotated(e, instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 170, in execute_instruction
    stringable_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 185, in _execute_parsed_instruction
    ans = self.sivm.execute_instruction(parsed_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/venture_sivm.py", line 93, in execute_instruction
    response = self._call_core_sivm_instruction(instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/venture_sivm.py", line 183, in _call_core_sivm_instruction
    response = self.core_sivm.execute_instruction(desugared_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/core_sivm.py", line 63, in execute_instruction
    return f(instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/core_sivm.py", line 202, in _do_infer
    (did, val) = self.engine.infer(e)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 284, in infer
    return self.raw_evaluate([v.sym("run"), program])
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 217, in raw_evaluate
    did = self._do_raw_evaluate(program)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 225, in _do_raw_evaluate
    self.infer_trace.eval(did, program)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/trace.py", line 62, in eval
    val = evaluator.eval(addr.Address(addr.List(id)), py_exp, self.env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 84, in apply
    return applyPSP(spr.sp.outputPSP, OutputArgs(address, nodes[1:], env, rng.randint(1, 2**31 - 1), req_nodes, requests))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 121, in applyPSP
    val = psp.simulate(args)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/psp.py", line 489, in simulate
    self.psp.simulate(self.f_type.unwrap_args(args)))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/inference_sps.py", line 85, in simulate
    ans = engine.primitive_infer(self.exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/inference.py", line 122, in primitive_infer
    def primitive_infer(self, exp): return self.engine.primitive_infer(exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 317, in primitive_infer
    def primitive_infer(self, exp): return self.model.primitive_infer(exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/trace_set.py", line 340, in primitive_infer
    return self.traces.map('primitive_infer', exp)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 203, in map
    return self.handle_result_list(res)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 236, in handle_result_list
    raise exception_handler.gen_exception()
venture.exception.VentureException: *** evaluation: 
**************************************************
Stack trace from worker:
**************************************************
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 104, in wrapped
    res = f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 342, in <lambda>
    return safely(lambda *args,**kwargs: getattr(self.obj, attrname)(*args, **kwargs))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 546, in primitive_infer
    infer.EnumerativeGibbsOperator())
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/mh.py", line 88, in mixMH
    ans = operator.accept() # May mutate trace
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 100, in accept
    self.finalParticle.commit()
  File "/usr/local/lib/python2.7/site-packages/venture/lite/particle.py", line 314, in commit
    self.base.setMadeSPAuxAt(node, spaux)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 271, in setMadeSPAuxAt
    spRecord = self.madeSPRecordAt(node)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 253, in madeSPRecordAt
    assert node.madeSPRecord is not None
AssertionError

(run (repeat 100 (gibbs default one 1)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Caused by

**************************************************
Stack trace from worker:
**************************************************
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 104, in wrapped
    res = f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 342, in <lambda>
    return safely(lambda *args,**kwargs: getattr(self.obj, attrname)(*args, **kwargs))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 546, in primitive_infer
    infer.EnumerativeGibbsOperator())
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/mh.py", line 88, in mixMH
    ans = operator.accept() # May mutate trace
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 100, in accept
    self.finalParticle.commit()
  File "/usr/local/lib/python2.7/site-packages/venture/lite/particle.py", line 314, in commit
    self.base.setMadeSPAuxAt(node, spaux)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 271, in setMadeSPAuxAt
    spRecord = self.madeSPRecordAt(node)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 253, in madeSPRecordAt
    assert node.madeSPRecord is not None
AssertionError
marcoct commented 8 years ago

Another related error is thrown by a related program (simulate_data.py) running similar inference in the same model. The simulate_data.py script that generates this error involves a number of VentureScript source files not included here, but perhaps the error message will still be useful.

Marcos-MacBook-Pro-2:crosscat marco$ python simulate_data.py 
./../../core.py:1: RuntimeWarning: Parent module '../.' not found while handling absolute import
  import random
./../../core.py:2: RuntimeWarning: Parent module '../.' not found while handling absolute import
  import string
./../../core.py:3: RuntimeWarning: Parent module '../.' not found while handling absolute import
  import numpy as np
./../../core.py:4: RuntimeWarning: Parent module '../.' not found while handling absolute import
  import time
./../../core.py:6: RuntimeWarning: Parent module '../.' not found while handling absolute import
  import venture.shortcuts as vs
./../../core.py:7: RuntimeWarning: Parent module '../.' not found while handling absolute import
  from venture.ripl.utils import strip_types
./../../core.py:8: RuntimeWarning: Parent module '../.' not found while handling absolute import
  import venture.value.dicts as v
./../../core.py:9: RuntimeWarning: Parent module '../.' not found while handling absolute import
  from venture.lite import types as t
./../../core.py:10: RuntimeWarning: Parent module '../.' not found while handling absolute import
  from venture.lite.sp_help import typed_nr, deterministic_typed
VentureList([Bool(True), Bool(True), Bool(True), Bool(False)])
prevcol 0
prevcol 1
Strng(inference_operator)
VentureInteger(0)
Strng(inference_operator)
VentureInteger(1)
Strng(inference_operator)
VentureInteger(2)
Traceback (most recent call last):
  File "simulate_data.py", line 106, in <module>
    run_inference_and_render("make_gibbs_inference_program(1)")
  File "simulate_data.py", line 98, in run_inference_and_render
    latents = dict(ripl.evaluate("run_inference_and_extract(%s)" % inference_prog))
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 718, in evaluate
    'expression': program})
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 174, in execute_instruction
    self._raise_annotated(e, instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 170, in execute_instruction
    stringable_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/ripl/ripl.py", line 185, in _execute_parsed_instruction
    ans = self.sivm.execute_instruction(parsed_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/venture_sivm.py", line 93, in execute_instruction
    response = self._call_core_sivm_instruction(instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/venture_sivm.py", line 183, in _call_core_sivm_instruction
    response = self.core_sivm.execute_instruction(desugared_instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/core_sivm.py", line 63, in execute_instruction
    return f(instruction)
  File "/usr/local/lib/python2.7/site-packages/venture/sivm/core_sivm.py", line 196, in _do_evaluate
    (did, val) = self.engine.evaluate(e)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 213, in evaluate
    return self.raw_evaluate([v.sym("autorun"), program])
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 217, in raw_evaluate
    did = self._do_raw_evaluate(program)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 225, in _do_raw_evaluate
    self.infer_trace.eval(did, program)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/trace.py", line 62, in eval
    val = evaluator.eval(addr.Address(addr.List(id)), py_exp, self.env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 84, in apply
    return applyPSP(spr.sp.outputPSP, OutputArgs(address, nodes[1:], env, rng.randint(1, 2**31 - 1), req_nodes, requests))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 121, in applyPSP
    val = psp.simulate(args)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/psp.py", line 489, in simulate
    self.psp.simulate(self.f_type.unwrap_args(args)))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/inference_sps.py", line 95, in simulate
    ans = getattr(engine, self.name)(*self.operands)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/inference.py", line 248, in in_model
    return self.engine.in_model(model, action)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 237, in in_model
    did = self._do_raw_evaluate(program)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 225, in _do_raw_evaluate
    self.infer_trace.eval(did, program)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/trace.py", line 62, in eval
    val = evaluator.eval(addr.Address(addr.List(id)), py_exp, self.env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 54, in eval
    v = eval(addr,subexp,env,rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 82, in apply
    req_nodes = [evalRequest(req_args, spr, r, rng) for r in requests.esrs]
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 131, in evalRequest
    ans = node.Node(new_addr, eval(new_addr, r.exp, r.env, rng))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 58, in eval
    val = apply(address, nodes, env, rng)
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 84, in apply
    return applyPSP(spr.sp.outputPSP, OutputArgs(address, nodes[1:], env, rng.randint(1, 2**31 - 1), req_nodes, requests))
  File "/usr/local/lib/python2.7/site-packages/venture/untraced/evaluator.py", line 121, in applyPSP
    val = psp.simulate(args)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/psp.py", line 489, in simulate
    self.psp.simulate(self.f_type.unwrap_args(args)))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/inference_sps.py", line 85, in simulate
    ans = engine.primitive_infer(self.exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/inference.py", line 122, in primitive_infer
    def primitive_infer(self, exp): return self.engine.primitive_infer(exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/engine.py", line 317, in primitive_infer
    def primitive_infer(self, exp): return self.model.primitive_infer(exp)
  File "/usr/local/lib/python2.7/site-packages/venture/engine/trace_set.py", line 340, in primitive_infer
    return self.traces.map('primitive_infer', exp)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 203, in map
    return self.handle_result_list(res)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 236, in handle_result_list
    raise exception_handler.gen_exception()
venture.exception.VentureException: *** evaluation: 'NoneType' object has no attribute 'esrs'
(cell (quote integer<0>) (quote integer<0>))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(mem (make_csp (quote (row col)) (quote ((component_model col (category (view col) row))))))
                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^
**************************************************
Stack trace from worker:
**************************************************
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 104, in wrapped
    res = f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/venture/multiprocess.py", line 342, in <lambda>
    return safely(lambda *args,**kwargs: getattr(self.obj, attrname)(*args, **kwargs))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/trace.py", line 546, in primitive_infer
    infer.EnumerativeGibbsOperator())
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/mh.py", line 75, in mixMH
    proposedTrace, logAlpha = operator.propose(trace, index)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 86, in propose
    (xiParticles, xiWeights) = self.compute_particles(trace, scaffold)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/infer/egibbs.py", line 78, in compute_particles
    regenAndAttach(xiParticle, scaffold, shouldRestore, omegaDB, OrderedDict()))
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 42, in regenAndAttach
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 55, in regenAndAttachAtBorder
    weight += regen(trace, node, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 123, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 123, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 139, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 121, in regenParents
    weight += regen(trace, parent, scaffold, shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 147, in regen
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 295, in evalRequests
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 204, in evalFamily
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 230, in apply
    shouldRestore, omegaDB, gradients)
  File "/usr/local/lib/python2.7/site-packages/venture/lite/regen.py", line 287, in evalRequests
    for esr in request.esrs:
VentureException: *** evaluation: 'NoneType' object has no attribute 'esrs'
{'cause': AttributeError("'NoneType' object has no attribute 'esrs'",), 'address': [[95], [[]], [94, 1, 2, 1, 0, 2], [[]]]}
Caused by
'NoneType' object has no attribute 'esrs'

Caused by
'NoneType' object has no attribute 'esrs'
marcoct commented 8 years ago

This is blocking the following: https://github.com/probcomp/measurement/issues/18

marcoct commented 8 years ago

Related to and possible duplicate of https://github.com/probcomp/Venturecxx/issues/590

marcoct commented 8 years ago

The errors do not occur when Gibbs is only used or the "cluster" scope and MH is used for the "view" scope. It's possible that this is because Gibbs is undefined for changes to the view of a column, due to the need to propose somehow new values for the cluster assignments within each potential view---is there a way to express this notion more clearly in the error messages?

lenaqr commented 8 years ago

I think the crash is an actual bug. The expected behavior in that case is that it samples the new cluster variables from the prior, once per possible value of the view variable.

axch commented 8 years ago

The "related error" definitely looks like an instance of #590. I think that one will be the first bug I attack after completing the draft of subproblem selection.

axch commented 8 years ago

For what it's worth, Puma runs this program to completion (on 6 initial seeds out of 6 attempted).

axch commented 8 years ago

I think that as of commit 5693560, this issue is fixed. Even if the simulate_data.py crash persists, I think that's an instance of #590, which leaves the added issue that this ticket is about resolved. Reopen if there is still a problem.