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```coq
Require Import SMTCoq.SMTCoq.
Goal True.
cvc4.
(* Error:
In nested Ltac calls to "cvc4" and "cvc4_bool", last call failed.
Anomaly
"Uncaught exception Failure("SExprParser: failed to…
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Should the `nat_convert` tactic convert inequalities to boolean equalities that CVC4 understands? I can't find a way to solve this goal.
```coq
Goal forall a b c : nat,
a + b < c ->
b < …
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Hi, for the following formula,
boolector 6fce0ac yields `unsat`,
but both cvc4 and z3 give `sat`
~~~~
(set-logic BV)
(declare-fun _substvar_245_ () Bool)
(assert (not (forall ((q21 Bool) (q22 (_…
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Eldarica says `unsat` for the following example, whereas both z3 and cvc4 say `sat`, so I'm just wondering how Eldarica handles it.
```
(declare-const c Int)
(assert
(and
(= c (div 5 0))
(no…
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Hi, for these formulas, CVC4 reports unknown or hangs on the last formula.
If we change (set-logic ALL) to (set-logic QF_NRA), cvc4 answers sat immediately.
```
[574] % cvc4 small.smt2
sat
sat
…
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This case breaks cvc4 but it takes 2+ hours to verify:
```
#include
unsigned int nondet_uint();
#define MAX_INTEGER 2147483647;
#define GET_MATRIX_SIZE(arr) ((int)(sizeof(arr) / sizeof(arr)[…
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Hey:
While investigating a seemingly unrelated threading bug in CVC4 (possibly related to a variable pointer or reference getting shared between threads--we're hitting a segfault rarely with what a…
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**Coq version:**
The Coq Proof Assistant, version 8.6.1 (October 2018)
compiled on Oct 10 2018 0:46:31 with OCaml 4.03.0
**SMTCoq version:**
commit 44512f412a837866843919c91b9b88ecf4233c3c (curr…
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Hi,
For this formula:
[ite_utilities1280.txt](https://github.com/CVC4/CVC4/files/4304379/ite_utilities1280.txt)
CVC4 incremenal mode throws out a fatal failure:
~~~~
Fatal failure within bool…
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Hi,
For this formula, cvc4-1.7 can report sat while cvc4-1.8 and nightly build report unknown:
```
[563] % cvc4-1.7 -q small.smt2
sat
[564] % cvc4-1.8 -q small.smt2
unknown
[565] % cvc4 -q smal…