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jump-dev / Pajarito.jl

A solver for mixed-integer convex optimization
Mozilla Public License 2.0
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cbc warning ignoring partial starting solution #342

Closed chriscoey closed 7 years ago

chriscoey commented 7 years ago

@mlubin I get 

Starting iterative algorithm

Iter. | Best feasible  | Best bound     | Rel. gap    | Time (s)   
    1 |           +Inf |  +3.560000e+03 |         Inf |   1.943e+00

Iter. | Best feasible  | Best bound     | Rel. gap    | Time (s)   
    2 |           +Inf |  +3.560000e+03 |         Inf |   5.226e+00
WARNING: Ignoring partial starting solution. Cbc requires a feasible value to be specified for all variables.

for misocp instances. could that indicate an issue with warm-starts?

mlubin commented 7 years ago

Dunno, which instance?

chriscoey commented 7 years ago

SCIP may have indicated a similar problem here: https://github.com/mlubin/PajaritoSupplement/blob/master/awsoutput/testmisocpone/PAJ_SCIP_ECOS.clay0203h.txt

chriscoey commented 7 years ago

the CBC output from before is here https://github.com/mlubin/PajaritoSupplement/blob/master/awsoutput/testmisocpone/PAJ_CBC_ECOS.clay0203h.txt

mlubin commented 7 years ago

Pajarito is giving cbc the solution:

v = [NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,NaN,120.265,1.99228,79.0954,1.73648,120.267,1.99228,38.6888,1.17902,64.3843,1.98647,77.2873,1.76835,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,120.094,1.99233,93.6292,1.10265,124.373,1.90847,18.5665,1.96739,64.5788,1.98641,84.7394,1.43473,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,120.561,1.99219,75.1465,1.91831,120.644,1.99217,33.2427,1.38811,79.0507,1.98807,72.3143,1.99045,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,120.416,1.99224,90.5101,1.32547,120.551,1.9922,17.4431,1.96871,64.3206,1.98649,71.9688,1.9909,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0]
mlubin commented 7 years ago

Which is correct, because we have no feasible solution to give.