[Couenne] Runnig time

[njamett at uantof.cl]

Hi

I'm working on a MINLP problem and solving it with Couenne.

Sometimes it get stuck trying to get an optimum always at the same time (256 seconds).

Cbc0010I After 81300 nodes, 30318 on tree, -1.12361e+11 best solution, best possible -2.45689e+11 (256.52 seconds)
Cbc0010I After 81400 nodes, 30353 on tree, -1.12361e+11 best solution, best possible -2.45689e+11 (256.52 seconds)
Cbc0010I After 81500 nodes, 30393 on tree, -1.12361e+11 best solution, best possible -2.45689e+11 (256.52 seconds)
Cbc0010I After 81600 nodes, 30429 on tree, -1.12361e+11 best solution, best possible -2.45689e+11 (256.52 seconds)

What's these mean? Is it a formulation problem? Or a PC capacity problem?

Thank you

Best regards

Nathalie Jamett
PhD Student
University of Antofagasta
Chile
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