CP-Sat solver doesn't optimize objective function #971
Labels
Help Needed
Modeling/Usage problem
Lang: Python
Python wrapper issue
Solver: CP-SAT Solver
Relates to the CP-SAT solver
Milestone
I try to minimize capacity of cumulative constraint for a scheduling problem with around 2 thousand jobs. First solution is found very quickly (in few seconds) but than I see nearly no future progress. When I changed upper limit of capacity variable to lower value, first solution is found again very quickly. For the example it was no problem to find a solution in interval 150 ... 200.
Since described behavior is not good for my needs when sum of capacities over cumulative constraints will be optimized I want to know it is a bug or not yet optimized case for CP-Sat solver so I can decide to implement / not implement my complete scheduling problem.
Thanks,
Jan
example.zip
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