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Primal starting value on 7.0.3 #198
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the 4 tests failing are: |
Testing "MIP Start" is always tricky. I think the idea of the test is to
I could guess that an "improvement" in SCIP might have sneaked in a better solution here? |
yes that might be |
So for more details: julia> MOI.optimize!(optimizer)
feasible solution found by completesol heuristic after 0.0 seconds, objective value 1.000000e+00
presolving:
presolving (1 rounds: 1 fast, 1 medium, 1 exhaustive):
2 deleted vars, 1 deleted constraints, 0 added constraints, 2 tightened bounds, 0 added holes, 0 changed sides, 0 changed coefficients
0 implications, 0 cliques
presolved problem has 0 variables (0 bin, 0 int, 0 impl, 0 cont) and 0 constraints
transformed objective value is always integral (scale: 1)
Presolving Time: 0.01
SCIP Status : solving was interrupted [solution limit reached]
Solving Time (sec) : 0.01
Solving Nodes : 0
Primal Bound : +1.00000000000000e+00 (2 solutions)
Dual Bound : +1.00000000000000e+20
Gap : infinite with the new bugfix: julia> MOI.optimize!(optimizer)
feasible solution found by completesol heuristic after 0.0 seconds, objective value 1.000000e+00
presolving:
presolving (1 rounds: 1 fast, 1 medium, 1 exhaustive):
2 deleted vars, 1 deleted constraints, 0 added constraints, 2 tightened bounds, 0 added holes, 0 changed sides, 0 changed coefficients
0 implications, 0 cliques
transformed 1/3 original solutions to the transformed problem space
Presolving Time: 0.02
SCIP Status : problem is solved [optimal solution found]
Solving Time (sec) : 0.02
Solving Nodes : 0
Primal Bound : +2.00000000000000e+00 (3 solutions)
Dual Bound : +2.00000000000000e+00
Gap : 0.00 % |
Solution was to deactivate presolving, which changed some behavior on other constraint handlers, the |
Closed by #195 |
With the SCIP version 7.0.3, once the previous issue is fixed, we have 4 tests failing on primal value setting:
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