Gurobi 5.6.3 (linux64) logging started Tue Oct 7 20:30:41 2014 Optimize a model with 4466 rows, 2257 columns and 11045 nonzeros Presolve removed 47 rows and 0 columns Presolve time: 0.11s Presolved: 4419 rows, 2257 columns, 10998 nonzeros Variable types: 1 continuous, 2256 integer (2256 binary) Found heuristic solution: objective 1.0895837 Found heuristic solution: objective 0.8891735 Found heuristic solution: objective 0.6491918 Root relaxation: objective 9.326343e-03, 2459 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00933 0 1584 0.64919 0.00933 98.6% - 0s H 0 0 0.5827584 0.00933 98.4% - 0s H 0 0 0.5769549 0.00933 98.4% - 0s 0 0 0.01174 0 1275 0.57695 0.01174 98.0% - 0s 0 0 0.02699 0 969 0.57695 0.02699 95.3% - 1s H 0 0 0.5473686 0.02699 95.1% - 1s 0 0 0.03071 0 861 0.54737 0.03071 94.4% - 1s H 0 0 0.5171312 0.03071 94.1% - 1s 0 0 0.04575 0 774 0.51713 0.04575 91.2% - 1s H 0 0 0.5066366 0.04575 91.0% - 1s 0 0 0.04713 0 748 0.50664 0.04713 90.7% - 1s H 0 0 0.4815538 0.04713 90.2% - 1s 0 0 0.05217 0 638 0.48155 0.05217 89.2% - 1s H 0 0 0.4513928 0.05217 88.4% - 2s 0 1 0.05217 0 638 0.45139 0.05217 88.4% - 6s H 1 1 0.4207847 0.05217 87.6% 1151 7s H 3 2 0.3947553 0.18583 52.9% 384 7s H 4 2 0.3581236 0.19044 46.8% 288 8s H 7 4 0.3495506 0.19228 45.0% 164 8s H 7 4 0.3093571 0.19228 37.8% 164 8s * 18 7 20 0.2995629 0.25944 13.4% 454 9s * 39 10 31 0.2986119 0.26251 12.1% 235 9s * 43 7 20 0.2980751 0.26251 11.9% 217 9s * 49 5 22 0.2754410 0.27544 0.00% 193 9s Cutting planes: Gomory: 3 Explored 50 nodes (23891 simplex iterations) in 9.42 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.754410344907e-01, best bound 2.754410344907e-01, gap 0.0%