Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:16:54 2013 Optimize a model with 3400 rows, 106200 columns and 216100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.59s Presolved: 3200 rows, 105900 columns, 211800 nonzeros Variable types: 104000 continuous, 1900 integer (1900 binary) Root relaxation: objective 9.053666e+05, 9020 iterations, 0.64 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 2 - 905366.638 - - 1s H 0 0 1167852.4821 905366.638 22.5% - 1s 0 0 905392.238 0 2 1167852.48 905392.238 22.5% - 2s 0 0 905423.338 0 2 1167852.48 905423.338 22.5% - 2s H 0 0 910176.25595 905423.338 0.52% - 2s 0 0 905427.143 0 2 910176.256 905427.143 0.52% - 3s 0 0 905438.819 0 2 910176.256 905438.819 0.52% - 3s 0 0 905443.569 0 2 910176.256 905443.569 0.52% - 4s 0 0 905446.574 0 2 910176.256 905446.574 0.52% - 4s 0 0 905450.580 0 2 910176.256 905450.580 0.52% - 5s 0 0 905453.651 0 2 910176.256 905453.651 0.52% - 5s 0 0 905454.713 0 2 910176.256 905454.713 0.52% - 5s 0 0 905456.141 0 2 910176.256 905456.141 0.52% - 5s 0 0 905456.560 0 2 910176.256 905456.560 0.52% - 6s 0 0 905456.560 0 2 910176.256 905456.560 0.52% - 6s 0 2 905461.599 0 2 910176.256 905461.599 0.52% - 7s 13 13 908393.900 12 2 910176.256 905928.835 0.47% 86.2 10s * 16 11 15 908454.96045 905928.835 0.28% 85.2 10s 37 23 907406.687 20 1 908454.960 906396.701 0.23% 119 15s 69 23 908309.957 52 2 908454.960 906396.701 0.23% 100 20s 116 33 908101.370 7 1 908454.960 907017.618 0.16% 96.0 25s * 185 29 22 908281.51610 907261.890 0.11% 77.7 28s 210 27 907995.185 19 1 908281.516 907285.293 0.11% 75.4 30s * 283 42 19 908252.28420 907535.383 0.08% 67.1 33s * 284 30 18 908207.22686 907535.383 0.07% 66.9 33s 297 29 908083.458 8 1 908207.227 907603.024 0.07% 69.5 35s * 309 26 17 908105.81026 907624.685 0.05% 68.7 35s * 342 20 18 908043.18895 907892.458 0.02% 68.5 37s Cutting planes: Flow cover: 41 Explored 373 nodes (34130 simplex iterations) in 38.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080431889462e+05, best bound 9.079629889710e+05, gap 0.0088%