Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:29:18 2013 Optimize a model with 2400 rows, 103200 columns and 208100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.88s Presolved: 2200 rows, 102900 columns, 205800 nonzeros Variable types: 102000 continuous, 900 integer (900 binary) Root relaxation: objective 8.951303e+05, 8672 iterations, 1.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 4 - 895130.293 - - 2s H 0 0 1022485.5503 895130.293 12.5% - 3s H 0 0 900789.75719 895130.293 0.63% - 3s 0 0 895191.950 0 4 900789.757 895191.950 0.62% - 3s 0 0 895215.672 0 4 900789.757 895215.672 0.62% - 4s 0 0 895237.083 0 4 900789.757 895237.083 0.62% - 5s 0 0 895245.750 0 4 900789.757 895245.750 0.62% - 5s 0 0 895247.943 0 4 900789.757 895247.943 0.62% - 5s 0 0 895252.344 0 4 900789.757 895252.344 0.61% - 6s 0 0 895256.080 0 4 900789.757 895256.080 0.61% - 6s 0 0 895256.598 0 4 900789.757 895256.598 0.61% - 6s 0 0 895259.257 0 4 900789.757 895259.257 0.61% - 7s 0 0 895260.753 0 4 900789.757 895260.753 0.61% - 7s 0 0 895261.277 0 4 900789.757 895261.277 0.61% - 8s 0 0 895261.277 0 4 900789.757 895261.277 0.61% - 8s 0 0 895261.368 0 4 900789.757 895261.368 0.61% - 8s 0 0 895261.462 0 4 900789.757 895261.462 0.61% - 9s 0 0 895261.462 0 4 900789.757 895261.462 0.61% - 10s 0 2 895263.093 0 4 900789.757 895263.093 0.61% - 11s 19 15 895787.122 19 1 900789.757 895787.122 0.56% 56.2 15s H 27 7 898252.98116 895851.743 0.27% 46.0 16s 52 10 896161.206 52 1 898252.981 895995.784 0.25% 37.4 20s 97 12 896638.728 97 1 898252.981 895995.784 0.25% 31.1 25s 151 13 897418.497 151 1 898252.981 895995.784 0.25% 28.2 30s 208 14 896276.954 1 3 898252.981 896276.954 0.22% 27.9 35s 261 34 897552.928 53 1 898252.981 896469.884 0.20% 32.9 40s * 311 7 19 896949.94038 896545.815 0.05% 34.6 43s * 318 4 16 896634.43616 896613.796 0.00% 35.6 44s Cutting planes: Flow cover: 25 Explored 319 nodes (20751 simplex iterations) in 44.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.966137959975e+05, gap 0.0023%