Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:18:44 2013 Optimize a model with 2400 rows, 107100 columns and 233100 nonzeros Presolve removed 100 rows and 2500 columns Presolve time: 0.26s Presolved: 2300 rows, 104600 columns, 229100 nonzeros Variable types: 104100 continuous, 500 integer (500 binary) Root relaxation: objective 8.654105e+05, 6681 iterations, 0.48 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 6 - 865410.545 - - 0s H 0 0 983809.60150 865410.545 12.0% - 1s 0 0 865463.393 0 6 983809.601 865463.393 12.0% - 1s 0 0 865497.571 0 6 983809.601 865497.571 12.0% - 1s 0 0 865511.314 0 6 983809.601 865511.314 12.0% - 1s 0 0 865514.328 0 6 983809.601 865514.328 12.0% - 2s 0 0 865517.008 0 6 983809.601 865517.008 12.0% - 2s 0 0 865523.196 0 6 983809.601 865523.196 12.0% - 2s 0 0 865525.299 0 6 983809.601 865525.299 12.0% - 3s 0 0 865527.850 0 6 983809.601 865527.850 12.0% - 3s 0 0 865530.239 0 6 983809.601 865530.239 12.0% - 3s 0 0 865530.748 0 6 983809.601 865530.748 12.0% - 3s 0 0 865531.525 0 6 983809.601 865531.525 12.0% - 4s 0 0 865531.960 0 6 983809.601 865531.960 12.0% - 4s 0 0 865531.960 0 6 983809.601 865531.960 12.0% - 5s 0 2 865547.130 0 6 983809.601 865547.130 12.0% - 6s 21 23 867106.907 19 3 983809.601 866106.987 12.0% 108 10s H 27 20 868437.48244 866106.987 0.27% 88.5 10s H 54 32 868140.30231 866106.987 0.23% 59.6 13s * 56 32 51 868123.86328 866106.987 0.23% 57.8 13s H 81 40 867695.96650 866353.142 0.15% 65.5 15s * 92 30 33 866849.82663 866353.142 0.06% 58.3 15s Cutting planes: Flow cover: 20 Explored 172 nodes (14895 simplex iterations) in 16.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668498266279e+05, best bound 8.667636987328e+05, gap 0.0099%