Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:38:21 2013 Optimize a model with 2600 rows, 102300 columns and 207500 nonzeros Presolve removed 200 rows and 200 columns Presolve time: 0.45s Presolved: 2400 rows, 102100 columns, 206800 nonzeros Variable types: 101200 continuous, 900 integer (900 binary) Root relaxation: objective 8.654105e+05, 5827 iterations, 0.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 2 - 865410.545 - - 1s H 0 0 928918.38371 865410.545 6.84% - 1s 0 0 865464.797 0 2 928918.384 865464.797 6.83% - 1s 0 0 865505.759 0 2 928918.384 865505.759 6.83% - 1s 0 0 865513.867 0 2 928918.384 865513.867 6.83% - 1s 0 0 865525.044 0 2 928918.384 865525.044 6.82% - 2s 0 0 865528.185 0 2 928918.384 865528.185 6.82% - 2s 0 0 865528.185 0 2 928918.384 865528.185 6.82% - 2s 0 0 865530.353 0 2 928918.384 865530.353 6.82% - 3s 0 0 865532.851 0 1 928918.384 865532.851 6.82% - 3s 0 0 865534.839 0 1 928918.384 865534.839 6.82% - 3s 0 0 865535.612 0 1 928918.384 865535.612 6.82% - 3s 0 0 865535.885 0 1 928918.384 865535.885 6.82% - 4s 0 0 865536.234 0 1 928918.384 865536.234 6.82% - 4s 0 0 865536.234 0 1 928918.384 865536.234 6.82% - 4s 0 2 865546.127 0 1 928918.384 865546.127 6.82% - 5s H 27 15 868425.35667 866550.441 0.22% 117 9s 38 18 867406.682 36 1 868425.357 866550.441 0.22% 94.6 10s H 54 19 868134.99315 866550.441 0.18% 76.0 11s 87 23 867161.745 6 1 868134.993 866564.739 0.18% 68.0 15s * 88 8 7 867215.13488 866564.739 0.07% 68.0 15s * 184 81 93 866849.82663 866619.058 0.03% 39.4 17s Cutting planes: Flow cover: 17 Explored 232 nodes (14634 simplex iterations) in 18.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668498266279e+05, best bound 8.667637020346e+05, gap 0.0099%