Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:45:34 2013 Optimize a model with 2200 rows, 101700 columns and 207600 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.30s Presolved: 2100 rows, 101600 columns, 206500 nonzeros Variable types: 101200 continuous, 400 integer (400 binary) Root relaxation: objective 8.654105e+05, 6394 iterations, 0.57 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 - - 1s H 0 0 928918.38371 865410.545 6.84% - 1s 0 0 865465.850 0 6 928918.384 865465.850 6.83% - 1s 0 0 865507.124 0 6 928918.384 865507.124 6.83% - 1s 0 0 865515.217 0 6 928918.384 865515.217 6.83% - 2s 0 0 865528.254 0 6 928918.384 865528.254 6.82% - 2s 0 0 865530.077 0 6 928918.384 865530.077 6.82% - 2s 0 0 865530.077 0 6 928918.384 865530.077 6.82% - 3s 0 0 865530.077 0 6 928918.384 865530.077 6.82% - 3s 0 0 865530.077 0 6 928918.384 865530.077 6.82% - 4s 0 0 865530.077 0 6 928918.384 865530.077 6.82% - 5s 0 0 865530.077 0 6 928918.384 865530.077 6.82% - 6s 0 2 865580.186 0 6 928918.384 865580.186 6.82% - 7s 4 6 866550.320 3 8 928918.384 866300.143 6.74% 400 10s H 27 20 870078.61139 866300.143 0.43% 83.1 15s H 54 24 869197.83712 866300.143 0.33% 49.1 17s H 82 7 867282.94610 866300.143 0.11% 34.3 20s H 136 56 866989.23532 866544.413 0.05% 28.5 21s H 195 11 866849.82663 866798.427 0.01% 24.6 22s Cutting planes: Flow cover: 11 Explored 195 nodes (14276 simplex iterations) in 22.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668498266279e+05, best bound 8.667984266279e+05, gap 0.0059%