Gurobi 5.0.1 (linux64) logging started Fri Jan 18 08:02:38 2013 Optimize a model with 50800 rows, 125150 columns and 400250 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 1.65s Presolved: 50750 rows, 125100 columns, 350200 nonzeros Variable types: 75100 continuous, 50000 integer (50000 binary) Root relaxation: objective 1.626233e+05, 4119 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 162623.326 0 10 - 162623.326 - - 4s 0 0 162762.078 0 14 - 162762.078 - - 6s 0 0 162764.682 0 14 - 162764.682 - - 6s 0 0 162764.765 0 15 - 162764.765 - - 7s 0 0 162765.023 0 15 - 162765.023 - - 8s 0 0 162765.023 0 15 - 162765.023 - - 10s 0 2 162765.023 0 15 - 162765.023 - - 19s 3 5 162776.856 2 9 - 162770.667 - 248 20s * 31 31 16 167231.88469 162863.281 2.61% 179 24s H 32 10 162938.58404 162863.281 0.05% 173 25s 76 8 162916.782 56 2 162938.584 162863.281 0.05% 74.6 30s 118 8 162917.738 97 2 162938.584 162863.281 0.05% 49.5 35s 164 9 162922.571 138 2 162938.584 162863.281 0.05% 37.8 40s 207 9 162923.559 181 2 162938.584 162863.281 0.05% 33.6 45s 254 9 162923.800 228 2 162938.584 162863.281 0.05% 28.4 50s 310 9 162924.095 283 2 162938.584 162863.281 0.05% 24.3 55s 345 9 162924.293 318 2 162938.584 162863.281 0.05% 22.4 60s 360 9 162924.385 333 2 162938.584 162863.281 0.05% 21.8 65s 408 9 162924.700 381 2 162938.584 162863.281 0.05% 20.0 70s 470 9 162925.150 443 2 162938.584 162863.281 0.05% 18.2 75s 503 9 162925.419 476 4 162938.584 162863.281 0.05% 17.5 80s 560 9 162925.904 533 4 162938.584 162863.281 0.05% 16.6 85s 612 9 162926.419 585 2 162938.584 162863.281 0.05% 16.3 90s 653 9 162926.891 626 2 162938.584 162863.281 0.05% 16.2 95s 692 9 162927.385 665 4 162938.584 162863.281 0.05% 16.1 100s H 693 7 162923.23408 162863.281 0.04% 16.1 102s Cutting planes: Gomory: 7 Implied bound: 58 Flow cover: 4 Explored 716 nodes (16770 simplex iterations) in 103.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.629232340775e+05, best bound 1.629181480236e+05, gap 0.0031%