Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:53:36 2013 Optimize a model with 2800 rows, 111000 columns and 292500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.40s Presolved: 2700 rows, 110900 columns, 282400 nonzeros Variable types: 110200 continuous, 700 integer (700 binary) Root relaxation: objective 8.951303e+05, 7157 iterations, 0.58 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 12 - 895130.293 - - 1s 0 0 895170.526 0 12 - 895170.526 - - 1s 0 0 895172.314 0 14 - 895172.314 - - 1s 0 0 895174.955 0 14 - 895174.955 - - 2s 0 0 895174.955 0 14 - 895174.955 - - 2s 0 0 895174.955 0 14 - 895174.955 - - 3s 0 0 895175.006 0 14 - 895175.006 - - 3s 0 0 895175.142 0 14 - 895175.142 - - 3s 0 0 895175.142 0 14 - 895175.142 - - 5s H 0 0 921143.21481 895175.142 2.82% - 6s 0 2 895177.002 0 14 921143.215 895177.002 2.82% - 7s 8 10 895760.379 8 3 921143.215 895526.232 2.78% 112 10s H 27 26 907795.44555 895526.232 1.35% 45.3 14s 29 29 896301.751 29 3 907795.446 895526.232 1.35% 43.7 15s 58 41 897641.317 58 3 907795.446 895526.232 1.35% 32.4 20s * 71 15 71 898078.20513 895526.232 0.28% 31.4 21s 138 56 896212.146 1 9 898078.205 896039.478 0.23% 28.0 25s 188 86 897483.890 9 3 898078.205 896497.825 0.18% 37.2 30s * 195 40 6 897719.60337 896524.633 0.13% 40.5 31s * 206 20 11 896949.94038 896524.633 0.05% 41.5 31s * 229 7 14 896634.43616 896582.089 0.01% 40.6 32s Cutting planes: Flow cover: 16 Explored 230 nodes (18295 simplex iterations) in 32.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.965820890370e+05, gap 0.0058%