Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:38:48 2013 Optimize a model with 2600 rows, 105900 columns and 242200 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.31s Presolved: 2500 rows, 105800 columns, 237100 nonzeros Variable types: 105200 continuous, 600 integer (600 binary) Root relaxation: objective 8.951303e+05, 7220 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 895186.364 0 12 - 895186.364 - - 1s 0 0 895196.520 0 12 - 895196.520 - - 1s 0 0 895197.733 0 13 - 895197.733 - - 2s 0 0 895197.733 0 13 - 895197.733 - - 2s 0 0 895199.899 0 13 - 895199.899 - - 2s 0 0 895199.903 0 13 - 895199.903 - - 2s 0 0 895199.903 0 13 - 895199.903 - - 3s 0 0 895199.903 0 13 - 895199.903 - - 3s 0 0 895199.903 0 13 - 895199.903 - - 3s 0 0 895199.903 0 13 - 895199.903 - - 5s H 0 0 911910.80873 895199.903 1.83% - 5s 0 2 895205.474 0 13 911910.809 895205.474 1.83% - 5s 16 18 895996.472 16 1 911910.809 895526.232 1.80% 59.4 10s H 27 16 903350.61812 895526.232 0.87% 40.6 11s 58 26 897641.317 58 3 903350.618 895526.232 0.87% 29.4 15s * 73 17 73 898078.20513 895526.232 0.28% 26.1 16s 156 61 896582.089 3 3 898078.205 896471.884 0.18% 27.0 20s 323 182 898027.505 129 1 898078.205 896546.546 0.17% 19.9 25s H 352 60 897166.44604 896560.400 0.07% 19.9 26s * 384 66 51 897159.25289 896560.400 0.07% 19.2 27s * 396 33 12 896949.94038 896582.089 0.04% 20.2 28s * 405 1 13 896634.43616 896634.324 0.00% 19.9 28s Cutting planes: Flow cover: 15 Explored 406 nodes (17613 simplex iterations) in 28.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.966344361626e+05, best bound 8.966343243635e+05, gap 0.0000%