Gurobi 5.0.1 (linux64) logging started Mon Feb 4 20:30:46 2013 Optimize a model with 682800 rows, 25600 columns and 2060800 nonzeros Presolve removed 22054 rows and 12875 columns (presolve time = 6s) ... Presolve removed 31476 rows and 12936 columns (presolve time = 11s) ... Presolve removed 31476 rows and 12936 columns Presolve time: 11.25s Presolved: 651324 rows, 12664 columns, 1964017 nonzeros Variable types: 64 continuous, 12600 integer (12600 binary) Found heuristic solution: objective 577820.00000 Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8449 3.8210816e+05 0.000000e+00 1.816745e+09 6s 16898 3.8335251e+05 0.000000e+00 6.617380e+08 11s 24140 3.8486992e+05 0.000000e+00 2.356368e+09 16s 32589 3.8683883e+05 0.000000e+00 5.281284e+08 20s 41038 3.8759172e+05 0.000000e+00 3.738910e+09 25s 49487 3.9076928e+05 0.000000e+00 3.584489e+09 30s 59143 3.9427149e+05 0.000000e+00 2.514667e+09 36s 66385 3.9574087e+05 0.000000e+00 3.515904e+08 40s 72420 3.9784759e+05 0.000000e+00 1.093674e+09 45s 80869 4.0162130e+05 0.000000e+00 2.801425e+08 50s 92939 4.0592765e+05 0.000000e+00 4.218900e+09 55s 108630 4.1372698e+05 0.000000e+00 9.651577e+07 60s 123114 4.2140184e+05 0.000000e+00 3.060131e+08 65s 136391 4.2873177e+05 0.000000e+00 1.789003e+08 70s 150875 4.3587702e+05 0.000000e+00 1.313101e+07 75s 164162 4.4470099e+05 0.000000e+00 1.210961e+06 80s 168990 4.4677692e+05 0.000000e+00 1.498793e+01 86s 169004 4.4675904e+05 0.000000e+00 0.000000e+00 87s 169004 4.4675904e+05 0.000000e+00 0.000000e+00 87s Root relaxation: objective 4.467590e+05, 169004 iterations, 86.68 seconds Total elapsed time = 100.15s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 446759.039 0 18 577820.000 446759.039 22.7% - 102s H 0 0 446775.00000 446759.039 0.00% - 102s Explored 0 nodes (169371 simplex iterations) in 102.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.467750000000e+05, best bound 4.467590389610e+05, gap 0.0036%