Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:31:07 2013 Optimize a model with 1500 rows, 51100 columns and 270850 nonzeros Presolve removed 50 rows and 5650 columns Presolve time: 0.41s Presolved: 1450 rows, 45450 columns, 250850 nonzeros Variable types: 45050 continuous, 400 integer (400 binary) Root relaxation: objective 1.749223e+05, 2187 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 174922.321 0 10 - 174922.321 - - 0s 0 0 174926.815 0 10 - 174926.815 - - 0s 0 0 174927.765 0 10 - 174927.765 - - 0s 0 0 174928.203 0 10 - 174928.203 - - 1s 0 0 174928.358 0 10 - 174928.358 - - 1s 0 0 174928.426 0 10 - 174928.426 - - 1s 0 0 174928.654 0 10 - 174928.654 - - 1s 0 0 174928.654 0 10 - 174928.654 - - 1s 0 0 174928.654 0 10 - 174928.654 - - 1s 0 0 174928.654 0 10 - 174928.654 - - 2s 0 2 174932.142 0 10 - 174932.142 - - 4s 13 15 175099.467 13 8 - 174957.319 - 31.7 5s * 120 114 120 176757.65706 174957.319 1.02% 9.3 6s * 252 157 42 176277.94093 175069.055 0.69% 12.4 8s 408 181 176022.465 13 10 176277.941 175311.024 0.55% 16.7 10s * 576 247 37 176271.63683 175476.898 0.45% 16.2 11s * 821 157 25 176210.45151 175863.548 0.20% 16.1 14s 885 136 176037.195 15 10 176210.452 175915.137 0.17% 16.1 15s Cutting planes: Flow cover: 6 Explored 1133 nodes (20422 simplex iterations) in 18.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.762104515062e+05, best bound 1.761938965051e+05, gap 0.0094%