Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:06 2013 Optimize a model with 600 rows, 14440 columns and 96340 nonzeros Presolve removed 20 rows and 2260 columns Presolve time: 0.21s Presolved: 580 rows, 12180 columns, 88340 nonzeros Variable types: 12020 continuous, 160 integer (160 binary) Root relaxation: objective 3.860476e+04, 529 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 15 - 38604.7615 - - 0s 0 0 38608.2019 0 15 - 38608.2019 - - 0s 0 0 38608.2264 0 15 - 38608.2264 - - 0s 0 0 38608.2264 0 15 - 38608.2264 - - 0s H 0 0 43386.117986 38608.2264 11.0% - 1s 0 2 38608.2264 0 15 43386.1180 38608.2264 11.0% - 1s * 13 8 13 38861.053975 38829.9079 0.08% 19.5 1s Cutting planes: Flow cover: 3 Explored 32 nodes (1216 simplex iterations) in 1.47 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886105397466e+04, best bound 3.885937005561e+04, gap 0.0043%