Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:57 2013 Optimize a model with 600 rows, 8220 columns and 48560 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.06s Presolved: 580 rows, 8200 columns, 44540 nonzeros Variable types: 8040 continuous, 160 integer (160 binary) Root relaxation: objective 3.860476e+04, 528 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 9 - 38604.7615 - - 0s 0 0 38608.2019 0 9 - 38608.2019 - - 0s 0 0 38608.2264 0 9 - 38608.2264 - - 0s 0 0 38608.2264 0 9 - 38608.2264 - - 0s H 0 0 42019.089250 38608.2264 8.12% - 0s 0 2 38608.2264 0 9 42019.0893 38608.2264 8.12% - 0s * 13 9 13 38861.053975 38829.9079 0.08% 14.1 0s Cutting planes: Flow cover: 3 Explored 31 nodes (975 simplex iterations) in 0.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886105397466e+04, best bound 3.885867293190e+04, gap 0.0061%