Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:08:23 2013 Optimize a model with 73226 rows, 5776 columns and 222376 nonzeros Presolve removed 5274 rows and 2922 columns Presolve time: 0.56s Presolved: 67952 rows, 2854 columns, 206557 nonzeros Variable types: 37 continuous, 2817 integer (2817 binary) Found heuristic solution: objective 129798.00000 Root relaxation: objective 9.006300e+04, 22711 iterations, 2.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 90063.0000 0 9 129798.000 90063.0000 30.6% - 3s H 0 0 90089.000000 90063.0000 0.03% - 3s H 0 0 90079.000000 90063.0000 0.02% - 3s H 0 0 90071.000000 90063.0000 0.01% - 3s Explored 0 nodes (22888 simplex iterations) in 3.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.007100000000e+04, best bound 9.006300000000e+04, gap 0.0089%