Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:54:03 2013 Optimize a model with 17343 rows, 2209 columns and 53016 nonzeros Presolve removed 3861 rows and 1181 columns Presolve time: 0.12s Presolved: 13482 rows, 1028 columns, 41016 nonzeros Variable types: 13 continuous, 1015 integer (1015 binary) Found heuristic solution: objective 46003.000000 Root relaxation: objective 3.762478e+04, 2615 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37624.7778 0 4 46003.0000 37624.7778 18.2% - 0s H 0 0 37631.000000 37624.7778 0.02% - 0s H 0 0 37629.000000 37624.7778 0.01% - 0s 0 0 37625.8217 0 9 37629.0000 37625.8217 0.01% - 0s Cutting planes: Gomory: 4 MIR: 3 Explored 0 nodes (2659 simplex iterations) in 0.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.762900000000e+04, best bound 3.762600000000e+04, gap 0.0080%