Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:08:19 2013 Optimize a model with 73226 rows, 5776 columns and 222376 nonzeros Presolve removed 7941 rows and 2967 columns Presolve time: 0.64s Presolved: 65285 rows, 2809 columns, 198037 nonzeros Variable types: 30 continuous, 2779 integer (2779 binary) Found heuristic solution: objective 115994.00000 Root relaxation: objective 8.761248e+04, 9470 iterations, 1.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 87612.4830 0 9 115994.000 87612.4830 24.5% - 1s H 0 0 87623.000000 87612.4830 0.01% - 1s 0 0 87614.4245 0 16 87623.0000 87614.4245 0.01% - 2s Cutting planes: Gomory: 5 MIR: 8 Zero half: 3 Explored 0 nodes (9583 simplex iterations) in 2.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.762300000000e+04, best bound 8.761500000000e+04, gap 0.0091%