Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:52:32 2013 Optimize a model with 11521 rows, 1681 columns and 35301 nonzeros Presolve removed 1814 rows and 870 columns Presolve time: 0.08s Presolved: 9707 rows, 811 columns, 29801 nonzeros Variable types: 18 continuous, 793 integer (793 binary) Found heuristic solution: objective 30505.000000 Root relaxation: objective 2.245816e+04, 3229 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 22458.1611 0 11 30505.0000 22458.1611 26.4% - 0s H 0 0 22485.000000 22458.1611 0.12% - 0s H 0 0 22470.000000 22458.1611 0.05% - 0s H 0 0 22468.000000 22458.1611 0.04% - 0s 0 0 22458.8192 0 25 22468.0000 22458.8192 0.04% - 0s 0 0 22458.8192 0 9 22468.0000 22458.8192 0.04% - 0s 0 0 22458.9085 0 26 22468.0000 22458.9085 0.04% - 0s 0 0 22459.2739 0 35 22468.0000 22459.2739 0.04% - 0s 0 0 22459.8191 0 38 22468.0000 22459.8191 0.04% - 0s 0 2 22460.1321 0 38 22468.0000 22460.1321 0.04% - 0s H 1 2 22467.000000 22460.1321 0.03% 0.0 0s * 402 26 41 22465.000000 22463.5525 0.01% 7.1 0s Cutting planes: Gomory: 6 Cover: 8 Implied bound: 2 Clique: 1 MIR: 26 Zero half: 4 Explored 403 nodes (6411 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.246500000000e+04, best bound 2.246400000000e+04, gap 0.0045%