Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:17:03 2013 Optimize a model with 5488 rows, 1024 columns and 16896 nonzeros Presolve removed 839 rows and 528 columns Presolve time: 0.04s Presolved: 4649 rows, 496 columns, 14265 nonzeros Variable types: 11 continuous, 485 integer (485 binary) Found heuristic solution: objective 22775.000000 Root relaxation: objective 1.868415e+04, 2023 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18684.1481 0 5 22775.0000 18684.1481 18.0% - 0s H 0 0 18691.000000 18684.1481 0.04% - 0s 0 0 18685.0006 0 12 18691.0000 18685.0006 0.03% - 0s 0 0 18685.0006 0 4 18691.0000 18685.0006 0.03% - 0s H 0 0 18690.000000 18685.0006 0.03% - 0s 0 0 18688.2000 0 6 18690.0000 18688.2000 0.01% - 0s Cutting planes: Gomory: 1 Cover: 1 MIR: 7 GUB cover: 1 Explored 0 nodes (2110 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.869000000000e+04, best bound 1.868900000000e+04, gap 0.0054%