Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:43:11 2013 Optimize a model with 9919 rows, 1521 columns and 30420 nonzeros Presolve removed 1557 rows and 787 columns Presolve time: 0.06s Presolved: 8362 rows, 734 columns, 25659 nonzeros Variable types: 16 continuous, 718 integer (718 binary) Found heuristic solution: objective 27437.000000 Root relaxation: objective 2.065048e+04, 3140 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 20650.4808 0 7 27437.0000 20650.4808 24.7% - 0s H 0 0 20665.000000 20650.4808 0.07% - 0s H 0 0 20662.000000 20650.4808 0.06% - 0s 0 0 20652.9000 0 6 20662.0000 20652.9000 0.04% - 0s 0 0 20652.9000 0 7 20662.0000 20652.9000 0.04% - 0s 0 0 20652.9333 0 9 20662.0000 20652.9333 0.04% - 0s H 0 0 20660.000000 20652.9333 0.03% - 0s H 0 0 20659.000000 20652.9333 0.03% - 0s 0 0 20653.0571 0 11 20659.0000 20653.0571 0.03% - 0s H 0 0 20658.000000 20653.0571 0.02% - 0s 0 1 20653.0630 0 11 20658.0000 20653.0630 0.02% - 0s Cutting planes: Gomory: 7 MIR: 14 Zero half: 3 Explored 15 nodes (3553 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.065800000000e+04, best bound 2.065700000000e+04, gap 0.0048%