Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:07 2013 Optimize a model with 411 rows, 2581 columns and 101211 nonzeros Presolve removed 41 rows and 752 columns Presolve time: 0.28s Presolved: 370 rows, 1829 columns, 88748 nonzeros Variable types: 0 continuous, 1829 integer (1829 binary) Found heuristic solution: objective 1565.0000000 Found heuristic solution: objective 1521.0000000 Root relaxation: objective 1.322250e+03, 424 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1322.25000 0 18 1521.00000 1322.25000 13.1% - 0s H 0 0 1373.0000000 1322.25000 3.70% - 0s * 0 0 0 1332.0000000 1332.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 2 Explored 0 nodes (540 simplex iterations) in 0.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.332000000000e+03, best bound 1.332000000000e+03, gap 0.0%