Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:45:22 2012 Optimize a model with 1871 rows, 86 columns and 3742 nonzeros Presolve removed 1329 rows and 0 columns Presolve time: 0.06s Presolved: 542 rows, 86 columns, 3678 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.252367e+01, 328 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.52367 0 81 7.00000 12.52367 78.9% - 0s H 0 0 8.0000000 12.52367 56.5% - 0s 0 0 12.17097 0 82 8.00000 12.17097 52.1% - 0s 0 0 12.11104 0 82 8.00000 12.11104 51.4% - 0s 0 0 12.09649 0 84 8.00000 12.09649 51.2% - 0s 0 0 12.09427 0 85 8.00000 12.09427 51.2% - 0s 0 0 12.09389 0 85 8.00000 12.09389 51.2% - 0s 0 0 12.09386 0 85 8.00000 12.09386 51.2% - 0s 0 2 12.09201 0 85 8.00000 12.09201 51.2% - 0s Cutting planes: Clique: 54 Zero half: 4 Explored 117 nodes (6147 simplex iterations) in 0.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%