Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:14 2012 Optimize a model with 2288 rows, 96 columns and 4576 nonzeros Presolve removed 1598 rows and 0 columns Presolve time: 0.06s Presolved: 690 rows, 96 columns, 4511 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.381321e+01, 334 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.81321 0 91 7.00000 13.81321 97.3% - 0s H 0 0 8.0000000 13.81321 72.7% - 0s 0 0 13.46583 0 95 8.00000 13.46583 68.3% - 0s 0 0 13.39261 0 93 8.00000 13.39261 67.4% - 0s 0 0 13.33591 0 95 8.00000 13.33591 66.7% - 0s 0 0 13.33107 0 94 8.00000 13.33107 66.6% - 0s 0 0 13.32114 0 95 8.00000 13.32114 66.5% - 0s 0 0 13.31577 0 96 8.00000 13.31577 66.4% - 0s 0 0 13.31470 0 96 8.00000 13.31470 66.4% - 0s H 0 0 9.0000000 13.31470 47.9% - 0s 0 2 13.30972 0 96 9.00000 13.30972 47.9% - 0s Cutting planes: Clique: 68 Zero half: 1 Explored 122 nodes (7807 simplex iterations) in 1.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%