Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:04 2012 Optimize a model with 489 rows, 135 columns and 978 nonzeros Presolve removed 93 rows and 0 columns Presolve time: 0.00s Presolved: 396 rows, 135 columns, 851 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 5.650000e+01, 215 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56.50000 0 113 39.00000 56.50000 44.9% - 0s 0 0 54.81132 0 132 39.00000 54.81132 40.5% - 0s H 0 0 42.0000000 54.81132 30.5% - 0s 0 0 53.70000 0 129 42.00000 53.70000 27.9% - 0s 0 0 53.66667 0 130 42.00000 53.66667 27.8% - 0s 0 0 53.63158 0 132 42.00000 53.63158 27.7% - 0s 0 0 53.07093 0 131 42.00000 53.07093 26.4% - 0s 0 0 52.82265 0 132 42.00000 52.82265 25.8% - 0s H 0 0 43.0000000 52.82265 22.8% - 0s 0 0 52.68028 0 133 43.00000 52.68028 22.5% - 0s 0 0 52.54615 0 132 43.00000 52.54615 22.2% - 0s 0 0 52.43561 0 132 43.00000 52.43561 21.9% - 0s 0 0 52.37367 0 132 43.00000 52.37367 21.8% - 0s 0 0 52.33363 0 134 43.00000 52.33363 21.7% - 0s 0 0 52.33363 0 133 43.00000 52.33363 21.7% - 0s H 0 0 44.0000000 52.33363 18.9% - 0s 0 2 52.33217 0 133 44.00000 52.33217 18.9% - 0s H 7 7 45.0000000 52.33217 16.3% 53.0 0s * 17 10 12 46.0000000 52.33217 13.8% 29.4 0s H 52 18 47.0000000 51.60705 9.80% 36.8 0s Cutting planes: Gomory: 2 Zero half: 130 Explored 545 nodes (16584 simplex iterations) in 0.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%