Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:06 2012 Optimize a model with 469 rows, 136 columns and 938 nonzeros Presolve removed 87 rows and 3 columns Presolve time: 0.00s Presolved: 382 rows, 133 columns, 806 nonzeros Variable types: 0 continuous, 133 integer (133 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.850000e+01, 225 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.50000 0 105 46.00000 58.50000 27.2% - 0s H 0 0 48.0000000 58.50000 21.9% - 0s 0 0 57.50000 0 105 48.00000 57.50000 19.8% - 0s 0 0 57.33333 0 130 48.00000 57.33333 19.4% - 0s H 0 0 50.0000000 57.33333 14.7% - 0s 0 0 56.62500 0 127 50.00000 56.62500 13.3% - 0s 0 0 56.01887 0 130 50.00000 56.01887 12.0% - 0s 0 0 55.34807 0 130 50.00000 55.34807 10.7% - 0s 0 0 54.83212 0 129 50.00000 54.83212 9.66% - 0s 0 0 54.69565 0 125 50.00000 54.69565 9.39% - 0s 0 0 54.58772 0 132 50.00000 54.58772 9.18% - 0s 0 0 54.53595 0 126 50.00000 54.53595 9.07% - 0s 0 0 54.48889 0 133 50.00000 54.48889 8.98% - 0s 0 0 54.40672 0 127 50.00000 54.40672 8.81% - 0s 0 0 54.34031 0 132 50.00000 54.34031 8.68% - 0s 0 0 54.32813 0 133 50.00000 54.32813 8.66% - 0s 0 0 54.32813 0 132 50.00000 54.32813 8.66% - 0s 0 2 54.32809 0 132 50.00000 54.32809 8.66% - 0s * 22 6 5 52.0000000 54.17647 4.19% 34.5 0s Cutting planes: Zero half: 87 Explored 39 nodes (2331 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%