Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:21 2012 Optimize a model with 517 rows, 139 columns and 1034 nonzeros Presolve removed 97 rows and 0 columns Presolve time: 0.00s Presolved: 420 rows, 139 columns, 903 nonzeros Variable types: 0 continuous, 139 integer (139 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.750000e+01, 207 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.50000 0 113 44.00000 57.50000 30.7% - 0s 0 0 57.00000 0 114 44.00000 57.00000 29.5% - 0s 0 0 56.72085 0 136 44.00000 56.72085 28.9% - 0s H 0 0 47.0000000 56.72085 20.7% - 0s H 0 0 48.0000000 56.72085 18.2% - 0s 0 0 55.70980 0 135 48.00000 55.70980 16.1% - 0s 0 0 55.15648 0 135 48.00000 55.15648 14.9% - 0s 0 0 54.54620 0 136 48.00000 54.54620 13.6% - 0s 0 0 54.25556 0 136 48.00000 54.25556 13.0% - 0s 0 0 54.11055 0 138 48.00000 54.11055 12.7% - 0s 0 0 53.97348 0 137 48.00000 53.97348 12.4% - 0s 0 0 53.89379 0 139 48.00000 53.89379 12.3% - 0s 0 0 53.83046 0 138 48.00000 53.83046 12.1% - 0s 0 0 53.82043 0 139 48.00000 53.82043 12.1% - 0s 0 0 53.82043 0 138 48.00000 53.82043 12.1% - 0s H 0 0 49.0000000 53.82043 9.84% - 0s 0 2 53.81403 0 138 49.00000 53.81403 9.82% - 0s H 35 21 50.0000000 53.01502 6.03% 50.9 0s Cutting planes: Zero half: 103 Explored 131 nodes (5852 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%