Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:45:16 2012 Optimize a model with 654 rows, 162 columns and 1308 nonzeros Presolve removed 151 rows and 2 columns Presolve time: 0.00s Presolved: 503 rows, 160 columns, 1099 nonzeros Variable types: 0 continuous, 160 integer (160 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 6.612500e+01, 341 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.12500 0 146 52.00000 66.12500 27.2% - 0s 0 0 64.82143 0 155 52.00000 64.82143 24.7% - 0s 0 0 63.91176 0 153 52.00000 63.91176 22.9% - 0s H 0 0 53.0000000 63.91176 20.6% - 0s 0 0 63.68493 0 155 53.00000 63.68493 20.2% - 0s 0 0 63.11829 0 152 53.00000 63.11829 19.1% - 0s 0 0 62.82756 0 154 53.00000 62.82756 18.5% - 0s 0 0 62.70787 0 158 53.00000 62.70787 18.3% - 0s H 0 0 54.0000000 62.70787 16.1% - 0s 0 0 62.54303 0 158 54.00000 62.54303 15.8% - 0s 0 0 62.47561 0 158 54.00000 62.47561 15.7% - 0s 0 0 62.39032 0 160 54.00000 62.39032 15.5% - 0s 0 0 62.32828 0 158 54.00000 62.32828 15.4% - 0s 0 0 62.32426 0 159 54.00000 62.32426 15.4% - 0s 0 0 62.32426 0 158 54.00000 62.32426 15.4% - 0s H 0 0 55.0000000 62.32426 13.3% - 0s 0 2 62.32426 0 158 55.00000 62.32426 13.3% - 0s H 59 24 56.0000000 61.46239 9.75% 44.8 0s 619 161 57.00000 15 159 56.00000 59.70430 6.61% 35.4 5s 1626 240 57.89744 21 134 56.00000 58.72180 4.86% 36.6 10s Cutting planes: Gomory: 1 Zero half: 157 Explored 2484 nodes (81967 simplex iterations) in 11.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%