Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:22 2012 Optimize a model with 577 rows, 153 columns and 1154 nonzeros Presolve removed 119 rows and 2 columns Presolve time: 0.00s Presolved: 458 rows, 151 columns, 988 nonzeros Variable types: 0 continuous, 151 integer (151 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.375000e+01, 258 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63.75000 0 117 48.00000 63.75000 32.8% - 0s 0 0 62.94013 0 149 48.00000 62.94013 31.1% - 0s H 0 0 52.0000000 62.94013 21.0% - 0s 0 0 62.32045 0 149 52.00000 62.32045 19.8% - 0s 0 0 62.01187 0 150 52.00000 62.01187 19.3% - 0s H 0 0 53.0000000 62.01187 17.0% - 0s 0 0 61.78014 0 151 53.00000 61.78014 16.6% - 0s 0 0 61.54605 0 149 53.00000 61.54605 16.1% - 0s 0 0 61.32727 0 149 53.00000 61.32727 15.7% - 0s H 0 0 54.0000000 61.32727 13.6% - 0s 0 0 61.14463 0 149 54.00000 61.14463 13.2% - 0s 0 0 60.98634 0 150 54.00000 60.98634 12.9% - 0s 0 0 60.90597 0 149 54.00000 60.90597 12.8% - 0s 0 0 60.74249 0 147 54.00000 60.74249 12.5% - 0s 0 0 60.64227 0 148 54.00000 60.64227 12.3% - 0s 0 0 60.53041 0 150 54.00000 60.53041 12.1% - 0s 0 0 60.43566 0 149 54.00000 60.43566 11.9% - 0s 0 0 60.40146 0 150 54.00000 60.40146 11.9% - 0s 0 0 60.40146 0 147 54.00000 60.40146 11.9% - 0s 0 2 60.39700 0 146 54.00000 60.39700 11.8% - 0s * 474 96 9 55.0000000 58.08672 5.61% 31.2 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 156 Explored 975 nodes (29751 simplex iterations) in 1.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%