Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:54:37 2012 Optimize a model with 698 rows, 167 columns and 1396 nonzeros Presolve removed 164 rows and 0 columns Presolve time: 0.00s Presolved: 534 rows, 167 columns, 1185 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 6.725000e+01, 351 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.25000 0 138 52.00000 67.25000 29.3% - 0s 0 0 66.27083 0 159 52.00000 66.27083 27.4% - 0s 0 0 65.27273 0 157 52.00000 65.27273 25.5% - 0s H 0 0 55.0000000 65.27273 18.7% - 0s 0 0 64.70734 0 148 55.00000 64.70734 17.6% - 0s H 0 0 56.0000000 64.70734 15.5% - 0s 0 0 64.39237 0 159 56.00000 64.39237 15.0% - 0s 0 0 64.09440 0 162 56.00000 64.09440 14.5% - 0s 0 0 63.83655 0 161 56.00000 63.83655 14.0% - 0s 0 0 63.67525 0 160 56.00000 63.67525 13.7% - 0s 0 0 63.62431 0 163 56.00000 63.62431 13.6% - 0s 0 0 63.57126 0 162 56.00000 63.57126 13.5% - 0s 0 0 63.54040 0 158 56.00000 63.54040 13.5% - 0s 0 0 63.54003 0 158 56.00000 63.54003 13.5% - 0s 0 0 63.54003 0 158 56.00000 63.54003 13.5% - 0s H 0 0 57.0000000 63.54003 11.5% - 0s 0 2 63.53370 0 158 57.00000 63.53370 11.5% - 0s * 70 28 10 58.0000000 62.90598 8.46% 43.1 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 127 Explored 822 nodes (31219 simplex iterations) in 1.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%