Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:23 2012 Optimize a model with 494 rows, 140 columns and 988 nonzeros Presolve removed 95 rows and 0 columns Presolve time: 0.00s Presolved: 399 rows, 140 columns, 859 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 5.850000e+01, 242 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 0 103 45.00000 58.50000 30.0% - 0s 0 0 57.75000 0 126 45.00000 57.75000 28.3% - 0s 0 0 57.15217 0 135 45.00000 57.15217 27.0% - 0s H 0 0 49.0000000 57.15217 16.6% - 0s 0 0 56.14286 0 131 49.00000 56.14286 14.6% - 0s 0 0 55.89773 0 135 49.00000 55.89773 14.1% - 0s 0 0 55.83333 0 137 49.00000 55.83333 13.9% - 0s 0 0 55.56508 0 138 49.00000 55.56508 13.4% - 0s H 0 0 51.0000000 55.56508 8.95% - 0s 0 0 55.50000 0 138 51.00000 55.50000 8.82% - 0s 0 0 55.32000 0 136 51.00000 55.32000 8.47% - 0s 0 0 55.24387 0 134 51.00000 55.24387 8.32% - 0s 0 0 55.19357 0 138 51.00000 55.19357 8.22% - 0s 0 0 55.18573 0 139 51.00000 55.18573 8.21% - 0s 0 0 55.18573 0 137 51.00000 55.18573 8.21% - 0s 0 2 55.18319 0 136 51.00000 55.18319 8.20% - 0s * 9 7 6 52.0000000 54.96650 5.70% 42.6 0s Cutting planes: Gomory: 1 Zero half: 87 Explored 72 nodes (3299 simplex iterations) in 0.18 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%