Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:40 2012 Optimize a model with 592 rows, 147 columns and 1184 nonzeros Presolve removed 120 rows and 0 columns Presolve time: 0.00s Presolved: 472 rows, 147 columns, 1021 nonzeros Variable types: 0 continuous, 147 integer (147 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.950000e+01, 254 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.50000 0 123 43.00000 59.50000 38.4% - 0s 0 0 58.78571 0 138 43.00000 58.78571 36.7% - 0s H 0 0 45.0000000 58.78571 30.6% - 0s H 0 0 48.0000000 58.78571 22.5% - 0s 0 0 57.83333 0 142 48.00000 57.83333 20.5% - 0s 0 0 57.42500 0 146 48.00000 57.42500 19.6% - 0s 0 0 57.01961 0 144 48.00000 57.01961 18.8% - 0s 0 0 56.73256 0 145 48.00000 56.73256 18.2% - 0s 0 0 56.48592 0 146 48.00000 56.48592 17.7% - 0s 0 0 56.34139 0 142 48.00000 56.34139 17.4% - 0s 0 0 56.28938 0 145 48.00000 56.28938 17.3% - 0s 0 0 56.21174 0 142 48.00000 56.21174 17.1% - 0s H 0 0 49.0000000 56.21174 14.7% - 0s 0 0 56.15823 0 145 49.00000 56.15823 14.6% - 0s 0 0 56.06598 0 143 49.00000 56.06598 14.4% - 0s 0 0 56.02674 0 146 49.00000 56.02674 14.3% - 0s 0 0 56.02674 0 146 49.00000 56.02674 14.3% - 0s 0 2 56.01980 0 146 49.00000 56.01980 14.3% - 0s H 10 10 50.0000000 56.01706 12.0% 48.0 0s H 165 34 51.0000000 54.47601 6.82% 39.6 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 142 Explored 446 nodes (17956 simplex iterations) in 0.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%