Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:16:08 2012 Optimize a model with 767 rows, 176 columns and 1534 nonzeros Presolve removed 175 rows and 0 columns Presolve time: 0.00s Presolved: 592 rows, 176 columns, 1297 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.103704e+01, 376 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.03704 0 171 52.00000 71.03704 36.6% - 0s H 0 0 56.0000000 71.03704 26.9% - 0s 0 0 69.95098 0 175 56.00000 69.95098 24.9% - 0s H 0 0 57.0000000 69.95098 22.7% - 0s 0 0 68.86066 0 172 57.00000 68.86066 20.8% - 0s H 0 0 58.0000000 68.86066 18.7% - 0s 0 0 68.25665 0 174 58.00000 68.25665 17.7% - 0s 0 0 67.89397 0 172 58.00000 67.89397 17.1% - 0s 0 0 67.55127 0 176 58.00000 67.55127 16.5% - 0s 0 0 67.11773 0 175 58.00000 67.11773 15.7% - 0s 0 0 66.95560 0 175 58.00000 66.95560 15.4% - 0s 0 0 66.78718 0 175 58.00000 66.78718 15.2% - 0s 0 0 66.71129 0 175 58.00000 66.71129 15.0% - 0s 0 0 66.66014 0 176 58.00000 66.66014 14.9% - 0s H 0 0 59.0000000 66.66014 13.0% - 0s 0 0 66.61294 0 176 59.00000 66.61294 12.9% - 0s 0 0 66.52799 0 175 59.00000 66.52799 12.8% - 0s 0 0 66.45083 0 175 59.00000 66.45083 12.6% - 0s 0 0 66.42775 0 175 59.00000 66.42775 12.6% - 0s 0 0 66.42775 0 174 59.00000 66.42775 12.6% - 0s 0 2 66.42504 0 174 59.00000 66.42504 12.6% - 0s 611 199 62.29675 14 175 59.00000 63.97931 8.44% 47.8 5s 2746 540 61.16667 25 128 59.00000 62.49761 5.93% 41.6 10s Cutting planes: Gomory: 3 Zero half: 73 Mod-K: 1 Explored 5721 nodes (195893 simplex iterations) in 13.69 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%