Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:38:38 2012 Optimize a model with 607 rows, 155 columns and 1214 nonzeros Presolve removed 115 rows and 0 columns Presolve time: 0.00s Presolved: 492 rows, 155 columns, 1057 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.400000e+01, 243 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.00000 0 126 45.00000 64.00000 42.2% - 0s 0 0 63.50000 0 121 45.00000 63.50000 41.1% - 0s H 0 0 46.0000000 63.50000 38.0% - 0s 0 0 62.75000 0 133 46.00000 62.75000 36.4% - 0s 0 0 61.56452 0 148 46.00000 61.56452 33.8% - 0s H 0 0 49.0000000 61.56452 25.6% - 0s 0 0 60.94828 0 149 49.00000 60.94828 24.4% - 0s 0 0 60.33728 0 154 49.00000 60.33728 23.1% - 0s 0 0 60.13790 0 154 49.00000 60.13790 22.7% - 0s 0 0 60.03635 0 153 49.00000 60.03635 22.5% - 0s 0 0 59.90989 0 155 49.00000 59.90989 22.3% - 0s 0 0 59.84678 0 155 49.00000 59.84678 22.1% - 0s 0 0 59.81276 0 155 49.00000 59.81276 22.1% - 0s 0 0 59.81276 0 154 49.00000 59.81276 22.1% - 0s 0 2 59.80318 0 154 49.00000 59.80318 22.0% - 0s H 11 11 52.0000000 59.50175 14.4% 81.3 0s * 17 13 11 53.0000000 59.50175 12.3% 59.6 0s 2056 402 54.00000 26 90 53.00000 56.00000 5.66% 29.0 5s Cutting planes: Gomory: 3 Zero half: 62 Explored 3957 nodes (95992 simplex iterations) in 6.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%