Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:41:18 2012 Optimize a model with 603 rows, 158 columns and 1206 nonzeros Presolve removed 107 rows and 0 columns Presolve time: 0.00s Presolved: 496 rows, 158 columns, 1056 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.650000e+01, 276 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.50000 0 127 47.00000 66.50000 41.5% - 0s H 0 0 48.0000000 66.50000 38.5% - 0s 0 0 65.00000 0 128 48.00000 65.00000 35.4% - 0s 0 0 64.28571 0 154 48.00000 64.28571 33.9% - 0s H 0 0 50.0000000 64.28571 28.6% - 0s H 0 0 51.0000000 64.28571 26.1% - 0s 0 0 62.91964 0 154 51.00000 62.91964 23.4% - 0s 0 0 62.36671 0 155 51.00000 62.36671 22.3% - 0s 0 0 62.00566 0 155 51.00000 62.00566 21.6% - 0s 0 0 61.83195 0 157 51.00000 61.83195 21.2% - 0s 0 0 61.69520 0 155 51.00000 61.69520 21.0% - 0s 0 0 61.39529 0 154 51.00000 61.39529 20.4% - 0s 0 0 61.24796 0 156 51.00000 61.24796 20.1% - 0s 0 0 61.10591 0 156 51.00000 61.10591 19.8% - 0s 0 0 61.02484 0 156 51.00000 61.02484 19.7% - 0s 0 0 60.98018 0 156 51.00000 60.98018 19.6% - 0s 0 0 60.98018 0 155 51.00000 60.98018 19.6% - 0s H 0 0 52.0000000 60.98018 17.3% - 0s 0 2 60.97849 0 155 52.00000 60.97849 17.3% - 0s * 18 18 12 53.0000000 60.78299 14.7% 45.1 0s H 86 40 55.0000000 60.15814 9.38% 46.7 0s H 585 46 56.0000000 57.95833 3.50% 40.3 1s Cutting planes: Zero half: 169 Explored 669 nodes (26884 simplex iterations) in 1.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%