Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:38 2012 Optimize a model with 571 rows, 150 columns and 1142 nonzeros Presolve removed 111 rows and 0 columns Presolve time: 0.00s Presolved: 460 rows, 150 columns, 995 nonzeros Variable types: 0 continuous, 150 integer (150 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 6.200000e+01, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.00000 0 114 44.00000 62.00000 40.9% - 0s 0 0 61.16667 0 139 44.00000 61.16667 39.0% - 0s H 0 0 48.0000000 61.16667 27.4% - 0s 0 0 60.31818 0 145 48.00000 60.31818 25.7% - 0s 0 0 59.45098 0 141 48.00000 59.45098 23.9% - 0s 0 0 58.62500 0 142 48.00000 58.62500 22.1% - 0s H 0 0 49.0000000 58.62500 19.6% - 0s 0 0 58.15152 0 142 49.00000 58.15152 18.7% - 0s 0 0 57.86255 0 147 49.00000 57.86255 18.1% - 0s 0 0 57.66645 0 147 49.00000 57.66645 17.7% - 0s H 0 0 50.0000000 57.66645 15.3% - 0s 0 0 57.53571 0 148 50.00000 57.53571 15.1% - 0s 0 0 57.38244 0 146 50.00000 57.38244 14.8% - 0s 0 0 57.31745 0 147 50.00000 57.31745 14.6% - 0s 0 0 57.24405 0 147 50.00000 57.24405 14.5% - 0s 0 0 57.22989 0 144 50.00000 57.22989 14.5% - 0s 0 0 57.19458 0 148 50.00000 57.19458 14.4% - 0s 0 0 57.19458 0 148 50.00000 57.19458 14.4% - 0s 0 2 57.18814 0 147 50.00000 57.18814 14.4% - 0s H 32 22 51.0000000 56.95645 11.7% 43.4 0s * 35 19 10 52.0000000 56.95645 9.53% 42.8 0s Cutting planes: Zero half: 162 Explored 617 nodes (24173 simplex iterations) in 0.96 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%