Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:43:46 2012 Optimize a model with 825 rows, 183 columns and 1650 nonzeros Presolve removed 177 rows and 0 columns Presolve time: 0.01s Presolved: 648 rows, 183 columns, 1419 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 7.300000e+01, 328 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.00000 0 142 46.00000 73.00000 58.7% - 0s H 0 0 47.0000000 73.00000 55.3% - 0s 0 0 71.73333 0 177 47.00000 71.73333 52.6% - 0s H 0 0 54.0000000 71.73333 32.8% - 0s 0 0 70.85430 0 179 54.00000 70.85430 31.2% - 0s 0 0 69.79278 0 180 54.00000 69.79278 29.2% - 0s 0 0 68.83570 0 177 54.00000 68.83570 27.5% - 0s 0 0 68.24547 0 182 54.00000 68.24547 26.4% - 0s 0 0 68.02268 0 183 54.00000 68.02268 26.0% - 0s 0 0 67.88966 0 183 54.00000 67.88966 25.7% - 0s 0 0 67.78003 0 183 54.00000 67.78003 25.5% - 0s 0 0 67.75032 0 183 54.00000 67.75032 25.5% - 0s 0 0 67.75032 0 182 54.00000 67.75032 25.5% - 0s H 0 0 55.0000000 67.75032 23.2% - 0s H 0 0 57.0000000 67.75032 18.9% - 0s 0 2 67.75020 0 182 57.00000 67.75020 18.9% - 0s H 329 158 58.0000000 66.17792 14.1% 48.2 0s 609 294 63.16667 5 182 58.00000 65.59560 13.1% 46.7 5s 1615 639 59.95833 28 132 58.00000 64.74532 11.6% 47.6 10s 4313 1815 60.87500 23 127 58.00000 63.25000 9.05% 38.2 15s 8126 2834 60.59302 32 142 58.00000 62.32143 7.45% 33.8 20s 12778 3519 59.50000 32 92 58.00000 61.52941 6.09% 30.7 25s 18165 3582 60.12500 30 124 58.00000 60.97561 5.13% 28.7 30s 23976 2800 cutoff 30 58.00000 60.25000 3.88% 27.4 35s Cutting planes: Gomory: 3 Zero half: 88 Explored 30515 nodes (783559 simplex iterations) in 39.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%