Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:42:52 2012 Optimize a model with 621 rows, 160 columns and 1242 nonzeros Presolve removed 128 rows and 2 columns Presolve time: 0.00s Presolved: 493 rows, 158 columns, 1061 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.627778e+01, 283 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.27778 0 151 49.00000 66.27778 35.3% - 0s 0 0 64.67442 0 155 49.00000 64.67442 32.0% - 0s 0 0 63.64286 0 157 49.00000 63.64286 29.9% - 0s 0 0 63.12443 0 156 49.00000 63.12443 28.8% - 0s H 0 0 51.0000000 63.12443 23.8% - 0s H 0 0 52.0000000 63.12443 21.4% - 0s 0 0 62.75388 0 156 52.00000 62.75388 20.7% - 0s 0 0 62.49708 0 157 52.00000 62.49708 20.2% - 0s 0 0 62.39989 0 156 52.00000 62.39989 20.0% - 0s 0 0 62.30209 0 155 52.00000 62.30209 19.8% - 0s 0 0 62.22554 0 156 52.00000 62.22554 19.7% - 0s 0 0 62.03647 0 155 52.00000 62.03647 19.3% - 0s 0 0 61.93214 0 155 52.00000 61.93214 19.1% - 0s 0 0 61.92004 0 157 52.00000 61.92004 19.1% - 0s 0 0 61.92004 0 157 52.00000 61.92004 19.1% - 0s 0 2 61.91863 0 157 52.00000 61.91863 19.1% - 0s H 28 25 54.0000000 61.91863 14.7% 44.5 0s 783 315 57.00000 26 113 54.00000 59.50000 10.2% 40.8 5s * 1730 388 43 55.0000000 58.55556 6.46% 33.0 5s Cutting planes: Gomory: 5 Zero half: 73 Explored 3663 nodes (99600 simplex iterations) in 7.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%