Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:37 2012 Optimize a model with 607 rows, 150 columns and 1214 nonzeros Presolve removed 141 rows and 4 columns Presolve time: 0.00s Presolved: 466 rows, 146 columns, 1007 nonzeros Variable types: 0 continuous, 146 integer (146 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.300000e+01, 311 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63.00000 0 118 46.00000 63.00000 37.0% - 0s 0 0 62.10000 0 142 46.00000 62.10000 35.0% - 0s H 0 0 51.0000000 62.10000 21.8% - 0s 0 0 61.19951 0 142 51.00000 61.19951 20.0% - 0s H 0 0 52.0000000 61.19951 17.7% - 0s 0 0 60.52812 0 145 52.00000 60.52812 16.4% - 0s 0 0 60.12988 0 145 52.00000 60.12988 15.6% - 0s H 0 0 53.0000000 60.12988 13.5% - 0s 0 0 59.57242 0 141 53.00000 59.57242 12.4% - 0s 0 0 59.37500 0 144 53.00000 59.37500 12.0% - 0s 0 0 59.21711 0 143 53.00000 59.21711 11.7% - 0s 0 0 59.07491 0 143 53.00000 59.07491 11.5% - 0s 0 0 58.95831 0 143 53.00000 58.95831 11.2% - 0s 0 0 58.91176 0 145 53.00000 58.91176 11.2% - 0s 0 0 58.91176 0 145 53.00000 58.91176 11.2% - 0s 0 2 58.91132 0 143 53.00000 58.91132 11.2% - 0s * 87 17 13 54.0000000 57.93146 7.28% 37.3 0s Cutting planes: Gomory: 1 Zero half: 115 Explored 239 nodes (10325 simplex iterations) in 0.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%