Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:41 2012 Optimize a model with 426 rows, 131 columns and 852 nonzeros Presolve removed 54 rows and 2 columns Presolve time: 0.00s Presolved: 372 rows, 129 columns, 777 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 5.750000e+01, 214 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.50000 0 103 45.00000 57.50000 27.8% - 0s 0 0 56.00000 0 106 45.00000 56.00000 24.4% - 0s 0 0 56.00000 0 125 45.00000 56.00000 24.4% - 0s H 0 0 46.0000000 56.00000 21.7% - 0s 0 0 55.20690 0 124 46.00000 55.20690 20.0% - 0s 0 0 54.55224 0 127 46.00000 54.55224 18.6% - 0s 0 0 53.89520 0 128 46.00000 53.89520 17.2% - 0s 0 0 53.65385 0 128 46.00000 53.65385 16.6% - 0s H 0 0 48.0000000 53.65385 11.8% - 0s 0 0 53.55369 0 126 48.00000 53.55369 11.6% - 0s 0 0 53.42308 0 128 48.00000 53.42308 11.3% - 0s 0 0 53.35753 0 128 48.00000 53.35753 11.2% - 0s 0 0 53.19080 0 127 48.00000 53.19080 10.8% - 0s 0 0 53.03028 0 128 48.00000 53.03028 10.5% - 0s 0 0 52.97245 0 128 48.00000 52.97245 10.4% - 0s 0 0 52.97245 0 126 48.00000 52.97245 10.4% - 0s 0 2 52.97245 0 126 48.00000 52.97245 10.4% - 0s H 27 4 49.0000000 52.97245 8.11% 27.9 0s Cutting planes: Gomory: 1 Zero half: 132 Explored 109 nodes (5303 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%