Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:34:39 2012 Optimize a model with 528 rows, 146 columns and 1056 nonzeros Presolve removed 106 rows and 5 columns Presolve time: 0.00s Presolved: 422 rows, 141 columns, 890 nonzeros Variable types: 0 continuous, 141 integer (141 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.175000e+01, 215 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61.75000 0 124 46.00000 61.75000 34.2% - 0s 0 0 60.50000 0 113 46.00000 60.50000 31.5% - 0s 0 0 60.31250 0 139 46.00000 60.31250 31.1% - 0s H 0 0 48.0000000 60.31250 25.7% - 0s 0 0 59.14286 0 133 48.00000 59.14286 23.2% - 0s H 0 0 49.0000000 59.14286 20.7% - 0s 0 0 58.66667 0 138 49.00000 58.66667 19.7% - 0s 0 0 58.33333 0 135 49.00000 58.33333 19.0% - 0s 0 0 58.14286 0 134 49.00000 58.14286 18.7% - 0s 0 0 57.94737 0 139 49.00000 57.94737 18.3% - 0s 0 0 57.92070 0 138 49.00000 57.92070 18.2% - 0s H 0 0 50.0000000 57.92070 15.8% - 0s 0 0 57.88235 0 140 50.00000 57.88235 15.8% - 0s 0 0 57.88235 0 137 50.00000 57.88235 15.8% - 0s 0 2 57.88235 0 136 50.00000 57.88235 15.8% - 0s * 14 14 11 51.0000000 57.70000 13.1% 37.4 0s * 149 50 13 52.0000000 56.54286 8.74% 32.2 0s * 698 57 10 53.0000000 54.66667 3.14% 28.0 0s Cutting planes: Gomory: 2 Zero half: 150 Explored 776 nodes (21801 simplex iterations) in 0.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%