Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:18 2012 Optimize a model with 634 rows, 153 columns and 1268 nonzeros Presolve removed 143 rows and 3 columns Presolve time: 0.00s Presolved: 491 rows, 150 columns, 1070 nonzeros Variable types: 0 continuous, 150 integer (150 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.093750e+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 60.93750 0 147 47.00000 60.93750 29.7% - 0s 0 0 59.91895 0 149 47.00000 59.91895 27.5% - 0s 0 0 59.35774 0 146 47.00000 59.35774 26.3% - 0s H 0 0 48.0000000 59.35774 23.7% - 0s 0 0 58.89808 0 148 48.00000 58.89808 22.7% - 0s 0 0 58.57459 0 147 48.00000 58.57459 22.0% - 0s 0 0 58.20420 0 149 48.00000 58.20420 21.3% - 0s 0 0 57.92514 0 148 48.00000 57.92514 20.7% - 0s 0 0 57.83495 0 150 48.00000 57.83495 20.5% - 0s 0 0 57.72846 0 148 48.00000 57.72846 20.3% - 0s 0 0 57.61932 0 150 48.00000 57.61932 20.0% - 0s 0 0 57.54651 0 150 48.00000 57.54651 19.9% - 0s 0 0 57.51592 0 150 48.00000 57.51592 19.8% - 0s 0 0 57.51592 0 149 48.00000 57.51592 19.8% - 0s 0 2 57.51564 0 149 48.00000 57.51564 19.8% - 0s * 16 13 13 49.0000000 57.49210 17.3% 45.6 0s * 34 23 13 50.0000000 57.18895 14.4% 45.9 0s * 40 20 13 51.0000000 57.18895 12.1% 40.6 0s H 548 70 52.0000000 54.70000 5.19% 36.8 0s Cutting planes: Zero half: 128 Explored 790 nodes (28176 simplex iterations) in 1.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%