Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:28 2012 Optimize a model with 472 rows, 141 columns and 944 nonzeros Presolve removed 85 rows and 2 columns Presolve time: 0.00s Presolved: 387 rows, 139 columns, 825 nonzeros Variable types: 0 continuous, 139 integer (139 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.025000e+01, 243 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 60.25000 0 113 45.00000 60.25000 33.9% - 0s 0 0 59.18182 0 136 45.00000 59.18182 31.5% - 0s H 0 0 49.0000000 59.18182 20.8% - 0s 0 0 58.22727 0 133 49.00000 58.22727 18.8% - 0s H 0 0 50.0000000 58.22727 16.5% - 0s 0 0 57.62069 0 135 50.00000 57.62069 15.2% - 0s 0 0 57.41176 0 131 50.00000 57.41176 14.8% - 0s 0 0 57.25000 0 131 50.00000 57.25000 14.5% - 0s 0 0 57.16667 0 136 50.00000 57.16667 14.3% - 0s 0 0 57.02439 0 135 50.00000 57.02439 14.0% - 0s 0 0 56.79545 0 138 50.00000 56.79545 13.6% - 0s 0 0 56.64437 0 138 50.00000 56.64437 13.3% - 0s 0 0 56.57694 0 137 50.00000 56.57694 13.2% - 0s 0 0 56.55504 0 138 50.00000 56.55504 13.1% - 0s 0 0 56.55504 0 137 50.00000 56.55504 13.1% - 0s H 0 0 51.0000000 56.55504 10.9% - 0s 0 2 56.54120 0 137 51.00000 56.54120 10.9% - 0s H 40 16 52.0000000 56.18175 8.04% 41.8 0s * 48 10 10 53.0000000 56.18175 6.00% 38.0 0s Cutting planes: Zero half: 110 Explored 105 nodes (5076 simplex iterations) in 0.23 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%