Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:54 2012 Optimize a model with 474 rows, 135 columns and 948 nonzeros Presolve removed 98 rows and 0 columns Presolve time: 0.00s Presolved: 376 rows, 135 columns, 817 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.510000e+01, 242 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.10000 0 125 43.00000 55.10000 28.1% - 0s H 0 0 46.0000000 55.10000 19.8% - 0s 0 0 54.29545 0 125 46.00000 54.29545 18.0% - 0s 0 0 54.00000 0 90 46.00000 54.00000 17.4% - 0s H 0 0 47.0000000 54.00000 14.9% - 0s 0 0 53.87129 0 131 47.00000 53.87129 14.6% - 0s H 0 0 48.0000000 53.87129 12.2% - 0s H 0 0 49.0000000 53.87129 9.94% - 0s 0 0 53.62500 0 126 49.00000 53.62500 9.44% - 0s 0 0 53.39723 0 133 49.00000 53.39723 8.97% - 0s 0 0 53.20116 0 135 49.00000 53.20116 8.57% - 0s 0 0 52.92899 0 132 49.00000 52.92899 8.02% - 0s 0 0 52.89767 0 132 49.00000 52.89767 7.95% - 0s 0 0 52.87092 0 133 49.00000 52.87092 7.90% - 0s 0 0 52.82837 0 133 49.00000 52.82837 7.81% - 0s 0 0 52.73090 0 134 49.00000 52.73090 7.61% - 0s 0 0 52.72154 0 134 49.00000 52.72154 7.59% - 0s 0 0 52.72154 0 132 49.00000 52.72154 7.59% - 0s 0 2 52.71780 0 132 49.00000 52.71780 7.59% - 0s H 5 5 50.0000000 52.71780 5.44% 43.8 0s Cutting planes: Gomory: 1 Zero half: 59 Explored 38 nodes (2650 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%