Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:14 2012 Optimize a model with 513 rows, 139 columns and 1026 nonzeros Presolve removed 126 rows and 3 columns Presolve time: 0.00s Presolved: 387 rows, 136 columns, 839 nonzeros Variable types: 0 continuous, 136 integer (136 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.762821e+01, 269 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57.62821 0 130 43.00000 57.62821 34.0% - 0s H 0 0 45.0000000 57.62821 28.1% - 0s 0 0 56.52033 0 133 45.00000 56.52033 25.6% - 0s 0 0 56.01467 0 132 45.00000 56.01467 24.5% - 0s 0 0 55.45144 0 136 45.00000 55.45144 23.2% - 0s 0 0 55.09186 0 133 45.00000 55.09186 22.4% - 0s 0 0 54.66481 0 136 45.00000 54.66481 21.5% - 0s 0 0 54.55502 0 135 45.00000 54.55502 21.2% - 0s H 0 0 46.0000000 54.55502 18.6% - 0s 0 0 54.36175 0 135 46.00000 54.36175 18.2% - 0s H 0 0 47.0000000 54.36175 15.7% - 0s 0 0 54.22624 0 136 47.00000 54.22624 15.4% - 0s 0 0 54.13785 0 136 47.00000 54.13785 15.2% - 0s 0 0 54.11152 0 136 47.00000 54.11152 15.1% - 0s 0 0 54.11152 0 134 47.00000 54.11152 15.1% - 0s 0 2 54.10907 0 134 47.00000 54.10907 15.1% - 0s * 406 154 17 48.0000000 52.00000 8.33% 26.7 0s 650 215 50.84211 27 112 48.00000 51.55556 7.41% 28.5 5s H 920 135 49.0000000 51.55556 5.22% 28.5 5s Cutting planes: Gomory: 3 Zero half: 105 Explored 1145 nodes (31823 simplex iterations) in 5.52 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%