Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:52 2012 Optimize a model with 452 rows, 134 columns and 904 nonzeros Presolve removed 67 rows and 0 columns Presolve time: 0.00s Presolved: 385 rows, 134 columns, 807 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.800000e+01, 224 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.00000 0 112 43.00000 58.00000 34.9% - 0s H 0 0 45.0000000 58.00000 28.9% - 0s 0 0 56.75000 0 131 45.00000 56.75000 26.1% - 0s H 0 0 46.0000000 56.75000 23.4% - 0s 0 0 56.50000 0 130 46.00000 56.50000 22.8% - 0s 0 0 55.98113 0 132 46.00000 55.98113 21.7% - 0s 0 0 55.67474 0 133 46.00000 55.67474 21.0% - 0s 0 0 55.03079 0 134 46.00000 55.03079 19.6% - 0s 0 0 54.75676 0 134 46.00000 54.75676 19.0% - 0s 0 0 54.70633 0 133 46.00000 54.70633 18.9% - 0s 0 0 54.67125 0 134 46.00000 54.67125 18.9% - 0s 0 0 54.63177 0 133 46.00000 54.63177 18.8% - 0s 0 0 54.61513 0 134 46.00000 54.61513 18.7% - 0s 0 0 54.61513 0 134 46.00000 54.61513 18.7% - 0s H 0 0 47.0000000 54.61513 16.2% - 0s 0 2 54.59999 0 134 47.00000 54.59999 16.2% - 0s H 5 5 49.0000000 54.59999 11.4% 54.6 0s * 184 29 10 50.0000000 52.80916 5.62% 33.6 0s Cutting planes: Gomory: 2 Zero half: 132 Explored 270 nodes (9556 simplex iterations) in 0.37 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%