Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:17 2012 Optimize a model with 351 rows, 113 columns and 702 nonzeros Presolve removed 72 rows and 3 columns Presolve time: 0.00s Presolved: 279 rows, 110 columns, 593 nonzeros Variable types: 0 continuous, 110 integer (110 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 4.950000e+01, 177 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.50000 0 91 37.00000 49.50000 33.8% - 0s 0 0 48.00000 0 86 37.00000 48.00000 29.7% - 0s H 0 0 38.0000000 48.00000 26.3% - 0s 0 0 47.75000 0 108 38.00000 47.75000 25.7% - 0s H 0 0 41.0000000 47.75000 16.5% - 0s 0 0 47.35551 0 106 41.00000 47.35551 15.5% - 0s 0 0 46.97656 0 108 41.00000 46.97656 14.6% - 0s 0 0 46.59939 0 109 41.00000 46.59939 13.7% - 0s 0 0 46.47368 0 109 41.00000 46.47368 13.4% - 0s 0 0 46.22820 0 110 41.00000 46.22820 12.8% - 0s 0 0 46.11857 0 109 41.00000 46.11857 12.5% - 0s 0 0 45.99896 0 109 41.00000 45.99896 12.2% - 0s 0 0 45.90086 0 109 41.00000 45.90086 12.0% - 0s 0 0 45.87815 0 109 41.00000 45.87815 11.9% - 0s 0 0 45.87815 0 109 41.00000 45.87815 11.9% - 0s H 0 0 43.0000000 45.87815 6.69% - 0s H 0 0 44.0000000 45.87815 4.27% - 0s 0 2 45.87791 0 109 44.00000 45.87791 4.27% - 0s Cutting planes: Gomory: 2 Zero half: 46 Explored 13 nodes (1039 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.400000000000e+01, best bound 4.400000000000e+01, gap 0.0%