Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012 Optimize a model with 354 rows, 123 columns and 708 nonzeros Presolve removed 61 rows and 4 columns Presolve time: 0.00s Presolved: 293 rows, 119 columns, 616 nonzeros Variable types: 0 continuous, 119 integer (119 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.316667e+01, 179 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.16667 0 110 44.00000 53.16667 20.8% - 0s 0 0 51.71951 0 115 44.00000 51.71951 17.5% - 0s H 0 0 45.0000000 51.71951 14.9% - 0s 0 0 51.42188 0 116 45.00000 51.42188 14.3% - 0s 0 0 51.22099 0 116 45.00000 51.22099 13.8% - 0s 0 0 51.03883 0 115 45.00000 51.03883 13.4% - 0s H 0 0 46.0000000 51.03883 11.0% - 0s 0 0 50.90562 0 119 46.00000 50.90562 10.7% - 0s 0 0 50.84524 0 117 46.00000 50.84524 10.5% - 0s 0 0 50.68354 0 117 46.00000 50.68354 10.2% - 0s 0 0 50.62451 0 117 46.00000 50.62451 10.1% - 0s 0 0 50.59792 0 119 46.00000 50.59792 10.0% - 0s 0 0 50.59792 0 116 46.00000 50.59792 10.0% - 0s H 0 0 47.0000000 50.59792 7.66% - 0s 0 2 50.58964 0 116 47.00000 50.58964 7.64% - 0s * 10 7 9 48.0000000 50.58964 5.40% 17.7 0s Cutting planes: Gomory: 2 Zero half: 55 Explored 40 nodes (1508 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%