Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:10 2012 Optimize a model with 266 rows, 102 columns and 532 nonzeros Presolve removed 83 rows and 15 columns Presolve time: 0.00s Presolved: 183 rows, 87 columns, 380 nonzeros Variable types: 0 continuous, 87 integer (87 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.650000e+01, 105 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.50000 0 73 38.00000 46.50000 22.4% - 0s 0 0 45.60000 0 82 38.00000 45.60000 20.0% - 0s H 0 0 40.0000000 45.60000 14.0% - 0s H 0 0 41.0000000 45.60000 11.2% - 0s 0 0 45.40000 0 85 41.00000 45.40000 10.7% - 0s 0 0 44.87500 0 86 41.00000 44.87500 9.45% - 0s 0 0 44.55263 0 86 41.00000 44.55263 8.66% - 0s 0 0 44.00000 0 85 41.00000 44.00000 7.32% - 0s 0 0 43.97674 0 84 41.00000 43.97674 7.26% - 0s 0 0 43.83256 0 86 41.00000 43.83256 6.91% - 0s H 0 0 42.0000000 43.83256 4.36% - 0s 0 0 43.78000 0 86 42.00000 43.78000 4.24% - 0s 0 0 43.70000 0 83 42.00000 43.70000 4.05% - 0s 0 0 43.62500 0 83 42.00000 43.62500 3.87% - 0s 0 0 43.59259 0 87 42.00000 43.59259 3.79% - 0s 0 0 43.59259 0 86 42.00000 43.59259 3.79% - 0s 0 2 43.57692 0 85 42.00000 43.57692 3.75% - 0s Cutting planes: Zero half: 40 Explored 23 nodes (774 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%