Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:11 2012 Optimize a model with 637 rows, 115 columns and 1274 nonzeros Presolve removed 232 rows and 0 columns Presolve time: 0.00s Presolved: 405 rows, 115 columns, 999 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.068000e+01, 288 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.68000 0 111 31.00000 40.68000 31.2% - 0s 0 0 39.80684 0 108 31.00000 39.80684 28.4% - 0s H 0 0 32.0000000 39.80684 24.4% - 0s 0 0 39.54606 0 112 32.00000 39.54606 23.6% - 0s 0 0 39.32064 0 112 32.00000 39.32064 22.9% - 0s 0 0 39.20030 0 114 32.00000 39.20030 22.5% - 0s 0 0 39.15822 0 115 32.00000 39.15822 22.4% - 0s 0 0 39.10474 0 114 32.00000 39.10474 22.2% - 0s 0 0 39.04979 0 113 32.00000 39.04979 22.0% - 0s 0 0 38.94169 0 112 32.00000 38.94169 21.7% - 0s 0 0 38.90876 0 114 32.00000 38.90876 21.6% - 0s 0 0 38.87883 0 115 32.00000 38.87883 21.5% - 0s 0 0 38.87208 0 114 32.00000 38.87208 21.5% - 0s 0 0 38.78850 0 115 32.00000 38.78850 21.2% - 0s 0 0 38.75465 0 115 32.00000 38.75465 21.1% - 0s 0 0 38.72526 0 113 32.00000 38.72526 21.0% - 0s 0 0 38.69314 0 113 32.00000 38.69314 20.9% - 0s 0 0 38.66919 0 114 32.00000 38.66919 20.8% - 0s 0 0 38.63450 0 114 32.00000 38.63450 20.7% - 0s 0 0 38.62374 0 113 32.00000 38.62374 20.7% - 0s 0 0 38.61192 0 114 32.00000 38.61192 20.7% - 0s 0 0 38.61192 0 112 32.00000 38.61192 20.7% - 0s 0 2 38.61186 0 112 32.00000 38.61186 20.7% - 0s * 46 20 9 33.0000000 38.33263 16.2% 39.8 0s * 159 32 12 34.0000000 36.98529 8.78% 35.4 0s Cutting planes: Gomory: 1 Clique: 2 Zero half: 74 Mod-K: 1 Explored 322 nodes (11222 simplex iterations) in 0.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%