Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:05 2012 Optimize a model with 425 rows, 94 columns and 850 nonzeros Presolve removed 137 rows and 2 columns Presolve time: 0.00s Presolved: 288 rows, 92 columns, 675 nonzeros Variable types: 0 continuous, 92 integer (92 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.600000e+01, 152 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.00000 0 66 27.00000 36.00000 33.3% - 0s H 0 0 31.0000000 36.00000 16.1% - 0s 0 0 35.30000 0 82 31.00000 35.30000 13.9% - 0s H 0 0 32.0000000 35.30000 10.3% - 0s 0 0 35.05239 0 86 32.00000 35.05239 9.54% - 0s 0 0 34.65299 0 88 32.00000 34.65299 8.29% - 0s 0 0 34.42701 0 89 32.00000 34.42701 7.58% - 0s 0 0 34.28916 0 90 32.00000 34.28916 7.15% - 0s 0 0 34.23416 0 85 32.00000 34.23416 6.98% - 0s 0 0 34.10952 0 91 32.00000 34.10952 6.59% - 0s 0 0 34.03222 0 90 32.00000 34.03222 6.35% - 0s 0 0 33.99880 0 90 32.00000 33.99880 6.25% - 0s 0 0 33.93684 0 91 32.00000 33.93684 6.05% - 0s 0 0 33.88653 0 91 32.00000 33.88653 5.90% - 0s 0 0 33.86969 0 91 32.00000 33.86969 5.84% - 0s 0 0 33.86969 0 91 32.00000 33.86969 5.84% - 0s 0 2 33.86969 0 90 32.00000 33.86969 5.84% - 0s Cutting planes: Gomory: 1 Zero half: 37 Explored 14 nodes (1143 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%