Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:53 2012 Optimize a model with 366 rows, 85 columns and 732 nonzeros Presolve removed 117 rows and 0 columns Presolve time: 0.00s Presolved: 249 rows, 85 columns, 589 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 3.182222e+01, 167 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.82222 0 83 23.00000 31.82222 38.4% - 0s H 0 0 24.0000000 31.82222 32.6% - 0s H 0 0 26.0000000 31.82222 22.4% - 0s 0 0 31.22667 0 81 26.00000 31.22667 20.1% - 0s 0 0 30.91627 0 84 26.00000 30.91627 18.9% - 0s 0 0 30.79289 0 82 26.00000 30.79289 18.4% - 0s 0 0 30.68238 0 84 26.00000 30.68238 18.0% - 0s 0 0 30.62592 0 84 26.00000 30.62592 17.8% - 0s 0 0 30.49665 0 84 26.00000 30.49665 17.3% - 0s 0 0 30.44991 0 83 26.00000 30.44991 17.1% - 0s 0 0 30.30225 0 82 26.00000 30.30225 16.5% - 0s 0 0 30.08750 0 84 26.00000 30.08750 15.7% - 0s 0 0 30.03626 0 83 26.00000 30.03626 15.5% - 0s 0 0 30.02418 0 84 26.00000 30.02418 15.5% - 0s 0 0 30.02418 0 84 26.00000 30.02418 15.5% - 0s 0 2 30.02414 0 84 26.00000 30.02414 15.5% - 0s Cutting planes: Gomory: 1 Zero half: 54 Explored 179 nodes (3740 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%