Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:56 2012 Optimize a model with 397 rows, 88 columns and 794 nonzeros Presolve removed 132 rows and 0 columns Presolve time: 0.00s Presolved: 265 rows, 88 columns, 636 nonzeros Variable types: 0 continuous, 88 integer (88 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.188889e+01, 146 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.88889 0 78 25.00000 31.88889 27.6% - 0s 0 0 31.41346 0 84 25.00000 31.41346 25.7% - 0s 0 0 31.00000 0 82 25.00000 31.00000 24.0% - 0s 0 0 31.00000 0 83 25.00000 31.00000 24.0% - 0s 0 0 31.00000 0 83 25.00000 31.00000 24.0% - 0s 0 0 31.00000 0 83 25.00000 31.00000 24.0% - 0s H 0 0 26.0000000 31.00000 19.2% - 0s 0 2 31.00000 0 82 26.00000 31.00000 19.2% - 0s * 19 11 8 27.0000000 31.00000 14.8% 30.2 0s Cutting planes: Gomory: 2 Clique: 1 Zero half: 30 Explored 157 nodes (3777 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%