Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012 Optimize a model with 263 rows, 97 columns and 526 nonzeros Presolve removed 68 rows and 10 columns Presolve time: 0.00s Presolved: 195 rows, 87 columns, 407 nonzeros Variable types: 0 continuous, 87 integer (87 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 4.350000e+01, 113 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.50000 0 69 35.00000 43.50000 24.3% - 0s 0 0 42.50000 0 65 35.00000 42.50000 21.4% - 0s H 0 0 38.0000000 42.50000 11.8% - 0s 0 0 42.26316 0 83 38.00000 42.26316 11.2% - 0s 0 0 41.66667 0 79 38.00000 41.66667 9.65% - 0s 0 0 41.54286 0 83 38.00000 41.54286 9.32% - 0s H 0 0 39.0000000 41.54286 6.52% - 0s 0 0 40.97436 0 85 39.00000 40.97436 5.06% - 0s 0 0 40.80000 0 82 39.00000 40.80000 4.62% - 0s 0 0 40.80000 0 83 39.00000 40.80000 4.62% - 0s 0 0 40.80000 0 76 39.00000 40.80000 4.62% - 0s 0 2 40.80000 0 76 39.00000 40.80000 4.62% - 0s * 5 5 3 40.0000000 40.50000 1.25% 24.2 0s Cutting planes: Gomory: 1 Zero half: 15 Explored 6 nodes (578 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%