Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:11 2012 Optimize a model with 243 rows, 103 columns and 486 nonzeros Presolve removed 105 rows and 34 columns Presolve time: 0.00s Presolved: 138 rows, 69 columns, 283 nonzeros Variable types: 0 continuous, 69 integer (69 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 4.850000e+01, 85 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48.50000 0 63 39.00000 48.50000 24.4% - 0s H 0 0 41.0000000 48.50000 18.3% - 0s H 0 0 42.0000000 48.50000 15.5% - 0s 0 0 47.00000 0 62 42.00000 47.00000 11.9% - 0s H 0 0 44.0000000 47.00000 6.82% - 0s 0 0 46.88889 0 67 44.00000 46.88889 6.57% - 0s 0 0 46.00000 0 62 44.00000 46.00000 4.55% - 0s H 0 0 45.0000000 46.00000 2.22% - 0s H 0 0 46.0000000 46.00000 0.0% - 0s Cutting planes: Gomory: 1 Zero half: 13 Explored 0 nodes (237 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%