Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:07 2012 Optimize a model with 233 rows, 93 columns and 466 nonzeros Presolve removed 62 rows and 8 columns Presolve time: 0.00s Presolved: 171 rows, 85 columns, 363 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 4.200000e+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 42.00000 0 65 37.00000 42.00000 13.5% - 0s H 0 0 39.0000000 42.00000 7.69% - 0s 0 0 41.30000 0 76 39.00000 41.30000 5.90% - 0s 0 0 41.00000 0 57 39.00000 41.00000 5.13% - 0s H 0 0 40.0000000 41.00000 2.50% - 0s 0 0 cutoff 0 40.00000 40.99996 2.50% - 0s Cutting planes: Gomory: 2 Zero half: 35 Explored 0 nodes (199 simplex iterations) in 0.01 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%