Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:11 2012 Optimize a model with 290 rows, 103 columns and 580 nonzeros Presolve removed 74 rows and 8 columns Presolve time: 0.00s Presolved: 216 rows, 95 columns, 462 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.600000e+01, 129 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.00000 0 76 38.00000 46.00000 21.1% - 0s H 0 0 41.0000000 46.00000 12.2% - 0s 0 0 44.85714 0 89 41.00000 44.85714 9.41% - 0s H 0 0 42.0000000 44.85714 6.80% - 0s 0 0 44.61905 0 89 42.00000 44.61905 6.24% - 0s 0 0 44.37500 0 89 42.00000 44.37500 5.65% - 0s H 0 0 43.0000000 44.37500 3.20% - 0s 0 0 cutoff 0 43.00000 43.99996 2.33% - 0s Cutting planes: Gomory: 1 Zero half: 46 Explored 0 nodes (349 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%