Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:12 2012 Optimize a model with 271 rows, 106 columns and 542 nonzeros Presolve removed 48 rows and 6 columns Presolve time: 0.00s Presolved: 223 rows, 100 columns, 464 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 4.750000e+01, 132 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.50000 0 83 41.00000 47.50000 15.9% - 0s 0 0 46.50000 0 81 41.00000 46.50000 13.4% - 0s 0 0 46.25000 0 92 41.00000 46.25000 12.8% - 0s 0 0 46.15385 0 96 41.00000 46.15385 12.6% - 0s H 0 0 43.0000000 46.15385 7.33% - 0s 0 0 45.46667 0 94 43.00000 45.46667 5.74% - 0s 0 0 45.23810 0 96 43.00000 45.23810 5.20% - 0s 0 0 45.10000 0 92 43.00000 45.10000 4.88% - 0s 0 0 45.00000 0 87 43.00000 45.00000 4.65% - 0s 0 0 44.95868 0 96 43.00000 44.95868 4.56% - 0s 0 0 44.83333 0 96 43.00000 44.83333 4.26% - 0s 0 0 44.82353 0 96 43.00000 44.82353 4.24% - 0s 0 0 44.82353 0 95 43.00000 44.82353 4.24% - 0s 0 2 44.82353 0 95 43.00000 44.82353 4.24% - 0s Cutting planes: Gomory: 1 Zero half: 38 Explored 42 nodes (1092 simplex iterations) in 0.06 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%