Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:10 2012 Optimize a model with 281 rows, 101 columns and 562 nonzeros Presolve removed 51 rows and 4 columns Presolve time: 0.00s Presolved: 230 rows, 97 columns, 482 nonzeros Variable types: 0 continuous, 97 integer (97 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.650000e+01, 131 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.50000 0 85 38.00000 46.50000 22.4% - 0s H 0 0 39.0000000 46.50000 19.2% - 0s 0 0 45.00000 0 72 39.00000 45.00000 15.4% - 0s H 0 0 40.0000000 45.00000 12.5% - 0s 0 0 44.50000 0 93 40.00000 44.50000 11.3% - 0s 0 0 44.00000 0 97 40.00000 44.00000 10.0% - 0s 0 0 43.77966 0 92 40.00000 43.77966 9.45% - 0s H 0 0 41.0000000 43.77966 6.78% - 0s 0 0 43.60000 0 93 41.00000 43.60000 6.34% - 0s 0 0 43.43590 0 90 41.00000 43.43590 5.94% - 0s 0 0 43.35484 0 96 41.00000 43.35484 5.74% - 0s 0 0 43.29348 0 89 41.00000 43.29348 5.59% - 0s 0 0 43.20000 0 90 41.00000 43.20000 5.37% - 0s 0 0 43.15054 0 90 41.00000 43.15054 5.25% - 0s 0 0 43.10000 0 90 41.00000 43.10000 5.12% - 0s 0 0 43.10000 0 88 41.00000 43.10000 5.12% - 0s H 0 0 42.0000000 43.10000 2.62% - 0s 0 0 cutoff 0 42.00000 42.00000 0.0% - 0s Cutting planes: Gomory: 1 Zero half: 35 Explored 1 nodes (596 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%