Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:21 2012 Optimize a model with 333 rows, 118 columns and 666 nonzeros Presolve removed 52 rows and 4 columns Presolve time: 0.00s Presolved: 281 rows, 114 columns, 585 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.400000e+01, 148 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.00000 0 104 41.00000 54.00000 31.7% - 0s 0 0 52.25000 0 110 41.00000 52.25000 27.4% - 0s 0 0 51.60000 0 108 41.00000 51.60000 25.9% - 0s H 0 0 42.0000000 51.60000 22.9% - 0s 0 0 51.08182 0 114 42.00000 51.08182 21.6% - 0s H 0 0 44.0000000 51.08182 16.1% - 0s 0 0 50.68750 0 113 44.00000 50.68750 15.2% - 0s 0 0 50.10526 0 114 44.00000 50.10526 13.9% - 0s H 0 0 45.0000000 50.10526 11.3% - 0s H 0 0 46.0000000 50.10526 8.92% - 0s 0 0 49.90566 0 112 46.00000 49.90566 8.49% - 0s 0 0 49.74571 0 114 46.00000 49.74571 8.14% - 0s 0 0 49.56459 0 114 46.00000 49.56459 7.75% - 0s 0 0 49.47794 0 114 46.00000 49.47794 7.56% - 0s 0 0 49.41866 0 113 46.00000 49.41866 7.43% - 0s 0 0 49.36872 0 114 46.00000 49.36872 7.32% - 0s 0 0 49.36872 0 114 46.00000 49.36872 7.32% - 0s 0 2 49.34923 0 114 46.00000 49.34923 7.28% - 0s * 38 7 7 47.0000000 48.78961 3.81% 25.8 0s Cutting planes: Gomory: 3 Zero half: 83 Explored 54 nodes (1986 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%