Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:17 2012 Optimize a model with 316 rows, 113 columns and 632 nonzeros Presolve removed 68 rows and 3 columns Presolve time: 0.00s Presolved: 248 rows, 110 columns, 523 nonzeros Variable types: 0 continuous, 110 integer (110 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 4.900000e+01, 167 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.00000 0 76 39.00000 49.00000 25.6% - 0s H 0 0 40.0000000 49.00000 22.5% - 0s 0 0 48.35000 0 105 40.00000 48.35000 20.9% - 0s H 0 0 43.0000000 48.35000 12.4% - 0s 0 0 47.54545 0 106 43.00000 47.54545 10.6% - 0s 0 0 47.20000 0 102 43.00000 47.20000 9.77% - 0s 0 0 46.76923 0 98 43.00000 46.76923 8.77% - 0s 0 0 46.45161 0 108 43.00000 46.45161 8.03% - 0s 0 0 46.22308 0 102 43.00000 46.22308 7.50% - 0s H 0 0 44.0000000 46.22308 5.05% - 0s 0 0 46.13115 0 102 44.00000 46.13115 4.84% - 0s 0 0 46.03226 0 103 44.00000 46.03226 4.62% - 0s 0 0 45.92308 0 101 44.00000 45.92308 4.37% - 0s 0 0 45.87736 0 101 44.00000 45.87736 4.27% - 0s 0 0 45.82609 0 104 44.00000 45.82609 4.15% - 0s 0 0 45.81395 0 103 44.00000 45.81395 4.12% - 0s 0 0 45.80952 0 107 44.00000 45.80952 4.11% - 0s 0 0 45.80952 0 99 44.00000 45.80952 4.11% - 0s 0 2 45.80952 0 98 44.00000 45.80952 4.11% - 0s Cutting planes: Zero half: 73 Explored 48 nodes (1615 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.400000000000e+01, best bound 4.400000000000e+01, gap 0.0%