Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:12 2012 Optimize a model with 264 rows, 105 columns and 528 nonzeros Presolve removed 60 rows and 9 columns Presolve time: 0.00s Presolved: 204 rows, 96 columns, 423 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 4.825000e+01, 123 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48.25000 0 76 40.00000 48.25000 20.6% - 0s H 0 0 43.0000000 48.25000 12.2% - 0s 0 0 47.75000 0 85 43.00000 47.75000 11.0% - 0s 0 0 47.18519 0 91 43.00000 47.18519 9.73% - 0s H 0 0 44.0000000 47.18519 7.24% - 0s 0 0 46.45946 0 89 44.00000 46.45946 5.59% - 0s 0 0 46.20816 0 91 44.00000 46.20816 5.02% - 0s 0 0 45.90909 0 89 44.00000 45.90909 4.34% - 0s 0 0 45.75000 0 81 44.00000 45.75000 3.98% - 0s 0 0 45.75000 0 83 44.00000 45.75000 3.98% - 0s 0 0 45.75000 0 71 44.00000 45.75000 3.98% - 0s 0 2 45.75000 0 71 44.00000 45.75000 3.98% - 0s Cutting planes: Gomory: 1 Zero half: 26 Explored 30 nodes (824 simplex iterations) in 0.04 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%