Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:08 2012 Optimize a model with 211 rows, 96 columns and 422 nonzeros Presolve removed 74 rows and 19 columns Presolve time: 0.00s Presolved: 137 rows, 77 columns, 287 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 4.650000e+01, 84 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 45 42.00000 46.50000 10.7% - 0s H 0 0 43.0000000 46.50000 8.14% - 0s 0 0 45.75000 0 53 43.00000 45.75000 6.40% - 0s 0 0 45.50000 0 47 43.00000 45.50000 5.81% - 0s 0 0 45.25000 0 48 43.00000 45.25000 5.23% - 0s 0 0 45.04762 0 77 43.00000 45.04762 4.76% - 0s H 0 0 44.0000000 45.04762 2.38% - 0s H 0 0 45.0000000 45.04762 0.11% - 0s Cutting planes: Gomory: 2 Zero half: 10 Explored 0 nodes (206 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%