Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:08 2012 Optimize a model with 1999 rows, 420 columns and 6318 nonzeros Presolve removed 1082 rows and 2 columns Presolve time: 0.05s Presolved: 937 rows, 418 columns, 4966 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 5.000000e+00, 1652 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 46 20.00000 5.00000 75.0% - 0s H 0 0 13.0000000 5.00000 61.5% - 0s H 0 0 12.0000000 5.00000 58.3% - 0s 0 0 5.00000 0 262 12.00000 5.00000 58.3% - 0s H 0 0 9.0000000 5.00000 44.4% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 86 7.00000 5.00000 28.6% - 0s 0 0 5.00000 0 94 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 94 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 42 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 70 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 43 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 65 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 64 6.00000 5.00000 16.7% - 1s 0 2 5.00000 0 43 6.00000 5.00000 16.7% - 1s Cutting planes: Gomory: 4 Clique: 13 Zero half: 45 Explored 4 nodes (20331 simplex iterations) in 1.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%