Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:01 2012 Optimize a model with 1999 rows, 420 columns and 6318 nonzeros Presolve removed 1082 rows and 2 columns Presolve time: 0.06s Presolved: 917 rows, 418 columns, 4566 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 5.000000e+00, 837 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 103 20.00000 5.00000 75.0% - 0s H 0 0 16.0000000 5.00000 68.8% - 0s H 0 0 10.0000000 5.00000 50.0% - 0s 0 0 5.00000 0 128 10.00000 5.00000 50.0% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s 0 0 5.00000 0 77 8.00000 5.00000 37.5% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 76 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 86 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 63 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 80 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 50 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 79 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 67 6.00000 5.00000 16.7% - 1s 0 2 5.00000 0 67 6.00000 5.00000 16.7% - 1s Cutting planes: Gomory: 2 Clique: 1 Zero half: 2 Explored 8 nodes (25137 simplex iterations) in 2.27 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%