Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:59 2012 Optimize a model with 1899 rows, 420 columns and 6018 nonzeros Presolve removed 1062 rows and 2 columns Presolve time: 0.05s Presolved: 837 rows, 418 columns, 4154 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 5.000000e+00, 1600 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 143 20.00000 5.00000 75.0% - 0s H 0 0 18.0000000 5.00000 72.2% - 0s H 0 0 17.0000000 5.00000 70.6% - 0s 0 0 5.00000 0 180 17.00000 5.00000 70.6% - 0s H 0 0 16.0000000 5.00000 68.8% - 0s H 0 0 14.0000000 5.00000 64.3% - 0s H 0 0 12.0000000 5.00000 58.3% - 0s 0 0 5.00000 0 45 12.00000 5.00000 58.3% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 73 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 41 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 48 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 26 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 58 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 60 6.00000 5.00000 16.7% - 1s 0 0 5.00000 0 58 6.00000 5.00000 16.7% - 1s 0 2 5.00000 0 50 6.00000 5.00000 16.7% - 1s Cutting planes: Gomory: 6 Clique: 8 Zero half: 26 Explored 23 nodes (21380 simplex iterations) in 1.98 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%