Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:39 2012 Optimize a model with 1619 rows, 342 columns and 5110 nonzeros Presolve removed 992 rows and 2 columns Presolve time: 0.03s Presolved: 645 rows, 340 columns, 3744 nonzeros Variable types: 0 continuous, 340 integer (340 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 5.000000e+00, 1016 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 98 18.00000 5.00000 72.2% - 0s H 0 0 15.0000000 5.00000 66.7% - 0s H 0 0 9.0000000 5.00000 44.4% - 0s 0 0 5.00000 0 154 9.00000 5.00000 44.4% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s 0 0 5.00000 0 83 8.00000 5.00000 37.5% - 0s H 0 0 7.0000000 5.00000 28.6% - 0s 0 0 5.00000 0 70 7.00000 5.00000 28.6% - 0s H 0 0 6.0000000 5.00000 16.7% - 0s 0 0 5.00000 0 30 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 54 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 57 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 36 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 65 6.00000 5.00000 16.7% - 0s 0 0 5.00000 0 65 6.00000 5.00000 16.7% - 0s 0 2 5.00000 0 52 6.00000 5.00000 16.7% - 0s Cutting planes: Gomory: 34 Clique: 19 Zero half: 13 Explored 7 nodes (16648 simplex iterations) in 1.45 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%