Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:07:11 2012 Optimize a model with 2039 rows, 420 columns and 6438 nonzeros Presolve removed 1242 rows and 2 columns Presolve time: 0.05s Presolved: 817 rows, 418 columns, 4918 nonzeros Variable types: 0 continuous, 418 integer (418 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 5.000000e+00, 1042 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 5.00000 0 66 20.00000 5.00000 75.0% - 0s H 0 0 16.0000000 5.00000 68.8% - 0s H 0 0 8.0000000 5.00000 37.5% - 0s 0 0 5.09677 0 124 8.00000 5.09677 36.3% - 0s H 0 0 7.0000000 5.09677 27.2% - 0s 0 0 5.09677 0 201 7.00000 5.09677 27.2% - 0s H 0 0 6.0000000 5.09677 15.1% - 0s Cutting planes: Gomory: 1 Zero half: 3 Explored 0 nodes (2763 simplex iterations) in 0.25 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%