Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:39 2012 Optimize a model with 1655 rows, 342 columns and 5218 nonzeros Presolve removed 1100 rows and 2 columns Presolve time: 0.03s Presolved: 573 rows, 340 columns, 3536 nonzeros Variable types: 0 continuous, 340 integer (340 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 6.000000e+00, 669 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 6.00000 0 26 18.00000 6.00000 66.7% - 0s H 0 0 8.0000000 6.00000 25.0% - 0s * 0 0 0 6.0000000 6.00000 0.0% - 0s Cutting planes: Gomory: 3 Zero half: 6 Explored 0 nodes (1867 simplex iterations) in 0.11 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%