Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:57:17 2012 Optimize a model with 6634 rows, 11556 columns and 31030 nonzeros Presolve removed 251 rows and 3959 columns Presolve time: 0.15s Presolved: 6383 rows, 7597 columns, 26536 nonzeros Variable types: 0 continuous, 7597 integer (7597 binary) Found heuristic solution: objective 33.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 6565 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (6565 simplex iterations) in 0.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%