Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:02:38 2012 Optimize a model with 6554 rows, 12882 columns and 32092 nonzeros Presolve removed 40 rows and 4520 columns Presolve time: 0.15s Presolved: 6514 rows, 8362 columns, 27572 nonzeros Variable types: 0 continuous, 8362 integer (8362 binary) Found heuristic solution: objective 28.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 4900 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 2.00000 1.00000 50.0% - 0s Explored 0 nodes (4900 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%