Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:45:33 2012 Optimize a model with 4656 rows, 9506 columns and 23086 nonzeros Presolve removed 35 rows and 3395 columns Presolve time: 0.12s Presolved: 4621 rows, 6111 columns, 19691 nonzeros Variable types: 0 continuous, 6111 integer (6111 binary) Found heuristic solution: objective 22.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3491 iterations, 0.05 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 (3491 simplex iterations) in 0.18 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%