Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:54:17 2012 Optimize a model with 12276 rows, 17556 columns and 53856 nonzeros Presolve removed 27 rows and 3564 columns Presolve time: 0.21s Presolved: 12249 rows, 13992 columns, 50292 nonzeros Variable types: 0 continuous, 13992 integer (13992 binary) Found heuristic solution: objective 33.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 9357 iterations, 0.29 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 (9357 simplex iterations) in 0.53 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%