Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:38:33 2012 Optimize a model with 1631 rows, 4692 columns and 9246 nonzeros Presolve removed 32 rows and 2042 columns Presolve time: 0.10s Presolved: 1599 rows, 2650 columns, 7158 nonzeros Variable types: 0 continuous, 2650 integer (2650 binary) Found heuristic solution: objective 68.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.11 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%