Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:41:04 2012 Optimize a model with 3914 rows, 7656 columns and 18964 nonzeros Presolve removed 35 rows and 2873 columns Presolve time: 0.12s Presolved: 3879 rows, 4783 columns, 16003 nonzeros Variable types: 0 continuous, 4783 integer (4783 binary) Found heuristic solution: objective 87.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.13 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%