Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:38:31 2012 Optimize a model with 1428 rows, 4692 columns and 8704 nonzeros Presolve removed 37 rows and 2516 columns Presolve time: 0.04s Presolved: 1391 rows, 2176 columns, 6188 nonzeros Variable types: 0 continuous, 2176 integer (2176 binary) Found heuristic solution: objective 11.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 1281 iterations, 0.01 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 (1281 simplex iterations) in 0.05 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%