Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:40:25 2012 Optimize a model with 3528 rows, 7140 columns and 17388 nonzeros Presolve removed 30 rows and 2520 columns Presolve time: 0.11s Presolved: 3498 rows, 4620 columns, 14868 nonzeros Variable types: 0 continuous, 4620 integer (4620 binary) Found heuristic solution: objective 25.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 2866 iterations, 0.04 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 (2866 simplex iterations) in 0.15 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%