Gurobi 5.0.1 (linux64) logging started Fri Nov 16 18:11:18 2012 Optimize a model with 8658 rows, 13806 columns and 39312 nonzeros Presolve removed 495 rows and 3159 columns Presolve time: 0.15s Presolved: 8163 rows, 10647 columns, 34983 nonzeros Variable types: 0 continuous, 10647 integer (10647 binary) Found heuristic solution: objective 37.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 9154 iterations, 0.25 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 3.00000 2.00000 33.3% - 0s Explored 0 nodes (9154 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%