Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:17:37 2012 Optimize a model with 4988 rows, 3422 columns and 18154 nonzeros Presolve removed 350 rows and 116 columns Presolve time: 0.11s Presolved: 4638 rows, 3306 columns, 17168 nonzeros Variable types: 0 continuous, 3306 integer (3306 binary) Found heuristic solution: objective 29.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 4441 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 (4441 simplex iterations) in 0.38 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%