Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:40:11 2012 Optimize a model with 13260 rows, 6162 columns and 45630 nonzeros Presolve removed 1094 rows and 156 columns Presolve time: 0.28s Presolved: 12166 rows, 6006 columns, 42744 nonzeros Variable types: 0 continuous, 6006 integer (6006 binary) Found heuristic solution: objective 46.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 11679 iterations, 2.29 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% - 2s Explored 0 nodes (11679 simplex iterations) in 2.60 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%