Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:40:25 2012 Optimize a model with 3276 rows, 7140 columns and 16632 nonzeros Presolve removed 34 rows and 2856 columns Presolve time: 0.10s Presolved: 3242 rows, 4284 columns, 13776 nonzeros Variable types: 0 continuous, 4284 integer (4284 binary) Found heuristic solution: objective 17.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 2328 iterations, 0.02 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 (2328 simplex iterations) in 0.13 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%