Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:43:54 2012 Optimize a model with 4370 rows, 9120 columns and 21850 nonzeros Presolve removed 34 rows and 3230 columns Presolve time: 0.12s Presolved: 4336 rows, 5890 columns, 18620 nonzeros Variable types: 0 continuous, 5890 integer (5890 binary) Found heuristic solution: objective 26.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3514 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 (3514 simplex iterations) in 0.17 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%