Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:55:00 2012 Optimize a model with 6930 rows, 11130 columns and 31500 nonzeros Presolve removed 27 rows and 2835 columns Presolve time: 0.15s Presolved: 6903 rows, 8295 columns, 28665 nonzeros Variable types: 0 continuous, 8295 integer (8295 binary) Found heuristic solution: objective 30.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 5668 iterations, 0.15 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 (5668 simplex iterations) in 0.31 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%