Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:43:05 2012 Optimize a model with 4464 rows, 8742 columns and 21762 nonzeros Presolve removed 27 rows and 2511 columns Presolve time: 0.12s Presolved: 4437 rows, 6231 columns, 19251 nonzeros Variable types: 0 continuous, 6231 integer (6231 binary) Found heuristic solution: objective 22.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3683 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 (3683 simplex iterations) in 0.18 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%