Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:48:55 2012 Optimize a model with 4646 rows, 10302 columns and 23836 nonzeros Presolve removed 43 rows and 4343 columns Presolve time: 0.13s Presolved: 4603 rows, 5959 columns, 19493 nonzeros Variable types: 0 continuous, 5959 integer (5959 binary) Found heuristic solution: objective 24.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 4074 iterations, 0.07 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 (4074 simplex iterations) in 0.20 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%