Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:41:01 2012 Optimize a model with 3828 rows, 7656 columns and 18792 nonzeros Presolve removed 33 rows and 2871 columns Presolve time: 0.12s Presolved: 3795 rows, 4785 columns, 15921 nonzeros Variable types: 0 continuous, 4785 integer (4785 binary) Found heuristic solution: objective 23.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3038 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 (3038 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%