Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:40:18 2012 Optimize a model with 3403 rows, 6972 columns and 16849 nonzeros Presolve removed 26 rows and 2158 columns Presolve time: 0.10s Presolved: 3377 rows, 4814 columns, 14691 nonzeros Variable types: 0 continuous, 4814 integer (4814 binary) Found heuristic solution: objective 18.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3139 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 (3139 simplex iterations) in 0.15 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%