Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:18:35 2012 Optimize a model with 12420 rows, 18360 columns and 55080 nonzeros Presolve removed 303 rows and 4455 columns Presolve time: 0.24s Presolved: 12117 rows, 13905 columns, 49950 nonzeros Variable types: 0 continuous, 13905 integer (13905 binary) Found heuristic solution: objective 46.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 14842 iterations, 0.81 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (14842 simplex iterations) in 1.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%