Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:10:58 2012 Optimize a model with 12827 rows, 16256 columns and 54229 nonzeros Presolve removed 284 rows and 3810 columns Presolve time: 0.26s Presolved: 12543 rows, 12446 columns, 49784 nonzeros Variable types: 0 continuous, 12446 integer (12446 binary) Found heuristic solution: objective 41.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: cutoff, 15185 iterations, 1.20 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 (15185 simplex iterations) in 1.49 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%