Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:24:52 2012 Optimize a model with 52397 rows, 45582 columns and 201709 nonzeros Presolve removed 870 rows and 3410 columns Presolve time: 1.33s Presolved: 51527 rows, 42172 columns, 195687 nonzeros Variable types: 0 continuous, 42172 integer (42172 binary) Found heuristic solution: objective 213.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 341 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (341 simplex iterations) in 1.48 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%