Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:27:51 2012 Optimize a model with 27691 rows, 29756 columns and 111970 nonzeros Presolve removed 371 rows and 4302 columns Presolve time: 0.66s Presolved: 27320 rows, 25454 columns, 106492 nonzeros Variable types: 0 continuous, 25454 integer (25454 binary) Found heuristic solution: objective 172.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 249 iterations, 0.01 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% - 0s Explored 0 nodes (249 simplex iterations) in 0.74 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%