Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:40:47 2012 Optimize a model with 32911 rows, 31152 columns and 129006 nonzeros Presolve removed 373 rows and 3346 columns Presolve time: 0.77s Presolved: 32538 rows, 27806 columns, 124412 nonzeros Variable types: 0 continuous, 27806 integer (27806 binary) Found heuristic solution: objective 176.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 296 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% - 0s Explored 0 nodes (296 simplex iterations) in 0.86 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%