Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:48:31 2012 Optimize a model with 31861 rows, 32220 columns and 126909 nonzeros Presolve removed 751 rows and 5909 columns Presolve time: 0.73s Presolved: 31110 rows, 26311 columns, 118864 nonzeros Variable types: 0 continuous, 26311 integer (26311 binary) Found heuristic solution: objective 179.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 282 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 (282 simplex iterations) in 0.83 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%