Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:21:57 2012 Optimize a model with 59051 rows, 49506 columns and 225550 nonzeros Presolve removed 907 rows and 3776 columns Presolve time: 1.43s Presolved: 58144 rows, 45730 columns, 219032 nonzeros Variable types: 0 continuous, 45730 integer (45730 binary) Found heuristic solution: objective 222.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 381 iterations, 0.03 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 (381 simplex iterations) in 1.61 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%