Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:20:42 2012 Optimize a model with 55721 rows, 49506 columns and 215560 nonzeros Presolve removed 911 rows and 4664 columns Presolve time: 1.42s Presolved: 54810 rows, 44842 columns, 208184 nonzeros Variable types: 0 continuous, 44842 integer (44842 binary) Found heuristic solution: objective 222.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 345 iterations, 0.04 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 (345 simplex iterations) in 1.59 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%