Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:15:05 2012 Optimize a model with 54483 rows, 45156 columns and 207546 nonzeros Presolve removed 872 rows and 4666 columns Presolve time: 3.77s Presolved: 53611 rows, 40490 columns, 200256 nonzeros Variable types: 0 continuous, 40490 integer (40490 binary) Found heuristic solution: objective 212.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 325 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% - 3s Explored 0 nodes (325 simplex iterations) in 3.92 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%