Gurobi 5.0.1 (linux64) logging started Sat Nov 17 07:54:31 2012 Optimize a model with 64937 rows, 56406 columns and 250033 nonzeros Presolve removed 968 rows and 4268 columns Presolve time: 1.70s Presolved: 63969 rows, 52138 columns, 242857 nonzeros Variable types: 0 continuous, 52138 integer (52138 binary) Found heuristic solution: objective 237.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 399 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 (399 simplex iterations) in 1.91 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%