Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:36:54 2012 Optimize a model with 73061 rows, 60762 columns and 278716 nonzeros Presolve removed 1990 rows and 5412 columns (presolve time = 5s) ... Presolve removed 1992 rows and 5414 columns Presolve time: 6.16s Presolved: 71069 rows, 55348 columns, 267806 nonzeros Variable types: 0 continuous, 55348 integer (55348 binary) Found heuristic solution: objective 246.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 382 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% - 6s Explored 0 nodes (382 simplex iterations) in 6.37 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%