Gurobi 5.0.1 (linux64) logging started Fri Nov 16 23:10:55 2012 Optimize a model with 37421 rows, 39402 columns and 150676 nonzeros Presolve removed 425 rows and 5348 columns Presolve time: 0.91s Presolved: 36996 rows, 34054 columns, 143966 nonzeros Variable types: 0 continuous, 34054 integer (34054 binary) Found heuristic solution: objective 198.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 297 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% - 1s Explored 0 nodes (297 simplex iterations) in 1.02 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%