Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:19:04 2012 Optimize a model with 37599 rows, 35532 columns and 147390 nonzeros Presolve removed 775 rows and 3950 columns Presolve time: 0.97s Presolved: 36824 rows, 31582 columns, 141170 nonzeros Variable types: 0 continuous, 31582 integer (31582 binary) Found heuristic solution: objective 188.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 288 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 (288 simplex iterations) in 1.07 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%