Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:45:41 2012 Optimize a model with 58319 rows, 46872 columns and 220750 nonzeros Presolve removed 1317 rows and 4106 columns Presolve time: 4.22s Presolved: 57002 rows, 42766 columns, 212878 nonzeros Variable types: 0 continuous, 42766 integer (42766 binary) Found heuristic solution: objective 216.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 379 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% - 4s Explored 0 nodes (379 simplex iterations) in 4.39 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%