Gurobi 5.0.1 (linux64) logging started Sat Nov 17 06:35:53 2012 Optimize a model with 64217 rows, 53592 columns and 245089 nonzeros Presolve removed 488 rows and 5546 columns Presolve time: 1.67s Presolved: 63729 rows, 48046 columns, 237838 nonzeros Variable types: 0 continuous, 48046 integer (48046 binary) Found heuristic solution: objective 231.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 370 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 (370 simplex iterations) in 1.87 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%