Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:41:03 2012 Optimize a model with 51814 rows, 46440 columns and 200808 nonzeros Presolve removed 452 rows and 4302 columns Presolve time: 1.31s Presolved: 51362 rows, 42138 columns, 194955 nonzeros Variable types: 0 continuous, 42138 integer (42138 binary) Found heuristic solution: objective 215.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 376 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% - 1s Explored 0 nodes (376 simplex iterations) in 1.46 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%