Gurobi 5.0.1 (linux64) logging started Sat Nov 17 04:50:59 2012 Optimize a model with 58565 rows, 51756 columns and 226317 nonzeros Presolve removed 473 rows and 3861 columns Presolve time: 1.56s Presolved: 58092 rows, 47895 columns, 220811 nonzeros Variable types: 0 continuous, 47895 integer (47895 binary) Found heuristic solution: objective 227.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 355 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 (355 simplex iterations) in 1.73 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%