Gurobi 5.0.1 (linux64) logging started Sat Nov 17 04:28:30 2012 Optimize a model with 58081 rows, 51302 columns and 224416 nonzeros Presolve removed 473 rows and 4296 columns Presolve time: 1.49s Presolved: 57608 rows, 47006 columns, 218482 nonzeros Variable types: 0 continuous, 47006 integer (47006 binary) Found heuristic solution: objective 226.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 385 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 (385 simplex iterations) in 1.67 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%