Gurobi 5.0.1 (linux64) logging started Sat Nov 17 05:25:36 2012 Optimize a model with 61787 rows, 52212 columns and 236434 nonzeros Presolve removed 914 rows and 2 columns Presolve time: 1.66s Presolved: 61101 rows, 52210 columns, 285604 nonzeros Variable types: 0 continuous, 52210 integer (52210 binary) Found heuristic solution: objective 228.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 378 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 (378 simplex iterations) in 1.86 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%