Gurobi 5.0.1 (linux64) logging started Sat Nov 17 07:41:31 2012 Optimize a model with 64663 rows, 55932 columns and 248742 nonzeros Presolve removed 24 rows and 5194 columns Presolve time: 1.55s Presolved: 64639 rows, 50738 columns, 243002 nonzeros Variable types: 0 continuous, 50738 integer (50738 binary) Found heuristic solution: objective 236.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: objective 2.000000e+00, 498 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 416 3.00000 2.00000 33.3% - 1s Explored 0 nodes (971 simplex iterations) in 1.94 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%