Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:19:14 2012 Optimize a model with 34027 rows, 35532 columns and 136674 nonzeros Presolve removed 23 rows and 3950 columns Presolve time: 0.74s Presolved: 34004 rows, 31582 columns, 132364 nonzeros Variable types: 0 continuous, 31582 integer (31582 binary) Found heuristic solution: objective 188.0000000 Root relaxation: objective 2.000000e+00, 22452 iterations, 1.53 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 276 188.00000 2.00000 98.9% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.20000 0 360 4.00000 2.20000 45.0% - 9s H 0 0 3.0000000 2.20000 26.7% - 9s Cutting planes: Gomory: 1 Zero half: 5 Explored 0 nodes (80825 simplex iterations) in 9.30 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%