Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:07:40 2012 Optimize a model with 32744 rows, 34410 columns and 131718 nonzeros Presolve removed 32 rows and 5552 columns Presolve time: 0.74s Presolved: 32712 rows, 28858 columns, 125814 nonzeros Variable types: 0 continuous, 28858 integer (28858 binary) Found heuristic solution: objective 185.0000000 Root relaxation: objective 2.000000e+00, 19931 iterations, 1.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 270 185.00000 2.00000 98.9% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s H 0 0 3.0000000 2.00000 33.3% - 4s 0 0 infeasible 0 3.00000 2.00000 33.3% - 4s Cutting planes: Gomory: 2 Zero half: 28 Explored 0 nodes (66568 simplex iterations) in 4.84 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%