Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:10:54 2012 Optimize a model with 31433 rows, 34782 columns and 128152 nonzeros Presolve removed 33 rows and 5768 columns Presolve time: 0.71s Presolved: 31400 rows, 29014 columns, 122048 nonzeros Variable types: 0 continuous, 29014 integer (29014 binary) Found heuristic solution: objective 186.0000000 Root relaxation: objective 2.000000e+00, 20353 iterations, 1.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 270 186.00000 2.00000 98.9% - 4s H 0 0 126.0000000 2.00000 98.4% - 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: 1 Zero half: 19 Explored 0 nodes (66277 simplex iterations) in 4.72 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%