Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:27:47 2012 Optimize a model with 23907 rows, 29756 columns and 100618 nonzeros Presolve removed 37 rows and 6022 columns Presolve time: 0.52s Presolved: 23870 rows, 23734 columns, 94320 nonzeros Variable types: 0 continuous, 23734 integer (23734 binary) Found heuristic solution: objective 172.0000000 Root relaxation: objective 2.000000e+00, 16342 iterations, 0.91 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 188 172.00000 2.00000 98.8% - 3s H 0 0 161.0000000 2.00000 98.8% - 3s H 0 0 4.0000000 2.00000 50.0% - 3s H 0 0 3.0000000 2.00000 33.3% - 3s 0 0 infeasible 0 3.00000 2.00000 33.3% - 3s Cutting planes: Gomory: 1 Zero half: 7 Explored 0 nodes (53610 simplex iterations) in 3.22 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%