Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:48:34 2012 Optimize a model with 27744 rows, 32220 columns and 114558 nonzeros Presolve removed 39 rows and 6625 columns Presolve time: 0.60s Presolved: 27705 rows, 25595 columns, 107625 nonzeros Variable types: 0 continuous, 25595 integer (25595 binary) Found heuristic solution: objective 179.0000000 Root relaxation: objective 2.000000e+00, 18569 iterations, 1.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 256 179.00000 2.00000 98.9% - 3s H 0 0 53.0000000 2.00000 96.2% - 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% - 4s Cutting planes: Gomory: 3 Zero half: 12 Explored 0 nodes (62971 simplex iterations) in 4.06 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%