Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:22:50 2012 Optimize a model with 28559 rows, 29070 columns and 113898 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.67s Presolved: 28727 rows, 29068 columns, 142462 nonzeros Variable types: 0 continuous, 29068 integer (29068 binary) Found heuristic solution: objective 170.0000000 Root relaxation: objective 2.000000e+00, 18555 iterations, 1.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 296 170.00000 2.00000 98.8% - 3s H 0 0 133.0000000 2.00000 98.5% - 3s H 0 0 4.0000000 2.00000 50.0% - 3s 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: 20 Explored 0 nodes (59409 simplex iterations) in 4.18 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%