Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:40:46 2012 Optimize a model with 40336 rows, 37442 columns and 157486 nonzeros Presolve removed 25 rows and 4441 columns Presolve time: 0.84s Presolved: 40311 rows, 33001 columns, 152629 nonzeros Variable types: 0 continuous, 33001 integer (33001 binary) Found heuristic solution: objective 193.0000000 Root relaxation: objective 2.000000e+00, 23903 iterations, 1.94 seconds Total elapsed time = 5.45s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 336 193.00000 2.00000 99.0% - 6s H 0 0 170.0000000 2.00000 98.8% - 6s H 0 0 4.0000000 2.00000 50.0% - 6s H 0 0 3.0000000 2.00000 33.3% - 6s 0 0 infeasible 0 3.00000 2.00000 33.3% - 6s Cutting planes: Gomory: 2 Zero half: 25 Explored 0 nodes (80842 simplex iterations) in 6.50 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%