Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:51:50 2012 Optimize a model with 41339 rows, 38220 columns and 161263 nonzeros Presolve removed 20 rows and 3512 columns Presolve time: 0.96s Presolved: 41319 rows, 34708 columns, 157329 nonzeros Variable types: 0 continuous, 34708 integer (34708 binary) Found heuristic solution: objective 195.0000000 Root relaxation: objective 2.000000e+00, 24978 iterations, 1.81 seconds Total elapsed time = 5.39s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 340 195.00000 2.00000 99.0% - 6s H 0 0 171.0000000 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 Clique: 2 Zero half: 22 Explored 0 nodes (85752 simplex iterations) in 6.77 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%