Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:15:11 2012 Optimize a model with 36090 rows, 35156 columns and 142492 nonzeros Presolve removed 23 rows and 3929 columns Presolve time: 0.80s Presolved: 36067 rows, 31227 columns, 138179 nonzeros Variable types: 0 continuous, 31227 integer (31227 binary) Found heuristic solution: objective 187.0000000 Root relaxation: objective 2.000000e+00, 21754 iterations, 1.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 310 187.00000 2.00000 98.9% - 5s H 0 0 161.0000000 2.00000 98.8% - 5s H 0 0 4.0000000 2.00000 50.0% - 5s H 0 0 3.0000000 2.00000 33.3% - 5s Cutting planes: Zero half: 1 Explored 0 nodes (74773 simplex iterations) in 5.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 2.000000000000e+00, gap 33.3333%