Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:43:55 2012 Optimize a model with 29381 rows, 31506 columns and 118765 nonzeros Presolve removed 22 rows and 3542 columns Presolve time: 0.61s Presolved: 29359 rows, 27964 columns, 114893 nonzeros Variable types: 0 continuous, 27964 integer (27964 binary) Found heuristic solution: objective 177.0000000 Root relaxation: objective 2.000000e+00, 20057 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 0 294 177.00000 2.00000 98.9% - 3s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.20000 0 3889 4.00000 2.20000 45.0% - 9s H 0 0 3.0000000 2.20000 26.7% - 10s Cutting planes: Gomory: 2 Zero half: 7 Explored 0 nodes (74872 simplex iterations) in 10.68 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%