Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:07:59 2012 Optimize a model with 506 rows, 506 columns and 1936 nonzeros Presolve removed 2 rows and 44 columns Presolve time: 0.01s Presolved: 504 rows, 462 columns, 1892 nonzeros Variable types: 0 continuous, 462 integer (462 binary) Found heuristic solution: objective 10.0000000 Root relaxation: objective 2.000000e+00, 382 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 36 10.00000 2.00000 80.0% - 0s H 0 0 3.0000000 2.00000 33.3% - 0s 0 0 2.00000 0 61 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 61 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 36 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 36 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 58 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 61 3.00000 2.00000 33.3% - 0s 0 0 2.00000 0 61 3.00000 2.00000 33.3% - 0s 0 2 2.00000 0 61 3.00000 2.00000 33.3% - 0s Cutting planes: Gomory: 3 Zero half: 4 Explored 8 nodes (13736 simplex iterations) in 0.44 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%