Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:25:59 2013 Optimize a model with 3600 rows, 104300 columns and 214500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.73s Presolved: 3500 rows, 104200 columns, 212400 nonzeros Variable types: 102200 continuous, 2000 integer (2000 binary) Root relaxation: objective 7.672886e+05, 7720 iterations, 1.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 767288.564 0 6 - 767288.564 - - 2s H 0 0 805668.54398 767288.564 4.76% - 3s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 4s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 5s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 6s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 6s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 7s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 7s 0 0 767328.627 0 4 805668.544 767328.627 4.76% - 8s 0 2 767328.627 0 4 805668.544 767328.627 4.76% - 8s 4 6 769252.248 2 2 805668.544 767812.496 4.70% 360 10s 22 24 768181.640 11 2 805668.544 767812.496 4.70% 169 15s H 27 9 768346.06878 767812.496 0.07% 145 15s Cutting planes: Implied bound: 11 Flow cover: 6 Explored 60 nodes (15229 simplex iterations) in 17.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.683460687757e+05, best bound 7.683460687757e+05, gap 0.0%