Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:18:00 2013 Optimize a model with 600 rows, 8220 columns and 48560 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.06s Presolved: 580 rows, 8200 columns, 44540 nonzeros Variable types: 8040 continuous, 160 integer (160 binary) Root relaxation: objective 4.013975e+04, 394 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40139.7487 0 6 - 40139.7487 - - 0s 0 0 40139.7487 0 6 - 40139.7487 - - 0s 0 0 40139.7487 0 6 - 40139.7487 - - 0s 0 0 40139.8040 0 6 - 40139.8040 - - 0s 0 0 40139.8040 0 6 - 40139.8040 - - 0s 0 2 40144.0065 0 6 - 40144.0065 - - 0s * 24 8 24 40201.810474 40159.6379 0.10% 8.0 0s * 40 10 14 40195.185018 40169.6809 0.06% 6.7 0s Cutting planes: Flow cover: 3 Explored 44 nodes (1004 simplex iterations) in 0.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.019518501810e+04, best bound 4.019150207407e+04, gap 0.0092%