Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:52 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 3.573401e+04, 460 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 9 - 35734.0139 - - 0s 0 0 35735.2953 0 9 - 35735.2953 - - 0s 0 0 35735.4622 0 9 - 35735.4622 - - 0s 0 0 35735.8792 0 9 - 35735.8792 - - 0s 0 0 35736.0311 0 9 - 35736.0311 - - 0s 0 0 35736.2088 0 9 - 35736.2088 - - 0s 0 0 35736.2412 0 9 - 35736.2412 - - 0s 0 0 35736.2636 0 9 - 35736.2636 - - 0s 0 0 35736.5645 0 12 - 35736.5645 - - 0s 0 0 35736.5645 0 12 - 35736.5645 - - 0s H 0 0 36269.995408 35736.5645 1.47% - 0s 0 2 35736.5645 0 12 36269.9954 35736.5645 1.47% - 0s * 24 13 22 36255.209165 36003.0448 0.70% 13.8 0s * 26 13 22 36250.482355 36003.0448 0.68% 13.0 0s * 44 6 13 36173.472242 36170.6070 0.01% 12.6 0s Cutting planes: Flow cover: 13 Explored 45 nodes (1471 simplex iterations) in 0.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617347224193e+04, best bound 3.617060695538e+04, gap 0.0079%