Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:12:19 2013 Optimize a model with 69803 rows, 68973 columns and 275643 nonzeros Presolve removed 2492 rows and 0 columns Presolve time: 0.44s Presolved: 67311 rows, 68973 columns, 270659 nonzeros Variable types: 68890 continuous, 83 integer (83 binary) Root relaxation: objective 9.974319e+04, 15904 iterations, 3.70 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 99743.1868 0 2 - 99743.1868 - - 4s H 0 0 100060.00000 99743.1868 0.32% - 4s 0 0 99744.6054 0 3 100060.000 99744.6054 0.32% - 5s 0 0 99744.6054 0 2 100060.000 99744.6054 0.32% - 7s 0 0 99744.7518 0 3 100060.000 99744.7518 0.32% - 7s 0 0 99744.7723 0 3 100060.000 99744.7723 0.32% - 7s 0 2 99752.1250 0 3 100060.000 99752.1250 0.31% - 9s H 6 2 100048.30000 99788.6000 0.26% 50.5 9s H 12 1 99972.000000 99818.7702 0.15% 71.4 9s H 13 1 99960.000000 99866.2273 0.09% 68.5 9s * 14 1 8 99918.000000 99866.2273 0.05% 69.9 9s Cutting planes: Gomory: 1 Flow cover: 4 Explored 20 nodes (22773 simplex iterations) in 9.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.991800000000e+04, best bound 9.991800000000e+04, gap 0.0%