Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:13:40 2013 Optimize a model with 27612 rows, 27092 columns and 108212 nonzeros Presolve removed 1825 rows and 0 columns Presolve time: 0.15s Presolved: 25787 rows, 27092 columns, 104562 nonzeros Variable types: 27040 continuous, 52 integer (52 binary) Root relaxation: objective 6.445926e+04, 6084 iterations, 0.63 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64459.2634 0 2 - 64459.2634 - - 0s H 0 0 65446.000000 64459.2634 1.51% - 0s H 0 0 64660.000000 64459.2634 0.31% - 1s 0 0 64459.4483 0 4 64660.0000 64459.4483 0.31% - 1s 0 0 64459.8027 0 4 64660.0000 64459.8027 0.31% - 1s 0 0 64459.8052 0 4 64660.0000 64459.8052 0.31% - 1s 0 0 64459.8058 0 3 64660.0000 64459.8058 0.31% - 1s 0 0 64459.8058 0 2 64660.0000 64459.8058 0.31% - 2s 0 0 64459.8058 0 3 64660.0000 64459.8058 0.31% - 2s 0 0 64459.9635 0 3 64660.0000 64459.9635 0.31% - 2s 0 0 64459.9635 0 3 64660.0000 64459.9635 0.31% - 2s 0 0 64460.0423 0 3 64660.0000 64460.0423 0.31% - 2s 0 2 64461.6570 0 3 64660.0000 64461.6570 0.31% - 3s Cutting planes: Gomory: 1 Flow cover: 6 Explored 12 nodes (9561 simplex iterations) in 3.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.466000000000e+04, best bound 6.466000000000e+04, gap 0.0%