Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:29:49 2013 Optimize a model with 2800 rows, 126500 columns and 401500 nonzeros Presolve removed 100 rows and 5700 columns Presolve time: 0.56s Presolved: 2700 rows, 120800 columns, 381500 nonzeros Variable types: 120100 continuous, 700 integer (700 binary) Root relaxation: objective 8.258498e+05, 7016 iterations, 0.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 825849.833 0 4 - 825849.833 - - 1s H 0 0 868999.07072 825849.833 4.97% - 1s 0 0 825852.813 0 4 868999.071 825852.813 4.97% - 2s 0 0 825852.813 0 4 868999.071 825852.813 4.97% - 2s 0 0 825853.910 0 4 868999.071 825853.910 4.96% - 2s 0 0 825856.515 0 4 868999.071 825856.515 4.96% - 3s 0 0 825856.731 0 4 868999.071 825856.731 4.96% - 3s 0 0 825859.144 0 4 868999.071 825859.144 4.96% - 4s 0 0 825859.322 0 4 868999.071 825859.322 4.96% - 4s 0 0 825859.541 0 4 868999.071 825859.541 4.96% - 4s 0 0 825861.782 0 4 868999.071 825861.782 4.96% - 5s 0 0 825861.912 0 4 868999.071 825861.912 4.96% - 5s 0 0 825862.086 0 4 868999.071 825862.086 4.96% - 6s 0 0 825862.092 0 4 868999.071 825862.092 4.96% - 6s 0 0 825862.143 0 4 868999.071 825862.143 4.96% - 6s 0 0 825862.212 0 4 868999.071 825862.212 4.96% - 7s 0 0 825862.212 0 4 868999.071 825862.212 4.96% - 8s 0 2 825864.195 0 4 868999.071 825864.195 4.96% - 9s 5 7 825967.350 5 6 868999.071 825912.195 4.96% 126 10s * 13 8 13 826102.66657 825912.195 0.02% 73.9 12s Cutting planes: Flow cover: 10 Explored 19 nodes (11976 simplex iterations) in 12.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.261026665679e+05, best bound 8.260326241790e+05, gap 0.0085%