Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:37:01 2013 Optimize a model with 2200 rows, 103800 columns and 214900 nonzeros Presolve removed 100 rows and 1300 columns Presolve time: 0.31s Presolved: 2100 rows, 102500 columns, 212900 nonzeros Variable types: 102100 continuous, 400 integer (400 binary) Root relaxation: objective 8.258498e+05, 5309 iterations, 0.40 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 825849.833 0 2 - 825849.833 - - 0s H 0 0 834265.22341 825849.833 1.01% - 0s 0 0 825859.486 0 2 834265.223 825859.486 1.01% - 1s 0 0 825859.486 0 2 834265.223 825859.486 1.01% - 1s 0 0 825861.516 0 2 834265.223 825861.516 1.01% - 1s 0 0 825870.644 0 2 834265.223 825870.644 1.01% - 1s 0 0 825874.932 0 2 834265.223 825874.932 1.01% - 2s 0 0 825874.932 0 2 834265.223 825874.932 1.01% - 2s 0 0 825874.932 0 2 834265.223 825874.932 1.01% - 2s 0 0 825874.932 0 2 834265.223 825874.932 1.01% - 2s 0 0 825874.932 0 2 834265.223 825874.932 1.01% - 3s 0 0 825874.932 0 2 834265.223 825874.932 1.01% - 3s 0 2 825888.833 0 2 834265.223 825888.833 1.00% - 4s * 5 3 5 826102.66657 825989.224 0.01% 120 4s Cutting planes: Flow cover: 9 Explored 8 nodes (7756 simplex iterations) in 5.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.261026665679e+05, best bound 8.261026665679e+05, gap 0.0%