Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:17:44 2013 Optimize a model with 3400 rows, 106200 columns and 216100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.64s Presolved: 3200 rows, 105900 columns, 211800 nonzeros Variable types: 104000 continuous, 1900 integer (1900 binary) Root relaxation: objective 8.258498e+05, 7477 iterations, 0.70 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 825849.833 0 1 - 825849.833 - - 1s H 0 0 839634.98396 825849.833 1.64% - 1s 0 0 825858.892 0 1 839634.984 825858.892 1.64% - 1s 0 0 825860.159 0 1 839634.984 825860.159 1.64% - 2s 0 0 825867.554 0 1 839634.984 825867.554 1.64% - 2s 0 0 825870.899 0 1 839634.984 825870.899 1.64% - 2s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 3s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 3s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 3s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 3s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 4s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 4s 0 0 825878.377 0 1 839634.984 825878.377 1.64% - 4s 0 2 825889.195 0 1 839634.984 825889.195 1.64% - 4s 1 3 825961.230 1 1 839634.984 825961.230 1.63% 204 5s * 9 3 9 826102.66657 826102.667 0.0% 62.3 5s Cutting planes: Flow cover: 10 Explored 10 nodes (8499 simplex iterations) in 5.91 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%