Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:29:28 2013

Optimize a model with 3600 rows, 104300 columns and 214500 nonzeros
Presolve removed 100 rows and 100 columns
Presolve time: 0.36s
Presolved: 3500 rows, 104200 columns, 212400 nonzeros
Variable types: 102200 continuous, 2000 integer (2000 binary)

Root relaxation: objective 8.258498e+05, 5633 iterations, 0.54 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     -      -    1s
H    0     0                    839634.98396 825849.833  1.64%     -    1s
     0     0 825858.298    0    2 839634.984 825858.298  1.64%     -    1s
     0     0 825860.446    0    2 839634.984 825860.446  1.64%     -    1s
     0     0 825866.969    0    2 839634.984 825866.969  1.64%     -    2s
     0     0 825871.246    0    2 839634.984 825871.246  1.64%     -    2s
     0     0 825871.246    0    2 839634.984 825871.246  1.64%     -    2s
     0     0 825877.145    0    2 839634.984 825877.145  1.64%     -    2s
     0     0 825878.055    0    2 839634.984 825878.055  1.64%     -    3s
     0     0 825878.880    0    2 839634.984 825878.880  1.64%     -    3s
     0     0 825878.880    0    2 839634.984 825878.880  1.64%     -    3s
     0     2 825878.880    0    2 839634.984 825878.880  1.64%     -    4s
     4     6 825986.656    2    4 839634.984 825986.656  1.63%   274    5s
*    8     6               4    826102.66657 826102.667   0.0%   322    5s

Cutting planes:
  Flow cover: 7

Explored 9 nodes (9722 simplex iterations) in 5.90 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 0.0000%