Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:11:39 2013

Optimize a model with 69803 rows, 68973 columns and 275643 nonzeros
Presolve removed 5556 rows and 0 columns
Presolve time: 0.45s
Presolved: 64247 rows, 68973 columns, 264531 nonzeros
Variable types: 68890 continuous, 83 integer (83 binary)

Root relaxation: objective 7.978857e+04, 11774 iterations, 2.96 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 79788.5737    0    6          - 79788.5737     -      -    3s
H    0     0                    83926.000000 79788.5737  4.93%     -    3s
H    0     0                    83759.000000 79788.5737  4.74%     -    3s
H    0     0                    80687.000000 79788.5737  1.11%     -    4s
     0     0 79793.9963    0    8 80687.0000 79793.9963  1.11%     -    4s
     0     0 79794.7742    0    8 80687.0000 79794.7742  1.11%     -    5s
     0     0 79794.8216    0    8 80687.0000 79794.8216  1.11%     -    5s
     0     0 79794.8216    0    6 80687.0000 79794.8216  1.11%     -   12s
     0     0 79796.0818    0    8 80687.0000 79796.0818  1.10%     -   12s
     0     0 79796.1085    0    8 80687.0000 79796.1085  1.10%     -   13s
     0     2 79803.3183    0    8 80687.0000 79803.3183  1.10%     -   16s
H    9     8                    80301.000000 79803.3183  0.62%   169   18s
H   13    10                    80291.000000 79803.3183  0.61%   139   18s
H   18    12                    80263.000000 79803.3183  0.57%   109   18s
*   19    11              17    80146.000000 79803.3183  0.43%   109   18s
    32     5 80115.0732    9    1 80146.0000 80113.7073  0.04%   108   20s

Cutting planes:
  Gomory: 3
  Flow cover: 7

Explored 40 nodes (23174 simplex iterations) in 20.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.014600000000e+04, best bound 8.014600000000e+04, gap 0.0%