Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:01:12 2013

Optimize a model with 45627 rows, 44957 columns and 179627 nonzeros
Presolve removed 1848 rows and 0 columns
Presolve time: 0.26s
Presolved: 43779 rows, 44957 columns, 175931 nonzeros
Variable types: 44890 continuous, 67 integer (67 binary)

Root relaxation: objective 8.030952e+04, 9529 iterations, 1.68 seconds

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

     0     0 80309.5190    0    5          - 80309.5190     -      -    2s
H    0     0                    82948.000000 80309.5190  3.18%     -    2s
     0     0 80335.2171    0    6 82948.0000 80335.2171  3.15%     -    2s
     0     0 80336.2744    0    6 82948.0000 80336.2744  3.15%     -    2s
H    0     0                    82828.000000 80336.2744  3.01%     -    3s
     0     0 80336.4709    0    6 82828.0000 80336.4709  3.01%     -    3s
H    0     0                    81153.817796 80336.4709  1.01%     -    4s
H    0     0                    81043.204674 80336.4709  0.87%     -    4s
H    0     0                    80752.000000 80336.4709  0.51%     -    4s
     0     0 80336.4709    0    5 80752.0000 80336.4709  0.51%     -    5s
     0     0 80336.4709    0    7 80752.0000 80336.4709  0.51%     -    6s
     0     0 80336.5426    0    7 80752.0000 80336.5426  0.51%     -    6s
     0     2 80383.9235    0    7 80752.0000 80383.9235  0.46%     -    7s
*    8     7               6    80690.000000 80582.0622  0.13%   102    8s
*   13     2               5    80651.000000 80650.7143  0.00%  82.0    8s

Cutting planes:
  Gomory: 2
  Flow cover: 8

Explored 14 nodes (14603 simplex iterations) in 8.15 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.065100000000e+04, best bound 8.065071428571e+04, gap 0.0004%