Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:00:01 2013

Optimize a model with 58596 rows, 57836 columns and 231116 nonzeros
Presolve removed 3006 rows and 0 columns
Presolve time: 0.37s
Presolved: 55590 rows, 57836 columns, 225104 nonzeros
Variable types: 57760 continuous, 76 integer (76 binary)

Root relaxation: objective 8.316287e+04, 11842 iterations, 2.42 seconds

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

     0     0 83162.8683    0    3          - 83162.8683     -      -    2s
H    0     0                    84976.000000 83162.8683  2.13%     -    3s
H    0     0                    83651.000000 83162.8683  0.58%     -    3s
     0     0 83163.0493    0    4 83651.0000 83163.0493  0.58%     -    3s
     0     0 83163.0493    0    4 83651.0000 83163.0493  0.58%     -    3s
     0     0 83163.0941    0    4 83651.0000 83163.0941  0.58%     -    4s
     0     0 83163.0941    0    3 83651.0000 83163.0941  0.58%     -    7s
     0     0 83163.0941    0    4 83651.0000 83163.0941  0.58%     -    8s
     0     0 83163.0961    0    4 83651.0000 83163.0961  0.58%     -    8s
     0     2 83163.2618    0    4 83651.0000 83163.2618  0.58%     -    9s
H    5     4                    83398.000000 83289.6758  0.13%   105    9s
     6     4 83316.8358    6    1 83398.0000 83289.6758  0.13%   100   10s
*   14     2               5    83317.000000 83309.0588  0.01%  94.4   10s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 15 nodes (18442 simplex iterations) in 10.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.331700000000e+04, best bound 8.330905882353e+04, gap 0.0095%