Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:38:39 2013

Optimize a model with 54093 rows, 53363 columns and 213233 nonzeros
Presolve removed 2727 rows and 0 columns
Presolve time: 0.33s
Presolved: 51366 rows, 53363 columns, 207779 nonzeros
Variable types: 53290 continuous, 73 integer (73 binary)

Root relaxation: objective 8.267179e+04, 10692 iterations, 2.06 seconds

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

     0     0 82671.7874    0    2          - 82671.7874     -      -    2s
H    0     0                    83316.000000 82671.7874  0.77%     -    2s
     0     0 82673.9693    0    3 83316.0000 82673.9693  0.77%     -    3s
     0     0 82673.9693    0    2 83316.0000 82673.9693  0.77%     -    6s
     0     0 82673.9693    0    4 83316.0000 82673.9693  0.77%     -    6s
     0     0 82673.9693    0    4 83316.0000 82673.9693  0.77%     -    7s
H    0     0                    82786.000000 82673.9693  0.14%     -    8s
     0     2 82676.4644    0    2 82786.0000 82676.4644  0.13%     -    9s
H    3     1                    82778.000000 82697.0967  0.10%  53.3    9s
*    5     2               3    82760.000000 82697.0967  0.08%   104    9s
*    7     0               2    82754.000000 82754.0000   0.0%  81.7    9s

Cutting planes:
  Gomory: 3
  Flow cover: 2

Explored 8 nodes (16807 simplex iterations) in 9.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.275400000000e+04, best bound 8.275400000000e+04, gap 0.0%