Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:38:04 2013

Optimize a model with 54093 rows, 53363 columns and 213233 nonzeros
Presolve removed 5812 rows and 0 columns
Presolve time: 0.33s
Presolved: 48281 rows, 53363 columns, 201609 nonzeros
Variable types: 53290 continuous, 73 integer (73 binary)

Root relaxation: objective 8.253304e+04, 9905 iterations, 1.73 seconds

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

     0     0 82533.0357    0    3          - 82533.0357     -      -    2s
H    0     0                    83104.000000 82533.0357  0.69%     -    2s
     0     0 82535.0288    0    4 83104.0000 82535.0288  0.68%     -    2s
     0     0 82535.0288    0    4 83104.0000 82535.0288  0.68%     -    3s
     0     0 82535.0288    0    3 83104.0000 82535.0288  0.68%     -    6s
     0     0 82535.0383    0    4 83104.0000 82535.0383  0.68%     -    6s
     0     0 82535.0383    0    4 83104.0000 82535.0383  0.68%     -    6s
     0     2 82539.1071    0    4 83104.0000 82539.1071  0.68%     -    7s
H    4     3                    83025.000000 82670.2917  0.43%   148    8s
H    7     5                    82918.200000 82670.2917  0.30%   105    8s
*   19     6              19    82754.000000 82670.2917  0.10%  67.9    8s
H   27     5                    82737.000000 82690.7414  0.06%  64.6    9s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 34 nodes (17549 simplex iterations) in 9.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.273700000000e+04, best bound 8.272900000000e+04, gap 0.0097%