Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:36:59 2013

Optimize a model with 671 rows, 37271 columns and 74481 nonzeros
Presolve time: 0.05s
Presolved: 671 rows, 37271 columns, 74481 nonzeros
Variable types: 37210 continuous, 61 integer (61 binary)

Root relaxation: objective 8.170829e+04, 1754 iterations, 0.06 seconds

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

     0     0 81708.2904    0    5          - 81708.2904     -      -    0s
H    0     0                    83312.000000 81708.2904  1.92%     -    0s
     0     0 81973.7545    0    3 83312.0000 81973.7545  1.61%     -    0s
     0     0 82016.4588    0    3 83312.0000 82016.4588  1.56%     -    0s
H    0     0                    83049.000000 82016.4588  1.24%     -    0s
     0     0 82025.0702    0    2 83049.0000 82025.0702  1.23%     -    0s
     0     0 82028.0052    0    2 83049.0000 82028.0052  1.23%     -    0s
     0     0 82030.1632    0    3 83049.0000 82030.1632  1.23%     -    0s
     0     0 82030.7426    0    2 83049.0000 82030.7426  1.23%     -    0s
     0     0 82031.3415    0    2 83049.0000 82031.3415  1.23%     -    0s
     0     2 82043.0000    0    2 83049.0000 82043.0000  1.21%     -    0s
H    1     1                    82943.708917 82043.0000  1.09%   0.0    0s
H    2     2                    82230.000000 82118.8183  0.14%  88.5    0s
*    7     3               6    82176.000000 82142.2092  0.04%  50.3    0s

Cutting planes:
  Implied bound: 54
  Flow cover: 3

Explored 10 nodes (2411 simplex iterations) in 0.97 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.217600000000e+04, best bound 8.217600000000e+04, gap 0.0%