Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:24:00 2013

Optimize a model with 51191 rows, 50481 columns and 201711 nonzeros
Presolve removed 2148 rows and 0 columns
Presolve time: 0.31s
Presolved: 49043 rows, 50481 columns, 197415 nonzeros
Variable types: 50410 continuous, 71 integer (71 binary)

Root relaxation: objective 8.062671e+04, 11040 iterations, 1.94 seconds

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

     0     0 80626.7086    0    3          - 80626.7086     -      -    2s
H    0     0                    80843.000000 80626.7086  0.27%     -    2s
     0     0 80626.7892    0    4 80843.0000 80626.7892  0.27%     -    2s
     0     0 80626.7892    0    4 80843.0000 80626.7892  0.27%     -    3s
     0     0 80637.5976    0    3 80843.0000 80637.5976  0.25%     -    3s
     0     0 80637.5976    0    2 80843.0000 80637.5976  0.25%     -    6s
     0     0 80637.7906    0    3 80843.0000 80637.7906  0.25%     -    6s
     0     0 80638.7268    0    3 80843.0000 80638.7268  0.25%     -    7s
     0     2 80639.0661    0    3 80843.0000 80639.0661  0.25%     -    7s
*    4     3               3    80747.000000 80721.0000  0.03%   164    7s
*    6     0               2    80721.000000 80721.0000   0.0%   114    7s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 7 nodes (15709 simplex iterations) in 7.92 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.072100000000e+04, best bound 8.072100000000e+04, gap 0.0%