Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:34:05 2013

Optimize a model with 52704 rows, 51984 columns and 207504 nonzeros
Presolve removed 72 rows and 0 columns
Presolve time: 0.23s
Presolved: 52632 rows, 51984 columns, 207432 nonzeros
Variable types: 51912 continuous, 72 integer (72 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7070    6.4391398e+04   1.207331e+02   0.000000e+00      5s
    7249    6.4405129e+04   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 6.440513e+04, 7249 iterations, 5.53 seconds

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

     0     0 64405.1292    0   62          - 64405.1292     -      -    6s
H    0     0                    101242.00000 64405.1292  36.4%     -    8s
     0     0 77822.0594    0   13 101242.000 77822.0594  23.1%     -   14s
H    0     0                    97119.063523 77822.0594  19.9%     -   14s
H    0     0                    86202.000000 77822.0594  9.72%     -   15s
     0     0 79819.7078    0    1 86202.0000 79819.7078  7.40%     -   16s
H    0     0                    80855.941558 79819.7078  1.28%     -   16s
H    0     0                    80611.000000 79819.7078  0.98%     -   16s
H    0     0                    80496.000000 79819.7078  0.84%     -   17s
     0     2 79820.5359    0    1 80496.0000 79820.5359  0.84%     -   18s
H    1     1                    80260.000000 79820.5359  0.55%   0.0   18s
H    5     2                    80000.800000 79990.1161  0.01%   165   19s

Cutting planes:
  Implied bound: 70

Explored 7 nodes (14258 simplex iterations) in 19.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000080000000e+04, best bound 7.999300000000e+04, gap 0.0097%