Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:34:49 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
    6851    6.4835801e+04   6.414062e+01   0.000000e+00      5s
    6897    6.4836586e+04   0.000000e+00   0.000000e+00      5s

Root relaxation: objective 6.483659e+04, 6897 iterations, 5.26 seconds

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

     0     0 64836.5857    0   58          - 64836.5857     -      -    5s
H    0     0                    105653.00000 64836.5857  38.6%     -    9s
     0     0 81987.6908    0   15 105653.000 81987.6908  22.4%     -   17s
H    0     0                    102126.14061 81987.6908  19.7%     -   17s
H    0     0                    91625.000000 81987.6908  10.5%     -   17s
     0     0 84363.8582    0    5 91625.0000 84363.8582  7.92%     -   19s
H    0     0                    88589.429094 84363.8582  4.77%     -   19s
H    0     0                    87044.000000 84363.8582  3.08%     -   19s
H    0     0                    84632.000000 84363.8582  0.32%     -   19s
     0     0 84367.9947    0    3 84632.0000 84367.9947  0.31%     -   20s
     0     2 84372.1671    0    3 84632.0000 84372.1671  0.31%     -   21s

Cutting planes:
  Implied bound: 66

Explored 13 nodes (16949 simplex iterations) in 22.90 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.463200000000e+04, best bound 8.463200000000e+04, gap 0.0%