Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:59:37 2013

Optimize a model with 44352 rows, 43692 columns and 174372 nonzeros
Presolve removed 66 rows and 0 columns
Presolve time: 0.19s
Presolved: 44286 rows, 43692 columns, 174306 nonzeros
Variable types: 43626 continuous, 66 integer (66 binary)

Root relaxation: objective 5.251380e+04, 4527 iterations, 2.23 seconds

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

     0     0 52513.7999    0   45          - 52513.7999     -      -    2s
H    0     0                    73471.000000 52513.7999  28.5%     -    4s
H    0     0                    66551.000000 52513.7999  21.1%     -   12s
     0     0 60351.8463    0   19 66551.0000 60351.8463  9.31%     -   16s
     0     0 63635.3531    0    6 66551.0000 63635.3531  4.38%     -   18s
     0     0 63642.9901    0    3 66551.0000 63642.9901  4.37%     -   18s
H    0     0                    65449.637864 63642.9901  2.76%     -   18s
H    0     0                    64793.000000 63642.9901  1.77%     -   18s
H    0     0                    64518.000000 63642.9901  1.36%     -   19s
     0     2 63643.3646    0    3 64518.0000 63643.3646  1.36%     -   19s
     1     3 63814.3463    1    3 64518.0000 63746.3821  1.20%   354   20s
H    6     4                    64285.833333 63897.0124  0.60%   316   21s
H    7     4                    64190.000000 63897.0124  0.46%   299   21s
*    8     3               6    64122.000000 63897.0124  0.35%   278   21s

Cutting planes:
  Implied bound: 56

Explored 16 nodes (12341 simplex iterations) in 21.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.412200000000e+04, best bound 6.412200000000e+04, gap 0.0%