Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:30 2013

Optimize a model with 21712 rows, 21252 columns and 84732 nonzeros
Presolve removed 46 rows and 0 columns
Presolve time: 0.09s
Presolved: 21666 rows, 21252 columns, 84686 nonzeros
Variable types: 21206 continuous, 46 integer (46 binary)

Root relaxation: objective 4.022254e+04, 2454 iterations, 0.57 seconds

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

     0     0 40222.5436    0   39          - 40222.5436     -      -    0s
H    0     0                    52844.000000 40222.5436  23.9%     -    1s
     0     0 46644.9609    0    7 52844.0000 46644.9609  11.7%     -    2s
H    0     0                    48948.217812 46644.9609  4.71%     -    2s
H    0     0                    47200.000000 46644.9609  1.18%     -    2s
     0     0 46725.2313    0    5 47200.0000 46725.2313  1.01%     -    2s
     0     2 46726.1492    0    5 47200.0000 46726.1492  1.00%     -    3s
H    2     2                    47001.000000 46793.4007  0.44%  76.0    3s
H    9     6                    46956.612903 46849.5000  0.23%   117    3s
*   10     5               6    46939.000000 46849.5000  0.19%   112    3s
*   11     1               2    46853.000000 46852.0000  0.00%   103    3s

Cutting planes:
  Implied bound: 42

Explored 12 nodes (5679 simplex iterations) in 3.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.685300000000e+04, best bound 4.685200000000e+04, gap 0.0021%