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

Optimize a model with 35459 rows, 34869 columns and 139299 nonzeros
Presolve removed 2309 rows and 0 columns
Presolve time: 0.21s
Presolved: 33150 rows, 34869 columns, 134681 nonzeros
Variable types: 34810 continuous, 59 integer (59 binary)

Root relaxation: objective 5.591552e+04, 5577 iterations, 0.70 seconds

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

     0     0 55915.5168    0    3          - 55915.5168     -      -    1s
H    0     0                    57414.000000 55915.5168  2.61%     -    1s
     0     0 55917.0335    0    4 57414.0000 55917.0335  2.61%     -    1s
     0     0 55917.3018    0    4 57414.0000 55917.3018  2.61%     -    1s
     0     2 55932.2978    0    4 57414.0000 55932.2978  2.58%     -    2s
H    1     1                    57005.537805 55932.2978  1.88%   0.0    2s
H    2     2                    56675.146341 56038.7608  1.12%   136    2s
H    3     3                    56182.571429 56055.4634  0.23%   174    2s
H    4     4                    56152.000000 56055.4634  0.17%   139    2s
*    6     4               5    56124.000000 56055.4634  0.12%   109    2s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 11 nodes (6423 simplex iterations) in 2.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.612400000000e+04, best bound 5.612400000000e+04, gap 0.0%