Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:49:27 2013

Optimize a model with 2280 rows, 10040 columns and 24020 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.19s
Presolved: 2240 rows, 9980 columns, 19960 nonzeros
Variable types: 8000 continuous, 1980 integer (1980 binary)

Root relaxation: objective 4.370285e+04, 587 iterations, 0.02 seconds

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

     0     0 43702.8549    0    2          - 43702.8549     -      -    0s
     0     0 43714.1603    0    3          - 43714.1603     -      -    0s
     0     0 43714.5260    0    3          - 43714.5260     -      -    0s
     0     0 43714.8931    0    3          - 43714.8931     -      -    0s
     0     0 43715.5597    0    2          - 43715.5597     -      -    0s
     0     0 43715.5597    0    2          - 43715.5597     -      -    0s
H    0     0                    48257.632398 43715.5597  9.41%     -    0s
     0     2 43717.7776    0    2 48257.6324 43717.7776  9.41%     -    0s
H  162   162                    44256.132926 43852.1529  0.91%  11.1    1s
H  189   171                    44137.385040 43852.1529  0.65%  11.1    1s
*  214   127             214    44052.801317 43852.1529  0.46%  11.3    2s
H  378   222                    44047.933623 43861.0547  0.42%   9.0    2s
*  400   208             182    44040.345983 43861.0547  0.41%   8.6    2s
*  584    35              19    43900.865943 43869.8902  0.07%   7.4    2s

Cutting planes:
  Gomory: 2
  Flow cover: 8

Explored 702 nodes (7196 simplex iterations) in 3.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390086594259e+04, best bound 4.389652632149e+04, gap 0.0099%