Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:52:38 2013

Optimize a model with 10320 rows, 24060 columns and 78100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.45s
Presolved: 10300 rows, 24040 columns, 68080 nonzeros
Variable types: 14040 continuous, 10000 integer (10000 binary)

Root relaxation: objective 4.370285e+04, 713 iterations, 0.07 seconds

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

     0     0 43702.8549    0    4          - 43702.8549     -      -    1s
     0     0 43735.9943    0    2          - 43735.9943     -      -    1s
     0     0 43738.6160    0    2          - 43738.6160     -      -    1s
     0     0 43738.6160    0    2          - 43738.6160     -      -    2s
     0     2 43738.6160    0    2          - 43738.6160     -      -    3s
*   30    20              15    44224.140611 43852.1529  0.84%  19.1    4s
*   53    16              12    44051.546797 43878.1255  0.39%  13.8    4s
*   75     7              13    43900.868871 43896.9453  0.01%  11.2    4s

Cutting planes:
  Gomory: 3
  Implied bound: 20
  Flow cover: 3

Explored 76 nodes (1887 simplex iterations) in 4.74 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390086887068e+04, best bound 4.389694531587e+04, gap 0.0089%