Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:22 2013

Optimize a model with 2320 rows, 8060 columns and 22100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.14s
Presolved: 2300 rows, 8040 columns, 20080 nonzeros
Variable types: 6040 continuous, 2000 integer (2000 binary)

Root relaxation: objective 4.370285e+04, 597 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    4          - 43702.8549     -      -    0s
     0     0 43727.1141    0    2          - 43727.1141     -      -    0s
     0     0 43729.4502    0    2          - 43729.4502     -      -    0s
     0     0 43729.4502    0    2          - 43729.4502     -      -    0s
     0     0 43729.4502    0    2          - 43729.4502     -      -    0s
     0     2 43729.4502    0    2          - 43729.4502     -      -    0s
*   25    19              13    44223.303273 43852.1529  0.84%  18.8    0s
*   43    15              10    44051.540036 43878.1255  0.39%  14.2    0s
H   55     7                    43933.556345 43896.9453  0.08%  12.2    0s
*   61     6              11    43900.865943 43896.9453  0.01%  11.5    1s

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

Explored 62 nodes (1595 simplex iterations) in 1.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390086594259e+04, best bound 4.389694531587e+04, gap 0.0089%