Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:28 2013

Optimize a model with 1280 rows, 7040 columns and 16020 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.07s
Presolved: 1240 rows, 6980 columns, 13960 nonzeros
Variable types: 6000 continuous, 980 integer (980 binary)

Root relaxation: objective 4.370285e+04, 628 iterations, 0.01 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 43717.7839    0    2          - 43717.7839     -      -    0s
     0     0 43719.4767    0    2          - 43719.4767     -      -    0s
     0     0 43728.0896    0    1          - 43728.0896     -      -    0s
     0     0 43728.0896    0    1          - 43728.0896     -      -    0s
     0     0 43728.0896    0    1          - 43728.0896     -      -    0s
     0     0 43728.0896    0    1          - 43728.0896     -      -    0s
H    0     0                    47752.886497 43728.0896  8.43%     -    0s
     0     2 43729.6068    0    1 47752.8865 43729.6068  8.43%     -    0s
H   81    80                    44188.741301 43833.2232  0.80%  10.6    0s
*  108    65             108    44052.747892 43833.2232  0.50%   9.8    0s
H  191   109                    44045.690360 43857.3906  0.43%   7.8    0s
*  202   108              93    44040.331286 43857.3906  0.42%   7.5    0s
*  291    15              11    43900.849511 43877.1384  0.05%   7.1    1s

Cutting planes:
  Gomory: 2
  Flow cover: 9

Explored 311 nodes (3296 simplex iterations) in 1.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390084951135e+04, best bound 4.389672213982e+04, gap 0.0094%