Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:46:51 2013

Optimize a model with 680 rows, 24260 columns and 248680 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.36s
Presolved: 660 rows, 24240 columns, 228660 nonzeros
Variable types: 24040 continuous, 200 integer (200 binary)

Root relaxation: objective 3.839329e+04, 535 iterations, 0.03 seconds

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

     0     0 38393.2919    0    6          - 38393.2919     -      -    0s
     0     0 38393.5926    0    6          - 38393.5926     -      -    0s
     0     0 38394.0211    0    9          - 38394.0211     -      -    0s
     0     0 38394.1011    0    9          - 38394.1011     -      -    0s
     0     0 38394.1794    0    9          - 38394.1794     -      -    1s
     0     0 38394.3329    0    9          - 38394.3329     -      -    1s
     0     0 38394.3603    0    9          - 38394.3603     -      -    1s
     0     0 38394.3603    0    9          - 38394.3603     -      -    1s
     0     2 38394.7314    0    9          - 38394.7314     -      -    3s
*   39    15              36    38675.527429 38426.1338  0.64%   8.5    3s
*   81    25              39    38637.886159 38454.9004  0.47%   7.2    4s
*   84    21              39    38637.839188 38454.9004  0.47%   7.0    4s
*  106    10              16    38634.722008 38624.9280  0.03%   7.6    4s

Cutting planes:
  Flow cover: 9

Explored 111 nodes (1562 simplex iterations) in 4.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863472200806e+04, best bound 3.863427787291e+04, gap 0.0011%