Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:41:56 2013

Optimize a model with 680 rows, 45200 columns and 528420 nonzeros
Presolve removed 20 rows and 980 columns
Presolve time: 1.31s
Presolved: 660 rows, 44220 columns, 488420 nonzeros
Variable types: 44020 continuous, 200 integer (200 binary)

Root relaxation: objective 3.839329e+04, 588 iterations, 0.05 seconds

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

     0     0 38393.2919    0   16          - 38393.2919     -      -    1s
     0     0 38393.5846    0   16          - 38393.5846     -      -    2s
     0     0 38393.6426    0   15          - 38393.6426     -      -    2s
     0     0 38393.7334    0   16          - 38393.7334     -      -    2s
     0     0 38393.7675    0   16          - 38393.7675     -      -    2s
     0     0 38393.8299    0   16          - 38393.8299     -      -    2s
     0     0 38393.8426    0   15          - 38393.8426     -      -    2s
     0     0 38393.8559    0   16          - 38393.8559     -      -    3s
     0     0 38393.8559    0   16          - 38393.8559     -      -    3s
     0     2 38394.0679    0   16          - 38394.0679     -      -    8s
   136   138 38678.7335  123    8          - 38410.5496     -    4.9   10s
*  192   183             175    40125.462779 38410.5496  4.27%   4.3   10s
H  220    40                    38642.339633 38454.1503  0.49%   4.5   10s
*  231    42              37    38640.117155 38454.1503  0.48%   4.4   11s
H  301    40                    38634.964578 38521.1369  0.29%   5.1   12s
   471    20 38619.4426   28    2 38634.9646 38617.9517  0.04%   6.1   15s

Cutting planes:
  Flow cover: 7

Explored 532 nodes (4178 simplex iterations) in 16.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.863496457846e+04, best bound 3.863142401842e+04, gap 0.0092%