Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:47:23 2013

Optimize a model with 680 rows, 24260 columns and 248680 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.46s
Presolved: 660 rows, 24240 columns, 228660 nonzeros
Variable types: 24040 continuous, 200 integer (200 binary)

Root relaxation: objective 4.370285e+04, 617 iterations, 0.04 seconds

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

     0     0 43702.8549    0    6          - 43702.8549     -      -    0s
     0     0 43703.1531    0    6          - 43703.1531     -      -    1s
     0     0 43703.1662    0    7          - 43703.1662     -      -    1s
     0     0 43703.1662    0    7          - 43703.1662     -      -    1s
     0     0 43703.1662    0    7          - 43703.1662     -      -    1s
     0     0 43703.1724    0    7          - 43703.1724     -      -    1s
     0     0 43703.1753    0    7          - 43703.1753     -      -    1s
     0     0 43703.1770    0    7          - 43703.1770     -      -    1s
     0     0 43703.1770    0    7          - 43703.1770     -      -    2s
     0     2 43704.0259    0    7          - 43704.0259     -      -    5s
*   16    10              15    44045.009140 43706.9897  0.77%  15.2    5s
*   36    16              16    44042.771508 43752.6678  0.66%  11.9    5s
H   54    18                    43947.840730 43787.7839  0.36%   9.7    5s
*  135    11              25    43927.443484 43900.5733  0.06%   9.8    6s
*  141    11              26    43911.597800 43900.5733  0.03%   9.5    6s
*  157     9              20    43900.896687 43900.6783  0.00%   8.8    6s

Cutting planes:
  Flow cover: 10

Explored 158 nodes (2577 simplex iterations) in 6.65 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390089668710e+04, best bound 4.390067829210e+04, gap 0.0005%