Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:43:19 2013

Optimize a model with 680 rows, 45200 columns and 528420 nonzeros
Presolve removed 20 rows and 980 columns
Presolve time: 1.64s
Presolved: 660 rows, 44220 columns, 488420 nonzeros
Variable types: 44020 continuous, 200 integer (200 binary)

Root relaxation: objective 4.370285e+04, 692 iterations, 0.06 seconds

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

     0     0 43702.8549    0   16          - 43702.8549     -      -    2s
     0     0 43703.1531    0   16          - 43703.1531     -      -    2s
     0     0 43703.1656    0   16          - 43703.1656     -      -    2s
     0     0 43703.1799    0   16          - 43703.1799     -      -    3s
     0     0 43703.1799    0   16          - 43703.1799     -      -    3s
     0     0 43703.1799    0   16          - 43703.1799     -      -    3s
     0     0 43703.1799    0   16          - 43703.1799     -      -    4s
     0     0 43703.1830    0   16          - 43703.1830     -      -    4s
     0     0 43703.1830    0   16          - 43703.1830     -      -    4s
     0     2 43703.4465    0   16          - 43703.4465     -      -   11s
*  107    68             100    44107.838500 43706.0670  0.91%   5.9   12s
*  150    59              35    44067.470904 43715.6124  0.80%   5.6   12s
H  164    42                    44042.771508 43747.6320  0.67%   6.0   13s
H  191    36                    43900.868905 43753.2255  0.34%   6.2   13s
   313    19 43857.2961    5   19 43900.8689 43852.1602  0.11%   6.6   15s

Cutting planes:
  Flow cover: 9

Explored 351 nodes (4566 simplex iterations) in 15.79 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390086890462e+04, best bound 4.389780219447e+04, gap 0.0070%