Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:59:05 2013

Optimize a model with 1600 rows, 76750 columns and 650950 nonzeros
Presolve removed 50 rows and 1250 columns
Presolve time: 1.28s
Presolved: 1550 rows, 75500 columns, 600950 nonzeros
Variable types: 75050 continuous, 450 integer (450 binary)

Root relaxation: objective 1.749223e+05, 2800 iterations, 0.21 seconds

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

     0     0 174922.321    0   14          - 174922.321     -      -    1s
     0     0 174924.242    0   14          - 174924.242     -      -    2s
     0     0 174924.447    0   14          - 174924.447     -      -    2s
     0     0 174924.681    0   14          - 174924.681     -      -    2s
     0     0 174924.681    0   14          - 174924.681     -      -    3s
     0     0 174924.681    0   14          - 174924.681     -      -    3s
     0     0 174924.732    0   14          - 174924.732     -      -    3s
     0     0 174924.746    0   14          - 174924.746     -      -    4s
     0     0 174924.746    0   14          - 174924.746     -      -    5s
     0     2 174935.919    0   14          - 174935.919     -      -   11s
    99   101 176293.755   98    6          - 174952.419     -   13.0   15s
*  228   201             205    181732.29693 174952.419  3.73%   9.6   18s
H  258   163                    180171.35896 174964.135  2.89%  10.4   19s
H  285   188                    177951.18477 174964.135  1.68%  10.2   19s
H  312   211                    177125.89211 174964.135  1.22%   9.4   19s
   339   237 177125.693  106    3 177125.892 174964.135  1.22%   8.8   20s
H  366   170                    176786.36178 175061.091  0.98%   9.7   20s
H  393   184                    176775.25857 175061.091  0.97%   9.4   21s
*  397   184              52    176775.23203 175061.091  0.97%   9.3   21s
H  420   138                    176290.59972 175065.558  0.69%  10.4   21s
*  442   141              40    176290.54783 175065.558  0.69%  10.1   22s
*  480   164              33    176290.52869 175074.656  0.69%  10.6   22s
*  488   160              41    176289.78307 175074.656  0.69%  10.5   22s
   601   223 175315.941    2   14 176289.783 175113.414  0.67%  12.3   27s
   608   228 176289.544   32   14 176289.783 175113.414  0.67%  12.2   30s
*  638   216              28    176210.47145 175656.026  0.31%  18.8   34s
   643   210 176092.657   15   14 176210.471 175810.589  0.23%  18.9   35s

Cutting planes:
  Flow cover: 6

Explored 651 nodes (17009 simplex iterations) in 36.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.762104714471e+05, best bound 1.762101117990e+05, gap 0.0002%