Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:32:12 2013

Optimize a model with 2200 rows, 103800 columns and 214900 nonzeros
Presolve removed 100 rows and 1300 columns
Presolve time: 0.39s
Presolved: 2100 rows, 102500 columns, 212900 nonzeros
Variable types: 102100 continuous, 400 integer (400 binary)

Root relaxation: objective 8.570461e+05, 6204 iterations, 0.64 seconds

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

     0     0 857046.104    0    2          - 857046.104     -      -    1s
H    0     0                    896638.58028 857046.104  4.42%     -    1s
     0     0 857084.895    0    2 896638.580 857084.895  4.41%     -    1s
     0     0 857098.290    0    2 896638.580 857098.290  4.41%     -    2s
     0     0 857101.918    0    2 896638.580 857101.918  4.41%     -    2s
     0     0 857111.441    0    2 896638.580 857111.441  4.41%     -    2s
     0     0 857115.290    0    2 896638.580 857115.290  4.41%     -    2s
     0     0 857116.267    0    2 896638.580 857116.267  4.41%     -    3s
     0     0 857119.542    0    2 896638.580 857119.542  4.41%     -    3s
     0     0 857119.542    0    2 896638.580 857119.542  4.41%     -    3s
     0     0 857120.223    0    2 896638.580 857120.223  4.41%     -    3s
     0     0 857121.752    0    2 896638.580 857121.752  4.41%     -    3s
     0     0 857123.437    0    2 896638.580 857123.437  4.41%     -    4s
     0     0 857123.524    0    2 896638.580 857123.524  4.41%     -    4s
     0     0 857123.630    0    2 896638.580 857123.630  4.41%     -    4s
     0     0 857123.859    0    2 896638.580 857123.859  4.41%     -    5s
     0     0 857123.859    0    2 896638.580 857123.859  4.41%     -    5s
     0     2 857261.861    0    2 896638.580 857261.861  4.39%     -    5s
    18    20 859031.287   18    5 896638.580 858169.423  4.29%   107   10s
H   27    23                    865225.35908 858169.423  0.82%  82.5   11s
    49    34 860431.945   49    4 865225.359 858169.423  0.82%  64.8   15s
*   80    44              78    863013.62944 858169.423  0.56%  55.8   18s
    86    42 858292.034    2    2 863013.629 858169.837  0.56%  63.4   20s
*  109    22              24    859244.52823 858169.837  0.13%  54.9   23s
   131    31 858738.582   14    2 859244.528 858439.607  0.09%  51.9   25s
*  186    53              15    859243.16836 858685.547  0.06%  46.3   27s
*  202    41              16    859168.59169 858808.219  0.04%  43.5   28s
*  240    14              24    859005.98790 858875.027  0.02%  38.6   29s

Cutting planes:
  Flow cover: 14

Explored 253 nodes (18088 simplex iterations) in 29.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.590059879047e+05, best bound 8.589250225644e+05, gap 0.0094%