Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:14:14 2013

Optimize a model with 20140 rows, 21020 columns and 82010 nonzeros
Presolve removed 30 rows and 20 columns
Presolve time: 0.28s
Presolved: 20110 rows, 21000 columns, 61980 nonzeros
Variable types: 11010 continuous, 9990 integer (9990 binary)

Root relaxation: objective 1.997658e+04, 7606 iterations, 0.31 seconds

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

     0     0 19976.5790    0    2          - 19976.5790     -      -    0s
H    0     0                    20893.171375 19976.5790  4.39%     -    1s
     0     0 20063.0045    0    4 20893.1714 20063.0045  3.97%     -    2s
     0     0 20096.6560    0    4 20893.1714 20096.6560  3.81%     -    2s
     0     0 20096.8162    0    5 20893.1714 20096.8162  3.81%     -    2s
     0     0 20106.0418    0    4 20893.1714 20106.0418  3.77%     -    2s
H    0     0                    20159.089909 20106.0418  0.26%     -    3s
     0     0 20106.0418    0    2 20159.0899 20106.0418  0.26%     -    4s
     0     0 20106.0418    0    4 20159.0899 20106.0418  0.26%     -    4s
     0     0 20106.0418    0    4 20159.0899 20106.0418  0.26%     -    4s
     0     0 20106.0608    0    4 20159.0899 20106.0608  0.26%     -    4s
     0     0 20106.0798    0    3 20159.0899 20106.0798  0.26%     -    4s
     0     2 20106.2757    0    3 20159.0899 20106.2757  0.26%     -    4s
    91    93 20129.7145   91    3 20159.0899 20129.7145  0.15%   1.0    5s
   601   512 20149.3069  268    4 20159.0899 20141.0411  0.09%   3.2   11s
   910   513 20153.1633  157    4 20159.0899 20152.3528  0.03%   9.7   15s
  5055  1284     cutoff  108      20159.0899 20154.9084  0.02%   5.5   20s
H 7372  2026                    20158.716559 20155.4869  0.02%   5.0   21s
 10665  2467     cutoff  422      20158.7166 20155.9995  0.01%   5.5   25s
H10767  2381                    20158.677414 20156.0284  0.01%   5.5   25s
*11461  2351              78    20158.640601 20156.1439  0.01%   5.7   25s
*11519  2252              80    20158.556914 20156.1679  0.01%   5.8   26s
*11575  2183              81    20158.536207 20156.1917  0.01%   5.9   26s

Cutting planes:
  Gomory: 3
  Cover: 1
  Flow cover: 2

Explored 13676 nodes (95128 simplex iterations) in 28.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.015853620692e+04, best bound 2.015652041799e+04, gap 0.0100%