Gurobi 5.0.1 (linux64) logging started Tue Apr 23 22:02:12 2013

Optimize a model with 100 rows, 2550 columns and 5050 nonzeros
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 100 rows, 2549 columns, 5049 nonzeros
Variable types: 2500 continuous, 49 integer (49 binary)

Root relaxation: objective 6.721690e+05, 49 iterations, 0.00 seconds

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

     0     0 672168.950    0   49          - 672168.950     -      -    0s
H    0     0                    1236571.4500 672168.950  45.6%     -    0s
H    0     0                    1224706.5250 672168.950  45.1%     -    0s
H    0     0                    1132948.9375 672168.950  40.7%     -    0s
     0     0 787044.992    0   28 1132948.94 787044.992  30.5%     -    0s
H    0     0                    1118596.2003 787044.992  29.6%     -    0s
H    0     0                    957997.42500 787044.992  17.8%     -    0s
     0     0 816602.392    0   29 957997.425 816602.392  14.8%     -    0s
     0     0 833225.651    0   22 957997.425 833225.651  13.0%     -    0s
     0     0 841949.822    0   22 957997.425 841949.822  12.1%     -    0s
     0     0 847834.632    0   19 957997.425 847834.632  11.5%     -    0s
H    0     0                    890433.68750 847834.632  4.78%     -    0s
H    0     0                    869153.06250 847834.632  2.45%     -    0s
     0     2 848355.561    0   19 869153.062 848355.561  2.39%     -    0s
H   18    18                    864868.34140 851341.783  1.56%   3.3    0s
*   21     8              21    852524.62500 851341.783  0.14%   3.4    0s

Cutting planes:
  Implied bound: 161
  Flow cover: 3

Explored 27 nodes (346 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.525246250000e+05, best bound 8.524664037277e+05, gap 0.0068%