Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:29 2013

Optimize a model with 25550 rows, 25050 columns and 100050 nonzeros
Presolve removed 2598 rows and 0 columns
Presolve time: 0.14s
Presolved: 22952 rows, 25050 columns, 94854 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 5.445425e+04, 4953 iterations, 0.47 seconds

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

     0     0 54454.2531    0    5          - 54454.2531     -      -    0s
H    0     0                    57541.000000 54454.2531  5.36%     -    0s
H    0     0                    57439.000000 54454.2531  5.20%     -    0s
H    0     0                    54953.000000 54454.2531  0.91%     -    0s
     0     0 54455.9827    0    7 54953.0000 54455.9827  0.90%     -    0s
     0     0 54456.3666    0    7 54953.0000 54456.3666  0.90%     -    1s
     0     0 54460.0179    0    4 54953.0000 54460.0179  0.90%     -    1s
     0     2 54472.8598    0    4 54953.0000 54472.8598  0.87%     -    2s
H    5     4                    54816.571429 54505.6432  0.57%   148    2s
H    6     4                    54742.000000 54505.6432  0.43%   140    2s
H    8     3                    54733.964286 54505.6432  0.42%   129    2s
H    9     3                    54712.333333 54505.6432  0.38%   117    2s
*   12     3              10    54694.000000 54505.6432  0.34%  89.7    2s
H   14     2                    54668.444444 54653.3462  0.03%  91.1    2s
*   16     1               5    54659.000000 54653.3462  0.01%  83.6    2s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 18 nodes (6490 simplex iterations) in 2.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.465900000000e+04, best bound 5.465900000000e+04, gap 0.0%