Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:12:07 2013

Optimize a model with 26571 rows, 26061 columns and 104091 nonzeros
Presolve removed 769 rows and 0 columns
Presolve time: 0.15s
Presolved: 25802 rows, 26061 columns, 102553 nonzeros
Variable types: 26010 continuous, 51 integer (51 binary)

Root relaxation: objective 5.329088e+04, 4709 iterations, 0.51 seconds

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

     0     0 53290.8784    0    6          - 53290.8784     -      -    0s
H    0     0                    54984.000000 53290.8784  3.08%     -    0s
     0     0 53291.2650    0    7 54984.0000 53291.2650  3.08%     -    1s
     0     0 53291.2772    0    4 54984.0000 53291.2772  3.08%     -    1s
H    0     0                    54899.149655 53291.2772  2.93%     -    1s
H    0     0                    53779.000000 53291.2772  0.91%     -    1s
     0     0 53291.2829    0    7 53779.0000 53291.2829  0.91%     -    1s
     0     2 53292.4562    0    7 53779.0000 53292.4562  0.90%     -    1s
H    4     4                    53771.413793 53365.4953  0.75%  48.0    2s
*   18    10              14    53717.000000 53365.4953  0.65%  44.8    2s
H   36    14                    53619.000000 53392.3850  0.42%  42.9    2s
*   37     9               8    53452.000000 53392.3850  0.11%  43.9    2s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 53 nodes (6772 simplex iterations) in 2.92 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.345200000000e+04, best bound 5.345060028246e+04, gap 0.0026%