Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:50 2013

Optimize a model with 550 rows, 25050 columns and 50050 nonzeros
Presolve time: 0.03s
Presolved: 550 rows, 25050 columns, 50050 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 5.192994e+04, 806 iterations, 0.02 seconds

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

     0     0 51929.9383    0    7          - 51929.9383     -      -    0s
H    0     0                    55589.000000 51929.9383  6.58%     -    0s
     0     0 52252.6942    0    5 55589.0000 52252.6942  6.00%     -    0s
H    0     0                    55480.000000 52252.6942  5.82%     -    0s
     0     0 52305.0937    0    6 55480.0000 52305.0937  5.72%     -    0s
H    0     0                    54591.000000 52305.0937  4.19%     -    0s
     0     0 52309.8651    0    6 54591.0000 52309.8651  4.18%     -    0s
     0     0 52314.9542    0    5 54591.0000 52314.9542  4.17%     -    0s
H    0     0                    54347.042822 52314.9542  3.74%     -    0s
H    0     0                    53663.000000 52314.9542  2.51%     -    0s
     0     0 52314.9542    0    5 53663.0000 52314.9542  2.51%     -    0s
     0     0 52314.9542    0    5 53663.0000 52314.9542  2.51%     -    0s
H    0     0                    52977.000000 52314.9542  1.25%     -    0s
H    0     0                    52839.000000 52314.9542  0.99%     -    0s
     0     2 52316.5195    0    5 52839.0000 52316.5195  0.99%     -    0s
H   13     9                    52619.000000 52416.1349  0.39%  14.7    0s
*   16     6              14    52530.000000 52416.1349  0.22%  16.7    0s

Cutting planes:
  Implied bound: 89
  Flow cover: 11

Explored 26 nodes (1673 simplex iterations) in 0.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.253000000000e+04, best bound 5.253000000000e+04, gap 0.0%