Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:19 2013

Optimize a model with 25550 rows, 25050 columns and 100050 nonzeros
Presolve removed 1989 rows and 0 columns
Presolve time: 0.14s
Presolved: 23561 rows, 25050 columns, 96072 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 4.707607e+04, 3216 iterations, 0.26 seconds

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

     0     0 47076.0712    0    2          - 47076.0712     -      -    0s
H    0     0                    47264.000000 47076.0712  0.40%     -    0s
H    0     0                    47241.000000 47076.0712  0.35%     -    0s
     0     0 47076.6738    0    4 47241.0000 47076.6738  0.35%     -    0s
     0     0 47076.6738    0    2 47241.0000 47076.6738  0.35%     -    1s
     0     0 47076.8872    0    4 47241.0000 47076.8872  0.35%     -    1s
     0     0 47077.3277    0    4 47241.0000 47077.3277  0.35%     -    1s
     0     2 47078.4360    0    4 47241.0000 47078.4360  0.34%     -    1s
*    7     4               5    47234.000000 47103.4182  0.28%  41.4    1s
H   11     1                    47184.111111 47106.4444  0.16%  34.1    2s
*   12     1               3    47107.000000 47107.0000   0.0%  32.2    2s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 13 nodes (4779 simplex iterations) in 2.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.710700000000e+04, best bound 4.710700000000e+04, gap 0.0%