Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:39:59 2013

Optimize a model with 39122 rows, 38502 columns and 153822 nonzeros
Presolve removed 2012 rows and 0 columns
Presolve time: 0.22s
Presolved: 37110 rows, 38502 columns, 149798 nonzeros
Variable types: 38440 continuous, 62 integer (62 binary)

Root relaxation: objective 7.232631e+04, 8587 iterations, 1.31 seconds

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

     0     0 72326.3128    0    5          - 72326.3128     -      -    1s
H    0     0                    74618.000000 72326.3128  3.07%     -    1s
     0     0 72326.6651    0    6 74618.0000 72326.6651  3.07%     -    2s
     0     0 72327.7977    0    5 74618.0000 72327.7977  3.07%     -    2s
     0     0 72327.8374    0    6 74618.0000 72327.8374  3.07%     -    2s
     0     2 72353.7000    0    6 74618.0000 72353.7000  3.03%     -    3s
H    1     1                    73472.652722 72353.7000  1.52%   0.0    3s
H   10    10                    72838.300000 72450.8758  0.53%   132    4s
H   11     7                    72715.495652 72450.8758  0.36%   121    4s
*   14     8              12    72703.000000 72450.8758  0.35%   109    4s
*   19     3               4    72615.000000 72500.5659  0.16%   117    4s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 23 nodes (10999 simplex iterations) in 4.79 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.261500000000e+04, best bound 7.261500000000e+04, gap 0.0%