Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:43:27 2013

Optimize a model with 40383 rows, 39753 columns and 158823 nonzeros
Presolve removed 1128 rows and 0 columns
Presolve time: 0.23s
Presolved: 39255 rows, 39753 columns, 156567 nonzeros
Variable types: 39690 continuous, 63 integer (63 binary)

Root relaxation: objective 6.956397e+04, 8965 iterations, 1.56 seconds

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

     0     0 69563.9705    0    3          - 69563.9705     -      -    1s
H    0     0                    70401.000000 69563.9705  1.19%     -    2s
H    0     0                    69902.000000 69563.9705  0.48%     -    2s
     0     0 69564.4356    0    4 69902.0000 69564.4356  0.48%     -    2s
     0     0 69564.6245    0    4 69902.0000 69564.6245  0.48%     -    2s
     0     2 69564.9634    0    4 69902.0000 69564.9634  0.48%     -    4s
     4     4 69745.7081    3    2 69902.0000 69716.1773  0.27%   148    5s
*   22     3               7    69874.000000 69843.6849  0.04%  99.5    5s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 26 nodes (11251 simplex iterations) in 5.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.987400000000e+04, best bound 6.987400000000e+04, gap 0.0%