Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:52:11 2013

Optimize a model with 42965 rows, 42315 columns and 169065 nonzeros
Presolve removed 2651 rows and 0 columns
Presolve time: 0.25s
Presolved: 40314 rows, 42315 columns, 163763 nonzeros
Variable types: 42250 continuous, 65 integer (65 binary)

Root relaxation: objective 6.615131e+04, 8202 iterations, 1.28 seconds

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

     0     0 66151.3087    0    3          - 66151.3087     -      -    1s
H    0     0                    67034.000000 66151.3087  1.32%     -    1s
     0     0 66151.5407    0    4 67034.0000 66151.5407  1.32%     -    2s
     0     0 66151.5407    0    4 67034.0000 66151.5407  1.32%     -    2s
H    0     0                    66888.485166 66151.5407  1.10%     -    3s
     0     2 66151.7579    0    3 66888.4852 66151.7579  1.10%     -    3s
H    8     7                    66794.000000 66223.0000  0.85%  96.6    4s
H   12     5                    66503.400000 66223.0000  0.42%  75.7    4s
H   13     4                    66410.000000 66223.0000  0.28%  70.7    4s
*   14     3              14    66405.000000 66223.0000  0.27%  67.5    4s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 20 nodes (9711 simplex iterations) in 4.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.640500000000e+04, best bound 6.640500000000e+04, gap 0.0%