Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:44:10 2013

Optimize a model with 40383 rows, 39753 columns and 158823 nonzeros
Presolve removed 1458 rows and 0 columns
Presolve time: 0.24s
Presolved: 38925 rows, 39753 columns, 155907 nonzeros
Variable types: 39690 continuous, 63 integer (63 binary)

Root relaxation: objective 7.701060e+04, 8382 iterations, 1.35 seconds

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

     0     0 77010.6000    0    1          - 77010.6000     -      -    1s
H    0     0                    77221.000000 77010.6000  0.27%     -    1s
     0     0 77010.6729    0    2 77221.0000 77010.6729  0.27%     -    1s
H    0     0                    77155.789474 77010.6729  0.19%     -    2s
     0     0 77010.6729    0    1 77155.7895 77010.6729  0.19%     -    3s
     0     0 77018.6383    0    3 77155.7895 77018.6383  0.18%     -    3s
H    0     0                    77117.000000 77018.6383  0.13%     -    3s
     0     0 77019.5088    0    3 77117.0000 77019.5088  0.13%     -    3s
     0     0 77020.5974    0    4 77117.0000 77020.5974  0.13%     -    4s
     0     0 77021.7500    0    2 77117.0000 77021.7500  0.12%     -    4s
     0     2 77021.8602    0    2 77117.0000 77021.8602  0.12%     -    4s
*    6     2               5    77091.000000 77030.6496  0.08%  46.8    4s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 11 nodes (12387 simplex iterations) in 4.84 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.709100000000e+04, best bound 7.709100000000e+04, gap 0.0%