Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:18:34 2013

Optimize a model with 49770 rows, 49070 columns and 196070 nonzeros
Presolve removed 2439 rows and 0 columns
Presolve time: 0.30s
Presolved: 47331 rows, 49070 columns, 191192 nonzeros
Variable types: 49000 continuous, 70 integer (70 binary)

Root relaxation: objective 7.984976e+04, 10183 iterations, 1.98 seconds

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

     0     0 79849.7582    0    3          - 79849.7582     -      -    2s
H    0     0                    82214.000000 79849.7582  2.88%     -    2s
H    0     0                    81506.000000 79849.7582  2.03%     -    2s
     0     0 79849.9262    0    3 81506.0000 79849.9262  2.03%     -    2s
H    0     0                    81076.000000 79849.9262  1.51%     -    3s
     0     0 79850.0514    0    3 81076.0000 79850.0514  1.51%     -    3s
H    0     0                    80453.938776 79850.0514  0.75%     -    4s
H    0     0                    80136.000000 79850.0514  0.36%     -    4s
     0     0 79960.6863    0    3 80136.0000 79960.6863  0.22%     -    6s
     0     0 79962.3196    0    5 80136.0000 79962.3196  0.22%     -    6s
     0     0 79962.3667    0    4 80136.0000 79962.3667  0.22%     -    7s
     0     0 79962.3719    0    4 80136.0000 79962.3719  0.22%     -    7s
     0     0 79964.0638    0    2 80136.0000 79964.0638  0.21%     -    7s
     0     2 79972.3000    0    2 80136.0000 79972.3000  0.20%     -    8s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 7 nodes (14222 simplex iterations) in 8.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.013600000000e+04, best bound 8.013600000000e+04, gap 0.0%