Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:00:53 2013

Optimize a model with 45627 rows, 44957 columns and 179627 nonzeros
Presolve removed 3567 rows and 0 columns
Presolve time: 0.27s
Presolved: 42060 rows, 44957 columns, 172493 nonzeros
Variable types: 44890 continuous, 67 integer (67 binary)

Root relaxation: objective 7.900956e+04, 8100 iterations, 1.11 seconds

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

     0     0 79009.5623    0    2          - 79009.5623     -      -    1s
H    0     0                    80016.000000 79009.5623  1.26%     -    1s
     0     0 79011.0658    0    2 80016.0000 79011.0658  1.26%     -    1s
H    0     0                    79585.000000 79011.0658  0.72%     -    2s
     0     0 79011.0658    0    2 79585.0000 79011.0658  0.72%     -    4s
     0     0 79011.0658    0    2 79585.0000 79011.0658  0.72%     -    5s
     0     2 79011.5254    0    2 79585.0000 79011.5254  0.72%     -    6s
H    8     6                    79314.000000 79087.2304  0.29%  95.5    6s
H   11     7                    79264.000000 79087.2304  0.22%  77.1    6s
*   16     8              15    79241.000000 79087.2304  0.19%  66.0    7s
*   22     4               6    79149.000000 79140.6071  0.01%  66.3    7s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 24 nodes (14579 simplex iterations) in 7.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.914900000000e+04, best bound 7.914213970588e+04, gap 0.0087%