Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:12:33 2013

Optimize a model with 48369 rows, 47679 columns and 190509 nonzeros
Presolve removed 1996 rows and 0 columns
Presolve time: 0.29s
Presolved: 46373 rows, 47679 columns, 186517 nonzeros
Variable types: 47610 continuous, 69 integer (69 binary)

Root relaxation: objective 7.020515e+04, 8263 iterations, 1.34 seconds

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

     0     0 70205.1534    0    4          - 70205.1534     -      -    1s
H    0     0                    73107.000000 70205.1534  3.97%     -    1s
     0     0 70210.2987    0    5 73107.0000 70210.2987  3.96%     -    2s
     0     0 70210.9997    0    5 73107.0000 70210.9997  3.96%     -    2s
     0     0 70211.1904    0    5 73107.0000 70211.1904  3.96%     -    2s
     0     2 70218.7925    0    5 73107.0000 70218.7925  3.95%     -    4s
H    2     2                    71476.634615 70406.8133  1.50%   144    4s
H    4     4                    70965.000000 70406.8133  0.79%   108    5s
*   10     6               7    70736.000000 70406.8133  0.47%   189    5s
H   15     2                    70714.645161 70449.4312  0.38%   156    5s
H   16     3                    70709.789474 70449.4312  0.37%   150    5s
*   18     3               5    70644.000000 70449.4312  0.28%   146    6s

Cutting planes:
  Gomory: 3
  Flow cover: 10

Explored 34 nodes (11990 simplex iterations) in 6.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.064400000000e+04, best bound 7.064400000000e+04, gap 0.0%