Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:27:14 2013

Optimize a model with 34278 rows, 33698 columns and 134618 nonzeros
Presolve removed 1511 rows and 0 columns
Presolve time: 0.20s
Presolved: 32767 rows, 33698 columns, 131596 nonzeros
Variable types: 33640 continuous, 58 integer (58 binary)

Root relaxation: objective 6.722691e+04, 7540 iterations, 1.03 seconds

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

     0     0 67226.9052    0    4          - 67226.9052     -      -    1s
H    0     0                    69575.000000 67226.9052  3.37%     -    1s
H    0     0                    67548.000000 67226.9052  0.48%     -    1s
     0     0 67245.1336    0    6 67548.0000 67245.1336  0.45%     -    1s
     0     0 67245.4347    0    6 67548.0000 67245.4347  0.45%     -    1s
     0     0 67245.4347    0    6 67548.0000 67245.4347  0.45%     -    2s
     0     0 67245.8499    0    5 67548.0000 67245.8499  0.45%     -    2s
     0     0 67245.8499    0    4 67548.0000 67245.8499  0.45%     -    3s
     0     0 67245.8499    0    6 67548.0000 67245.8499  0.45%     -    3s
     0     0 67245.8499    0    5 67548.0000 67245.8499  0.45%     -    4s
     0     0 67245.8499    0    5 67548.0000 67245.8499  0.45%     -    4s
     0     0 67251.3022    0    4 67548.0000 67251.3022  0.44%     -    4s
     0     2 67263.2181    0    4 67548.0000 67263.2181  0.42%     -    4s
*    7     4               5    67527.000000 67417.1195  0.16%   117    4s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 17 nodes (12169 simplex iterations) in 4.93 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.752700000000e+04, best bound 6.752545454545e+04, gap 0.0023%