Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:39:31 2013

Optimize a model with 39122 rows, 38502 columns and 153822 nonzeros
Presolve removed 2734 rows and 0 columns
Presolve time: 0.22s
Presolved: 36388 rows, 38502 columns, 148354 nonzeros
Variable types: 38440 continuous, 62 integer (62 binary)

Root relaxation: objective 6.710014e+04, 6999 iterations, 1.35 seconds

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

     0     0 67100.1380    0    7          - 67100.1380     -      -    1s
H    0     0                    69438.000000 67100.1380  3.37%     -    1s
H    0     0                    67456.000000 67100.1380  0.53%     -    2s
     0     0 67101.5765    0    8 67456.0000 67101.5765  0.53%     -    2s
     0     0 67102.0732    0    8 67456.0000 67102.0732  0.52%     -    2s
     0     0 67102.8292    0    8 67456.0000 67102.8292  0.52%     -    2s
     0     0 67102.8292    0    8 67456.0000 67102.8292  0.52%     -    2s
     0     0 67102.8292    0    8 67456.0000 67102.8292  0.52%     -    3s
     0     2 67103.9270    0    8 67456.0000 67103.9270  0.52%     -    4s
*    4     3               4    67290.000000 67261.6286  0.04%   157    4s

Cutting planes:
  Gomory: 1
  Flow cover: 9

Explored 9 nodes (7992 simplex iterations) in 4.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.729000000000e+04, best bound 6.729000000000e+04, gap 0.0%