Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:30:21 2013

Optimize a model with 35459 rows, 34869 columns and 139299 nonzeros
Presolve removed 1812 rows and 0 columns
Presolve time: 0.20s
Presolved: 33647 rows, 34869 columns, 135675 nonzeros
Variable types: 34810 continuous, 59 integer (59 binary)

Root relaxation: objective 6.907250e+04, 6746 iterations, 0.81 seconds

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

     0     0 69072.5005    0    3          - 69072.5005     -      -    1s
H    0     0                    69121.000000 69072.5005  0.07%     -    1s
H    0     0                    69106.000000 69072.5005  0.05%     -    1s
     0     0 69072.5224    0    4 69106.0000 69072.5224  0.05%     -    1s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    1s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    2s
     0     0 69090.8017    0    2 69106.0000 69090.8017  0.02%     -    2s
     0     0 69103.4615    0    1 69106.0000 69103.4615  0.00%     -    2s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (8746 simplex iterations) in 2.67 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.910600000000e+04, best bound 6.910346153846e+04, gap 0.0037%