Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:30:53 2013

Optimize a model with 649 rows, 34869 columns and 69679 nonzeros
Presolve time: 0.05s
Presolved: 649 rows, 34869 columns, 69679 nonzeros
Variable types: 34810 continuous, 59 integer (59 binary)

Root relaxation: objective 6.853734e+04, 1370 iterations, 0.04 seconds

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

     0     0 68537.3412    0    8          - 68537.3412     -      -    0s
H    0     0                    70870.000000 68537.3412  3.29%     -    0s
     0     0 69068.7970    0    3 70870.0000 69068.7970  2.54%     -    0s
H    0     0                    70396.226606 69068.7970  1.89%     -    0s
H    0     0                    69856.000000 69068.7970  1.13%     -    0s
     0     0 69072.5005    0    3 69856.0000 69072.5005  1.12%     -    0s
H    0     0                    69680.000000 69072.5005  0.87%     -    0s
     0     0 69072.5005    0    3 69680.0000 69072.5005  0.87%     -    0s
     0     0 69072.5005    0    3 69680.0000 69072.5005  0.87%     -    0s
H    0     0                    69106.000000 69072.5005  0.05%     -    0s
     0     0 69072.5005    0    6 69106.0000 69072.5005  0.05%     -    0s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    0s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    0s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    0s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    0s
     0     0 69103.4615    0    1 69106.0000 69103.4615  0.00%     -    0s

Cutting planes:
  Implied bound: 24
  Flow cover: 2

Explored 0 nodes (2677 simplex iterations) in 0.86 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%