nohup: ignoring input
  k=100 (2s)
  k=200 (10s)
  k=300 (30s)
  k=400 (70s)
  k=500 (136s)
  k=600 (244s)
  k=700 (400s)
sweep [79,734]: 0 non-positive
  k=79: crit_lower = 7.15
  k=734: crit_lower = 33751.39