Goal:
  
  G : t
  invG : invariants G
  acG : acyclic_no_loop' G
  x : V.t
  s : VSet.t
  p : SPath G s x x
  wp : sweight p > 0
  ============================
   (sweight p > 0)


DEBUG:Going to execute:
done
DEBUG LTAC Evaluated term: sweight_weight
DEBUG LTAC Evaluated term: sweight_weight