leads_to_trans

vstd_extra::temporal_logic::rules

Function leads_to_trans 

Source 
pub proof fn leads_to_trans<T>(
    spec: TempPred<T>,
    p: TempPred<T>,
    q: TempPred<T>,
    r: TempPred<T>,
)
Expand description
requires
spec.entails(p.leads_to(q)),
spec.entails(q.leads_to(r)),
ensures
spec.entails(p.leads_to(r)),

Leads to is transitive.

§Preconditions

  • spec ⊧ p ⇝ q
  • spec ⊧ q ⇝ r

§Postconditions

  • spec ⊧ p ⇝ r