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Theorem free-unknown

⊦ h1 ≡ h0 -- r → ((r.=>_ * hP)(h0) ↔ hP(h1) ∧ r ∈ h0 ∧ ¬ r ∈ h1)

Type: A user defined theorem
Validity: The proof is valid.
Features: s,
Comment:
Used by: exec-assign-wp,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 2
Used lemmas: free-notin, free-unknown-weak,
Used spec theorems:
- Used simplifier rules: