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Theorem gfts-not

sk ≠ _type ∧ is_fskey(sk) ∧ oktype(val, sk .fs .type, st) ⊦ ¬ goodfieldsandtypes(r, sks, st[r0 -- sk, val]) → ¬ goodfieldsandtypes(r, sks, st)

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 4
Used lemmas: gfts-not-01,
Used spec theorems:
- Used simplifier rules: