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Theorem disjoint-subset

⊦ (∀ r. r ∈ refs → ¬ junkref(str, r, st)) ∧ disjoint(str, refs, st) ∧ st ⊆ st1 → disjoint(str, refs, st1)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: disjoint-subset-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 6
Proof steps: 16
Used lemmas: disjoint-def-pathex,
Used spec theorems:
- cyclic/pathex-subset-equiv
Used simplifier rules: