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Theorem union-move-left

⊦ ¬ a ∈ st0 ∧ a ∈ st1 ∧ st1[a] = d → st0[a, d] ∪ (st1 -- a) = st0 ∪ st1

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 8
Used lemmas: union-in, union-at-left,
Used spec theorems:
- store/Extension
Used simplifier rules: