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Theorem emptymove-splitfirst

move(IOAut(start, step, ext))(s, [], s2), s ≠ s2 ⊦ ∃ s1, a. ext(a) = None ∧ step(s, a, s1) ∧ move(IOAut(start, step, ext))(s1, [], s2)

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: 6
Proof steps: 15
Used lemmas: finfrag-rec, finfrag-onlyone, not-finfrag-empty, move,
Used spec theorems:
- Used simplifier rules: