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Theorem root-nonnull
⊦ r ≠ null ∧ ((tr(r, t) * P))(H) → (∃ t0, a, t1. t = branch(t0, a, t1))
Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by:
delete-prepost
,
delete-prepost-min
,
insert-prepost
,
Used by units in proved state:
Proof exists?: