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Theorem size-del

r ∈ H, r ≠ null ⊦ #(H -- r) = # H - 1

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

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 3
Used lemmas:
Used spec theorems:
- heap/cell-heap/exin
Used simplifier rules:
- heap/cell-heap/nonnull
- heap/cell-heap/in-alloc
- heap/cell-heap/write-del
- heap/cell-heap/del-new
- heap/cell-heap/size-write
- heap/cell-heap/size-alloc
- nat/add-01
- nat-basic/add-base
- nat-basic/a
- nat-basic/c
- heap/cell-heap/sanity