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Proof step 20 from proof getbytearray-addarray-this (previous step)

n < i→n(i), 0 < i ⊦ (getbytearray(r, addarray(r, byte_type, i, st))[n]) = i2b(0), i = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ n→i(n) < st[r -- _length] .intval → (getbytearray(r, st)[n]) = st[r -- n→i(n) '] .byteval
Proof step 9:
¬ n→i(n) < (addarray(r, byte_type, i, st)[r -- _length]) .intval, n < i→n(i), 0 < i ⊦ (getbytearray(r, addarray(r, byte_type, i, st))[n]) = i2b(0), i = 0
Proof step 19:
n→i(n) < (addarray(r, byte_type, i, st)[r -- _length]) .intval, n < i→n(i), 0 < i ⊦ (addarray(r, byte_type, i, st)[r -- n→i(n) ']) .byteval = i2b(0), i = 0

Rule argument

[speclemmaarg: , n→i(n) < st[r -- _length] .intval → (getbytearray(r, st)[n]) = st[r -- n→i(n) '] .byteval ,[n, st, r] → [n, addarray(r, byte_type, i, st), r] ,F ,storearrays , ,bar-at-01 ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (n, addarray(r, byte_type, i, st), r)]]