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Proof step 7 from proof okbytearray-is-byte (previous step)

sks ≠ [], okbytearray(st[r -- sks] .refval, st), i < st[r -- (sks + _length ')] .intval, 0 ≤ i, 0 < st[r -- (sks + _length ')] .intval ⊦ sks = [], is_bytevalue(st[st[r -- sks] .refval -- i '])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
0 < st[r -- (sks + _length ')] .intval, 0 ≤ i, i < st[r -- (sks + _length ')] .intval, okbytearray(st[r -- sks] .refval, st) ⊦ sks = [], is_bytevalue(st[st[r -- sks] .refval -- i '])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]