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Proof step 18 from proof getarray-in (previous step)

i < st[r -- _length] .intval, 0 ≤ i, 0 < st[r -- _length] .intval, # getarray(r, st) ≤ i→n(i) ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 15:
0 ≤ i ⊦ m ≤ i→n(i) ↔ n→i(m) ≤ i
Proof step 17:
0 ≤ i, i < st[r -- _length] .intval, 0 ≤ i, 0 < st[r -- _length] .intval, n→i(# getarray(r, st)) ≤ i ⊦

Rule argument

[speclemmaarg: 0 ≤ i ,((* m)) ≤ i→n(i) ↔ n→i(m) ≤ i ,[i, m] → [i, # getarray(r, st)] ,F ,intnat , ,num-i2n-le-02 ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (i, # getarray(r, st))]]