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Proof step 27 from proof getbar-subset (previous step)

okbytearray(r, st), st ⊆ st0 ⊦ getbytearray(r, st) = getbytearray(r, st0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ getbytearray(r, st) = getbytearray(r0, st0) ↔ st[r -- _length] .intval ≤ 0 ∧ st0[r0 -- _length] .intval ≤ 0 ∨ 0 ≤ st[r -- _length] .intval ∧ st[r -- _length] .intval = st0[r0 -- _length] .intval ∧ (∀ j1. 0 ≤ j1 ∧ j1 < st[r -- _length] .intval → st[r -- j1 '] .byteval = st0[r0 -- j1 '] .byteval)
Proof step 26:
okbytearray(r, st), st ⊆ st0 ⊦ st[r -- _length] .intval ≤ 0 ∧ st0[r -- _length] .intval ≤ 0 ∨ 0 ≤ st[r -- _length] .intval ∧ st[r -- _length] .intval = st0[r -- _length] .intval ∧ (∀ j1. 0 ≤ j1 ∧ j1 < st[r -- _length] .intval → st[r -- j1 '] .byteval = st0[r -- j1 '] .byteval)

Rule argument

[speclemmaarg: , getbytearray(r, st) = getbytearray(r0, st0) ↔ st[r -- _length] .intval ≤ 0 ∧ st0[r0 -- _length] .intval ≤ 0 ∨ 0 ≤ st[r -- _length] .intval ∧ st[r -- _length] .intval = st0[r0 -- _length] .intval ∧ (∀ j1. 0 ≤ j1 ∧ j1 < st[r -- _length] .intval → st[r -- j1 '] .byteval = st0[r0 -- j1 '] .byteval) ,[st0, r0, st, r] → [st0, r, st, r] ,F ,storearrays , ,extension-01 ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st0, r, st, r)]]