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Proof step 47 from proof junkrefs-null-01 (previous step)

is_array(str, r, st), st[r -- _type] .type ≤ ty, ∀ str0, refs1, ty0, st0. junkrefs(str0, (r0 ' + refs) + jvmref ' + refs1, ty0, st0) ↔ junkrefs(str0, r0 ' + refs, ty0, st0) ⊦ r = jvmref, (∃ i. 0 ≤ i ∧ i < st[r -- _length] .intval ∧ is_referencevalue(st[r -- i ']) ∧ r0 = st[r -- i '] .refval ∧ junkrefs(str, (st[r -- i '] .refval ' + refs) + jvmref ' + refs0, st[r -- _type] .type .type, st)) ↔ (∃ i. ¬ i < 0 ∧ ¬ st[r -- _length] .intval ≤ i ∧ is_referencevalue(st[r -- i ']) ∧ r0 = st[r -- i '] .refval ∧ junkrefs(str, st[r -- i '] .refval ' + refs, st[r -- _type] .type .type, st))

User applied rule case distinction

And obtained the following new goals

Rule argument

[CASEDARG : pos: right 2, ()]

Additional information

[[CONCRETESIMPRULES : ()]]