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Proof step 54 from proof validrefs-put-last (previous step)

st[r -- i '] = refval(r1), acc + r0 ' = r1 ' + refs, 0 < st[r -- _length] .intval, 0 ≤ i, validrefs(str, r1 ' + refs, st[r -- _type] .type .type, st[r0 -- sk, val]), i < st[r -- _length] .intval, st[r -- _type] .type ≤ ty, is_array(str, r, st) ⊦ r = jvmref, r0 = r, sk = _type, validrefs(str, r1 ' + refs, st[r -- _type] .type .type, st), r0 ∈ acc, ¬ r1 ∈ acc ∧ r1 ≠ r0, r0 ≠ r1 ∧ ¬ r0 ∈ refs, ¬ junkref(str, acc .first, st) ∧ acc ≠ [], ∃ i0. ¬ i0 < 0 ∧ ¬ st[r -- _length] .intval ≤ i0 ∧ is_referencevalue(st[r -- i0 ']) ∧ st[r -- i0 '] .refval ≠ jvmref ∧ (¬ st[st[r -- i0 '] .refval -- _type] .type ≤ st[r -- _type] .type .type ∨ junkref(str, st[r -- i0 '] .refval, st))

User applied rule exists right

And obtained the following new goals

Proof step 53:
st[r -- i '] = refval(r1), acc + r0 ' = r1 ' + refs, 0 < st[r -- _length] .intval, 0 ≤ i, validrefs(str, r1 ' + refs, st[r -- _type] .type .type, st[r0 -- sk, val]), i < st[r -- _length] .intval, st[r -- _type] .type ≤ ty, is_array(str, r, st) ⊦ r = jvmref, r0 = r, sk = _type, validrefs(str, r1 ' + refs, st[r -- _type] .type .type, st), r0 ∈ acc, ¬ r1 ∈ acc ∧ r1 ≠ r0, r0 ≠ r1 ∧ ¬ r0 ∈ refs, ¬ junkref(str, acc .first, st) ∧ acc ≠ [], ¬ i < 0 ∧ ¬ st[r -- _length] .intval ≤ i ∧ is_referencevalue(st[r -- i ']) ∧ st[r -- i '] .refval ≠ jvmref ∧ (¬ st[st[r -- i '] .refval -- _type] .type ≤ st[r -- _type] .type .type ∨ junkref(str, st[r -- i '] .refval, st))

Rule argument

[EXRARG : pos: right 9, [extquanttermlist: (i)abort:F, discard:T, computed:T]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (i)]]