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Proof step 21 from proof pathex-array (previous step)

∃ refs. refs ≠ [] ∧ refs .first = r ∧ refs .last = r0 ∧ validrefs(str, refs, st[r -- _type] .type, st), is_array(str, r, st) ⊦ ∃ i. ¬ 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 ∧ path∃(str, st[r -- i '] .refval, r0, st) ∨ st[r -- i '] .refval = jvmref ∧ r0 = jvmref), r = r0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
validrefs(str, refs, st[refs .first -- _type] .type, st), is_array(str, refs .first, st) ⊦ refs .first = refs .last, refs = [], ∃ i. ¬ i < 0 ∧ ¬ st[refs .first -- _length] .intval ≤ i ∧ is_referencevalue(st[refs .first -- i ']) ∧ ( st[refs .first -- i '] .refval ≠ jvmref ∧ st[st[refs .first -- i '] .refval -- _type] .type ≤ st[refs .first -- _type] .type .type ∧ path∃(str, st[refs .first -- i '] .refval, refs .last, st) ∨ st[refs .first -- i '] .refval = jvmref ∧ refs .last = jvmref)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]