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Proof step 28 from proof nopathex-badarrayfield (previous step)

¬ (r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ st[r -- _type] .type)), fs ' = _length, validrefs(str, r ' + refs0, st[r -- _type] .type, st), is_arraytype(st[refs0 .last -- _type] .type), contains(str, st[r -- _type] .type, st[refs0 .last -- _type] .type) ⊦ r = refs0 .last, refs0 = [], refs0 .last = jvmref, contains(str, st[r -- _type] .type, fs)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
fs ' = _length, validrefs(str, r ' + refs0, st[r -- _type] .type, st), is_arraytype(st[refs0 .last -- _type] .type), contains(str, st[r -- _type] .type, st[refs0 .last -- _type] .type), is_valid_ref(str, r, st) ⊦ r = refs0 .last, refs0 = [], refs0 .last = jvmref, r = jvmref, contains(str, st[r -- _type] .type, fs)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_valid_ref(str, r, st) → ( validrefs (str, r ' + refs, ty, st) ↔ r = jvmref ∧ refs = [])], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ validrefs (str, jvmref ' + refs, ty, st) ↔ refs = []], [CSIMPSEQ : ⊦ ty ≤ ty])]]