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Proof step 9 from proof pathex-not-is-validref (previous step)

refs = r + refs0, validrefs(str, refs, st[r -- _type] .type, st) ⊦ refs .last = jvmref, refs = [], is_valid_ref(refs .last, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
validrefs(str, r ' + refs0, st[r -- _type] .type, st) ⊦ (r ' + refs0) .last = jvmref, is_valid_ref((r ' + refs0) .last, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ r ' + refs ≠ []], [CSIMPSEQ : ⊦ r + refs = r ' + refs])]]