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Proof step 12 from proof pathex-validrefs-in (previous step)

validrefs(str, r ' + refs1 + r0 ' + refs0, ty, st) ⊦ r ' + refs1 + r0 ' ≠ [] ∧ (r ' + refs1 + r0 ') .first = r ∧ (r ' + refs1 + r0 ') .last = r0 ∧ validrefs(str, r ' + refs1 + r0 ', mkclasstype(`java.lang.Object' .class), st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
validrefs(str, r ' + refs1 + r0 ' + refs0, ty, st) ⊦ validrefs(str, r ' + refs1 + r0 ', mkclasstype(`java.lang.Object' .class), st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (r ' + refs + r0 ') .last = r0], [CSIMPSEQ : ⊦ (r ' + refs) .first = r], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ r ' ≠ []], [CSIMPSEQ : ⊦ ¬ refs + refs0 ≠ [] ↔ refs = [] ∧ refs0 = []])]]