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Proof step 22 from proof pathex-putstatfield (previous step)

refs0 = [], validrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st) ⊦ path∃(str, r, (r ' + refs0) .last, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
⊦ path∃(str, r, r, st) ↔ r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st)
Proof step 21:
validrefs(str, r ', mkclasstype(`java.lang.Object' .class), st) ⊦ r = jvmref, is_valid_ref(str, r, st)

Rule argument

[emptyarg]

Additional information

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