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Proof step 46 from proof pathexplus-pathex (previous step)

refs1 = refs + r0 ', validrefs(str, r ' + refs1, mkclasstype(`java.lang.Object' .class), st), is_valid_ref(str, r, st) ⊦ refs1 = [], r = r0, r = jvmref, validrefs(str, r ' + refs, mkclasstype(`java.lang.Object' .class), st) ∧ step∃(str, (r ' + refs) .last, r0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 45:
validrefs(str, r ' + refs + r0 ', mkclasstype(`java.lang.Object' .class), st), is_valid_ref(str, r, st) ⊦ r = r0, r = jvmref, validrefs(str, r ' + refs, mkclasstype(`java.lang.Object' .class), st) ∧ step∃(str, (r ' + refs) .last, r0, st)

Rule argument

[emptyarg]

Additional information

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