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Proof step 13 from proof validref-nopath-superset (previous step)

validrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st0), validrefnotnull(str, r, st[r -- _type] .type, st), st ⊆ st0, newref((r ' + refs0) .last, st) ⊦ refs0 = [], r = jvmref, (r ' + refs0) .last = jvmref

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 12:
validrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st0), validrefnotnull(str, r, st[r -- _type] .type, st), st ⊆ st0, newref(refs0 .last, st) ⊦ refs0 = [], r = jvmref, refs0 .last = jvmref

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ newref(r, st) → r ≠ jvmref], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ refs ≠ [] → (r ' + refs) .last = refs .last])]]