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Proof step 8 from proof pathex-putbyte-field (previous step)

validrefs(str, r0 ' + refs0, mkclasstype(`java.lang.Object' .class), st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)]) ⊦ refs0 = [], junkref(str, r0, st), ∃ refs. refs ≠ [] ∧ refs .first = r0 ∧ refs .last = refs0 .last ∧ validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st)

User applied rule exists right

And obtained the following new goals

Proof step 7:
validrefs(str, r0 ' + refs0, mkclasstype(`java.lang.Object' .class), st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)]) ⊦ refs0 = [], junkref(str, r0, st), r0 + refs0 ≠ [] ∧ (r0 + refs0) .first = r0 ∧ (r0 + refs0) .last = refs0 .last ∧ validrefs(str, r0 + refs0, mkclasstype(`java.lang.Object' .class), st), ∃ refs. refs ≠ [] ∧ refs .first = r0 ∧ refs .last = refs0 .last ∧ validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st)

Rule argument

[EXRARG : pos: right 3, [extquanttermlist: (r0 + refs0) abort:F , discard:F , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r0 + refs0)]]