[Imprint][Data Privacy Statement][E-Mail]

View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 210 from proof pathex-put-nopathex (previous step)

validrefs(str, r ' + refs0, st[r -- _type] .type, st) ⊦ sk = _type, path∃(str, r, r0, st), junkref(str, r, st), path∃(str, r, (r ' + refs0) .last, st[r0 -- sk, val])

User applied rule induction

And obtained the following new goals

Proof step 209:
validrefs(str, r ' + refs0, st[r -- _type] .type, st), ∀ val, r0, sk, st, r, str, refs. # refs < # refs0 → ( validrefs(str, r ' + refs, st[r -- _type] .type, st) → sk = _type ∨ path∃(str, r, r0, st) ∨ junkref(str, r, st) ∨ path∃(str, r, (r ' + refs) .last, st[r0 -- sk, val])) ⊦ sk = _type ∨ path∃(str, r, r0, st) ∨ junkref(str, r, st) ∨ path∃(str, r, (r ' + refs0) .last, st[r0 -- sk, val])

Rule argument

[INDHYPARG : [STANDARDINDUCTIONTYPE : ], true, false, # refs0, [] → [], <]

Additional information

[[CONCRETESIMPRULES : ([CSIMPLESSPRED : <])], [EXTRATERMS : (# refs0)]]