[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 12 from proof inv-write-echdr (previous step)

apebs[n] = mkpeb(empty, avhdr, buf, m, false), aehdr.valid?, n < # apebs, ubi-io-inv(apebs), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪choose aehdr with ¬ aehdr.valid? in apebs[n].echdr := aehdr⟫ ubi-io-inv(apebs), err0 = ESUCCESS

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 13:
apebs[n] = mkpeb(empty, avhdr, buf, m, false), aehdr0.valid?, n < # apebs, ubi-io-inv(apebs), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪apebs[n].echdr := aehdr⟫ ubi-io-inv(apebs), err0 = ESUCCESS, aehdr.valid?
Proof step 14:
apebs[n] = mkpeb(empty, avhdr, buf, m, false), aehdr.valid?, n < # apebs, ubi-io-inv(apebs), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ err0 = ESUCCESS, ∃ aehdr. ¬ aehdr.valid?

Proof step 12 from proof inv-write-echdr (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

Additional information