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Proof step 68 from proof validval-put-any (previous step)

validval(str, rk, val, st), ( is_fskey(mkfs(class, ty, fieldvar) ') → validval(str, val0, mkfs(class, ty, fieldvar) ' .fs .type, st) ∧ mkfs(class, ty, fieldvar) ' .fs .type ≠ void_type ∧ mkfs(class, ty, fieldvar) ' ≠ _length) ∧ (is_indexkey(mkfs(class, ty, fieldvar) ') → validval(str, val0, st[r -- _type] .type .type, st)) ⊦ r -- _type = rk, validval(str, val0, ty, st[rk, val]) ∧ ty ≠ void_type ∧ mkfs(class, ty, fieldvar) ' ≠ _length

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 67:
validval(str, rk, val, st), validval(str, val0, ty, st) ⊦ r -- _type = rk, mkfs(class, ty, fieldvar) ' = _length, ty = void_type, validval(str, val0, ty, st[rk, val])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(fs ')], [CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty], [CSIMPSEQ : ⊦ fs ' .fs = fs], [CSIMPSEQ : ⊦ is_fskey(fs ')])]]