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Proof step 20 from proof validrefkeynotnull-put-byteval (previous step)

is_bytevalue(st[r -- mkfs(class, byte_type, fieldvar) ']), validrefkeynotnull(str, rk, ty, st) ⊦ mkfs(class, byte_type, fieldvar) ' = _length, r = jvmref, rk ∈ st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)] ∧ validrefvalnotnull(str, st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)][rk], ty, st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ validrefkeynotnull(str, rk, ty, st) → rk ∈ st
Proof step 19:
is_bytevalue(st[r -- mkfs(class, byte_type, fieldvar) ']), validrefkeynotnull(str, rk, ty, st) ⊦ mkfs(class, byte_type, fieldvar) ' = _length, r = jvmref, validrefvalnotnull(str, st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)][rk], ty, st[r -- mkfs(class, byte_type, fieldvar) ', byteval(by)])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ rk ∈ st[rk0, val] ↔ rk = rk0 ∨ rk ∈ st])]]