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Proof step 9 from proof gft-out (previous step)

⊦ r = jvmref, is_fskey(fs ') ∧ r -- fs ' ∈ st[_out, val] ∧ okval(st[_out, val][r -- fs '], fs ' .fs .type) ↔ ¬ is_indexkey(fs ') ∧ r -- fs ' ∈ st ∧ okval(st[r -- fs '], fs ' .fs .type)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
⊦ r = jvmref, r -- fs ' ∈ st[_out, val] ∧ okval(st[_out, val][r -- fs '], fs .type) ↔ r -- fs ' ∈ st ∧ okval(st[r -- fs '], fs .type)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ is_indexkey(fs ')], [CSIMPSEQ : ⊦ fs ' .fs = fs], [CSIMPSEQ : ⊦ is_fskey(fs ')])]]