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Proof step 4 from proof is_array-put-samefield (conclusion)

⊦ is_array(str, r, st) ∧ oktype(val, fs .type, st) ∧ fs ' ≠ _type ∧ fs ' ≠ _length → is_array(str, r, st[r -- fs ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ is_array(str, r, st) ↔ ¬ ¬ ( type∃(str, st[r -- _type] .type) ∧ st[r -- _type] .type .jtelemtype ≠ void_type ∧ st[r -- _type] .type .jtelemtype ≠ abstract_type ∧ is_array(r, st))
Proof step 2:
⊦ oktype(val, ty, st) ↔ okval(val, ty)
Proof step 3:
⊦ fs ' ≠ _length ∧ fs ' ≠ _type → (is_array(str, r, st[r0 -- fs ', val]) ↔ is_array(str, r, st))

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]