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Proof step 3 from proof is_array-okarray-01 (conclusion)

⊦ ¬ okarray(r, ty, st) ∧ st[r -- _type] .type = mkarraytype(ty0) ∧ ty0 ≤ ty → ¬ is_array(str, r, st)

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:
⊦ ¬ okarray(r, ty, st) ∧ st[r -- _type] .type = mkarraytype(ty0) ∧ ty0 ≤ ty → ¬ is_array(r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]