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Proof step 17 from proof getintarray-subset (previous step)

¬ (st ⊆ st0 ∧ is_arrayref(r, st[r -- _length] .intval, st) ∧ r -- _length ∈ st), is_array(r, st), st ⊆ st0 ⊦ getintarray(r, st) = getintarray(r, st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ ¬ r -- _length ∈ st → ¬ is_array(r, st)
Proof step 16:
is_array(r, st), st ⊆ st0, r -- _length ∈ st, r ∈ st ⊦ getintarray(r, st) = getintarray(r, st0), is_arrayref(r, st[r -- _length] .intval, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])]]