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Proof step 14 from proof validmode-superset (previous step)

_mode ∈ st ∧ validmode(str, st[_mode], st), st ⊆ st0 ⊦ _mode ∈ st0 ∧ validmode(str, st0[_mode], st0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ rk ∈ st ∧ ¬ rk ∈ st0 → ¬ st ⊆ st0])]]