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Proof step 72 from proof reduction-is-topred-in-ctxt (previous step)

∃ C, t2, t3. context(C) ∧ t0 _ t1 = C[t2] ∧ t2 =>top t3 ∧ t' = C[t3], ∀ t'. t0 => t' ↔ (∃ C, t2, t1. context(C) ∧ t0 = C[t2] ∧ t2 =>top t1 ∧ t' = C[t1]), ∀ t'. t1 => t' ↔ (∃ C, t0, t2. context(C) ∧ t1 = C[t0] ∧ t0 =>top t2 ∧ t' = C[t2]) ⊦ t0 _ t1 => t'

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 71:
t0 _ t1 = C[t2], context(C), t2 =>top t, ∀ t'. t0 => t' ↔ (∃ C, t2, t1. context(C) ∧ t0 = C[t2] ∧ t2 =>top t1 ∧ t' = C[t1]), ∀ t'. t1 => t' ↔ (∃ C, t0, t2. context(C) ∧ t1 = C[t0] ∧ t0 =>top t2 ∧ t' = C[t2]) ⊦ t0 _ t1 => C[t]

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]