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Proof step 7 from proof RED-correct (previous step)

〈RED1(t; tn0): kappa0 〉 tn0 = some(t3), 〈RED1(t; tn0)〉 tn0 = some(t3), 〈RED(t3; t0): kappa0 〉 t0 = t1, t => t3, ¬ t =>* t1 ∨ t1 => t' ⊦ 〈RED(t3; t'): kappa0 〉 t' = t1

Heuristic contract and execute applied rule execute call

And closed the goal!

Rule argument

[fmaposlist-arg: (pos: left 3, pos: right 1)]

Additional information

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