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Proof step 75 from proof ks-RED1 (previous step)

〈RED1(ks(n0); tn)〉 tn = tn0, tn0 = none → n0 ≤ 1, tn0 ≠ none → ¬ n0 ≤ 1 ∧ tn0 = some(ks(n0 - 2)), ¬ (ap(ks(n0)) ∧ ks(n0) .1 = K ∧ value(ks(n0) .2)), ¬ (ap(ks(n0)) ∧ ap(ks(n0) .1) ∧ ks(n0) .1 .1 = S) ⊦ 〈RED1(ks(n0); tn)〉〈if tn ≠ none then tn := some(tn .t _ K) else if value(ks(n0)) then { RED1(K; tn) ; if tn ≠ none then tn := some(ks(n0) _ tn .t) }〉 ((tn = none → n0 = 0) ∧ (tn ≠ none → n0 ≠ 0 ∧ tn = some(ks(n0 + 1 - 2))))

Heuristic contract and execute applied rule execute call

And obtained the following new goals

Proof step 74:
〈RED1(ks(n0); tn)〉 tn = tn1, tn0 = none → n0 ≤ 1, tn0 ≠ none → ¬ n0 ≤ 1 ∧ tn0 = some(ks(n0 - 2)), ¬ (ap(ks(n0)) ∧ ks(n0) .1 = K ∧ value(ks(n0) .2)), ¬ (ap(ks(n0)) ∧ ap(ks(n0) .1) ∧ ks(n0) .1 .1 = S), tn1 = tn0 ⊦ 〈if tn1 ≠ none then tn1 := some(tn1 .t _ K) else if value(ks(n0)) then { RED1(K; tn1) ; if tn1 ≠ none then tn1 := some(ks(n0) _ tn1 .t) }〉 ((tn1 = none → n0 = 0) ∧ (tn1 ≠ none → n0 ≠ 0 ∧ tn1 = some(ks(n0 + 1 - 2))))

Rule argument

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

Additional information

[[CONCRETESIMPRULES : ()]]