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Proof step 4 from proof tr-fold (previous step)

(r => mknode(r0, a, r1) * tr(r0, t0) * tr(r1, t1) * P)(H) ⊦ (∃ r0, r1. ((r => mknode(r0, a, r1) * tr(r0, t0) * tr(r1, t1)) * P)(H)) ∧ true

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
(r => mknode(r0, a, r1) * tr(r0, t0) * tr(r1, t1) * P)(H) ⊦ ∃ r0, r1. ((r => mknode(r0, a, r1) * tr(r0, t0) * tr(r1, t1)) * P)(H)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]