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Proof step 11 from proof lemma4 (previous step)

⊦ cdom(co) ∈ sources(co ' + cl, d), eqds(sys, sources(cl, d), step(sys, co))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ sources(co ' + cl, d) = (((∃ d0. d0 ∈ sources(cl, d) ∧ cdom(co) ⇒ d0) ⊃ sources(cl, d) ++ cdom(co); sources(cl, d)))

Rule argument

[x0lemmaarg: spec-name: instance-name: lemma-name: sources-rec antecedent: succedent: sources(co ' + cl, d) = (((∃ d0. d0 ∈ sources(cl, d) ∧ cdom(co) ⇒ d0) ⊃ sources(cl, d) ++ cdom(co) ; sources(cl, d) ) ) substlist: [d, cl, co] → [d, cl, co] add preconditions?: F is rewrite lemma?: T current spec?: T rotate lemma?: F replace all?: T paths: ((1, 0, 0, 1, 1)) dummy: () ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (d, cl, co)]]