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Proof step 1 from proof lastoc-C-event (previous step)

proj(tr1, Cview(view)) = [], view(ev1) = C, view(ev) = C ⊦ ev = ev0, ∃ tr2, ev, tr3. ev0 ' + tr + ev1 ' + tr1 = tr2 + ev ' + tr3 ∧ view(ev) = C ∧ proj(tr3, Cview(view)) = [], ¬ ev ∈ tr ∧ ev ≠ ev1 ∧ ¬ ev ∈ tr1

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

[EXRARG : pos: right 2, [QUANTTERMLIST : (ev0 ' + tr, ev1, tr1)]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (tr + tr0) + tr1 = tr + tr0 + tr1])], [EXTRATERMS : (ev0 ' + tr, ev1, tr1)]]