legal-noncylic-equiv-reaches-nulllegal(H), r ∈ H, r ≠ null ⊦ ¬ cyclic(r, H) ↔ (∃ r0. reachable(r, r0, H) ∧ H[r0] .nxt = null)legal-nxt-1cyclic-weak-def
2037legal-noncylic-equiv-reaches-null-prooflegal-noncylic-equiv-reaches-null-proof-info
The proof is valid.
../../../../specs/challenge4/export/unit.xmlchallenge4
../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reachable-1-def/longlemmainfo.xmlreachable-1-def../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reach-n-path-n/longlemmainfo.xmlreach-n-path-n../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/k-reachable-def/longlemmainfo.xmlk-reachable-def../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reachable-star-def/longlemmainfo.xmlreachable-star-def../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reachable-n-rec-rev/longlemmainfo.xmlreachable-n-rec-rev../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reachable-1-def/longlemmainfo.xmlreachable-1-def../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reach-n-unique/longlemmainfo.xmlreach-n-unique../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reach-alloc/longlemmainfo.xmlreach-alloc../../../../../../lib/basic/specs/list/export/unit.xmllistreflist../../../../../../lib/basic/specs/list/export/e-02/longlemmainfo.xmle-02../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/path-last-not-null/longlemmainfo.xmlpath-last-not-null../../../../../../lib/basic/specs/list-last/export/unit.xmllist-lastreflist../../../../../../lib/basic/specs/list-last/export/last-elim/longlemmainfo.xmllast-elim../../../../../../lib/basic/specs/list-last/export/unit.xmllist-lastreflist../../../../../../lib/basic/specs/list-last/export/l-02/longlemmainfo.xmll-02../../../../../../lib/basic/specs/list-data/export/unit.xmllist-datareflist../../../../../../lib/basic/specs/list-data/export/l/longlemmainfo.xmll../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/path-last/longlemmainfo.xmlpath-last../../../../../../lib/basic/specs/list/export/unit.xmllistreflist../../../../../../lib/basic/specs/list/export/e-01/longlemmainfo.xmle-01../../../../../../lib/basic/specs/nat-basic2/export/unit.xmlnat-basic2../../../../../../lib/basic/specs/nat-basic2/export/eq-01/longlemmainfo.xmleq-01../../../../../../lib/basic/specs/list/export/unit.xmllistreflist../../../../../../lib/basic/specs/list/export/a/longlemmainfo.xmla../../../../../../lib/basic/specs/list/export/unit.xmllistreflist../../../../../../lib/basic/specs/list/export/len-02/longlemmainfo.xmllen-02../../../../../../lib/basic/specs/list/export/unit.xmllistreflist../../../../../../lib/basic/specs/list/export/len/longlemmainfo.xmllen../../../../../../lib/basic/specs/list/export/unit.xmllistreflist../../../../../../lib/basic/specs/list/export/c/longlemmainfo.xmlc../../../../../../lib/basic/specs/list-data/export/unit.xmllist-datareflist../../../../../../lib/basic/specs/list-data/export/size-01/longlemmainfo.xmlsize-01../../../../../../lib/basic/specs/nat-basic2/export/unit.xmlnat-basic2../../../../../../lib/basic/specs/nat-basic2/export/oz/longlemmainfo.xmloz../../../../../../lib/basic/specs/nat-basic2/export/unit.xmlnat-basic2../../../../../../lib/basic/specs/nat-basic2/export/a/longlemmainfo.xmla../../../../../../lib/basic/specs/nat-basic2/export/unit.xmlnat-basic2../../../../../../lib/basic/specs/nat-basic2/export/c/longlemmainfo.xmlc../../../../../../lib/basic/specs/list-data/export/unit.xmllist-datareflist../../../../../../lib/basic/specs/list-data/export/elim-list-c/longlemmainfo.xmlelim-list-c../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/id-reachable/longlemmainfo.xmlid-reachable../../../../../../lib/basic/specs/nat-basic2/export/unit.xmlnat-basic2../../../../../../lib/basic/specs/nat-basic2/export/succ/longlemmainfo.xmlsucc../../../../../../lib/basic/specs/path-reachable/export/unit.xmlpath-reachable../../../../../../lib/basic/specs/path-reachable/export/reachable-n-base/longlemmainfo.xmlreachable-n-base