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edits to seq_nielsen

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2026-03-30 17:36:27 -07:00
parent 9aceaf3cac
commit 6d2321e6fe
3 changed files with 42 additions and 32 deletions
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4
src/ast/euf/euf_sgraph.cpp
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@ -580,6 +580,10 @@ namespace euf {
return mk(result);
}
bool sgraph::are_unit_distinct(snode* a, snode* b) const {
return a->is_char_or_unit() && b->is_char_or_unit() && m.are_distinct(a->get_expr(), b->get_expr());
}
void sgraph::collect_re_predicates(snode* re, expr_ref_vector& preds) {
if (!re)
return;

3
src/ast/euf/euf_sgraph.h
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@ -124,6 +124,9 @@ namespace euf {
sort* get_str_sort() const { return m_str_sort; }
// return true if a, b are of the same length and distinct
bool are_unit_distinct(snode *a, snode *b) const;
// factory methods for creating snodes with corresponding expressions
snode* mk_var(symbol const& name, sort* s);
snode* mk_char(unsigned ch);