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try th_lemma, update documentation of api functions for creating strings

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-12-01 09:21:02 -08:00
parent 3b4f976118
commit c6a5aa0cc4
3 changed files with 15 additions and 13 deletions
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7
src/api/z3_api.h
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@ -3451,6 +3451,10 @@ extern "C" {
/**
\brief Create a sort for unicode strings.
The sort for characters can be changed to ASCII by setting
the global parameter \c encoding to \c ascii, or alternative
to 16 bit characters by setting \c encoding to \c bmp.
def_API('Z3_mk_string_sort', SORT, (_in(CONTEXT), ))
*/
Z3_sort Z3_API Z3_mk_string_sort(Z3_context c);
@ -3459,7 +3463,8 @@ extern "C" {
\brief Create a sort for unicode characters.
The sort for characters can be changed to ASCII by setting
the global parameter \c unicode to \c false.
the global parameter \c encoding to \c ascii, or alternative
to 16 bit characters by setting \c encoding to \c bmp.
def_API('Z3_mk_char_sort', SORT, (_in(CONTEXT), ))
*/

7
src/smt/smt_theory.cpp
View file

@ -150,6 +150,13 @@ namespace smt {
literal theory::mk_literal(expr* _e) {
expr_ref e(_e, m);
if (has_quantifiers(e)) {
expr_ref fn(m.mk_fresh_const("aux-literal", m.mk_bool_sort()), m);
expr_ref eq(m.mk_eq(fn, e), m);
ctx.assert_expr(eq);
ctx.internalize_assertions();
return mk_literal(fn);
}
bool is_not = m.is_not(_e, _e);
if (!ctx.e_internalized(_e)) {
ctx.internalize(_e, is_quantifier(_e));

14
src/smt/theory_user_propagator.cpp
View file

@ -146,20 +146,10 @@ void theory_user_propagator::propagate() {
lit.neg();
for (auto const& [a,b] : m_eqs)
m_lits.push_back(~mk_eq(a->get_expr(), b->get_expr(), false));
literal lit;
if (has_quantifiers(prop.m_conseq)) {
expr_ref fn(m.mk_fresh_const("user-conseq", m.mk_bool_sort()), m);
expr_ref eq(m.mk_eq(fn, prop.m_conseq), m);
ctx.assert_expr(eq);
ctx.internalize_assertions();
lit = mk_literal(fn);
}
else {
lit = mk_literal(prop.m_conseq);
}
literal lit = mk_literal(prop.m_conseq);
ctx.mark_as_relevant(lit);
m_lits.push_back(lit);
ctx.mk_th_axiom(get_id(), m_lits);
ctx.mk_th_lemma(get_id(), m_lits);
TRACE("user_propagate", ctx.display(tout););
}
++m_stats.m_num_propagations;