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fixes and more porting seq_eq_solver to self-contained module

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This commit is contained in:
Nikolaj Bjorner 2021-03-04 16:23:22 -08:00
parent 847724fb21
commit 38737db802
21 changed files with 354 additions and 230 deletions
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51
src/smt/theory_seq.cpp
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@ -931,57 +931,6 @@ bool theory_seq::simplify_eq(expr_ref_vector& ls, expr_ref_vector& rs, dependenc
return true;
}
bool theory_seq::solve_itos(expr_ref_vector const& ls, expr_ref_vector const& rs, dependency* dep) {
expr* e = nullptr;
if (rs.size() == 1 && m_util.str.is_itos(rs[0], e) && solve_itos(e, ls, dep))
return true;
if (ls.size() == 1 && m_util.str.is_itos(ls[0], e) && solve_itos(e, rs, dep))
return true;
return false;
}
bool theory_seq::solve_itos(expr* n, expr_ref_vector const& rs, dependency* dep) {
if (rs.empty()) {
literal lit = m_ax.mk_le(n, -1);
propagate_lit(dep, 0, nullptr, lit);
return true;
}
expr* u = nullptr;
for (expr* r : rs) {
if (m_util.str.is_unit(r, u) && !m_is_digit.contains(u)) {
m_is_digit.insert(u);
m_trail_stack.push(insert_obj_trail<expr>(m_is_digit, u));
literal is_digit = m_ax.is_digit(u);
if (ctx.get_assignment(is_digit) != l_true) {
propagate_lit(dep, 0, nullptr, is_digit);
}
}
}
expr_ref num(m), digit(m);
for (expr* r : rs) {
if (!m_util.str.is_unit(r, u))
return false;
digit = m_sk.mk_digit2int(u);
if (!num) {
num = digit;
}
else {
num = m_autil.mk_add(m_autil.mk_mul(m_autil.mk_int(10), num), digit);
}
}
propagate_lit(dep, 0, nullptr, mk_simplified_literal(m.mk_eq(n, num)));
if (rs.size() > 1) {
VERIFY (m_util.str.is_unit(rs[0], u));
digit = m_sk.mk_digit2int(u);
propagate_lit(dep, 0, nullptr, m_ax.mk_ge(digit, 1));
}
return true;
}
bool theory_seq::reduce_length(expr* l, expr* r, literal_vector& lits) {
expr_ref len1(m), len2(m);