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Character ranges must be passed back to the solver

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This commit is contained in:
CEisenhofer 2026-04-09 15:21:12 +02:00
parent aafb704cf8
commit 09572b20ed
2 changed files with 22 additions and 18 deletions
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9
src/smt/seq_model.cpp
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@ -48,7 +48,7 @@ namespace smt {
// solve integer constraints from the sat_path FIRST so that
// m_int_model is available when snode_to_value evaluates power exponents
nielsen.solve_sat_path_raw(m_int_model);
VERIFY(nielsen.solve_sat_path_raw(m_int_model));
// extract variable assignments from the satisfying leaf's substitution path
extract_assignments(nielsen.sat_path());
@ -171,11 +171,14 @@ namespace smt {
if (n->is_char() || n->is_unit()) {
expr* e = n->get_expr();
SASSERT(m_seq.str.is_unit(e));
e = to_app(e)->get_arg(0);
expr_ref val(m);
if (e && m_int_model) {
unsigned c;
m_int_model->eval_expr(e, val, true);
if (val)
return val;
if (val && m_seq.is_const_char(val, c))
return expr_ref(m_seq.str.mk_string(zstring(c)), m);
}
return e ? expr_ref(e, m) : expr_ref(m);
}