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Using only one solver

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CEisenhofer 2026-05-07 15:49:16 +02:00
parent 712cd68e8c
commit f7f2ee8f74
8 changed files with 154 additions and 108 deletions
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33
src/smt/seq_model.cpp
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@ -479,6 +479,26 @@ namespace smt {
return val;
}
// Gets the arithmetic value of e. In QF_SLIA mode theory_lra does not register
// numeral constants as LP variables, so get_value_equiv misses cases like
// (str.len w) being equivalent to numeral 5 via EUF. Walking the EUF class
// and checking for numerals directly handles this.
bool seq_model::get_arith_value(expr* e, rational& val) const {
if (!m_ctx.e_internalized(e))
return false;
arith_util a(m);
enode* root = m_ctx.get_enode(e);
enode* it = root;
do {
if (a.is_numeral(it->get_expr(), val))
return true;
it = it->get_next();
} while (it != root);
arith_value avalue(m);
avalue.init(const_cast<context*>(&m_ctx));
return avalue.get_value_equiv(e, val);
}
rational seq_model::int_value(expr *_e) {
expr_ref e(_e, m);
m_ctx.get_rewriter()(e);
@ -487,9 +507,7 @@ namespace smt {
if (a.is_numeral(e, val))
return val;
arith_value avalue(m);
avalue.init(&m_ctx);
bool has_val = avalue.get_value(e, val);
bool has_val = get_arith_value(e, val);
CTRACE(seq, !has_val, tout << "no value associated with " << mk_pp(e, m) << "\n";);
return val;
}
@ -508,11 +526,9 @@ namespace smt {
SASSERT(re_expr);
arith_util arith(m);
arith_value avalue(m);
avalue.init(&m_ctx);
expr_ref len_expr(m_seq.str.mk_length(var->get_expr()), m);
rational len_val;
bool has_len = avalue.get_value(len_expr, len_val);
bool has_len = get_arith_value(len_expr, len_val);
CTRACE(seq, !has_len, tout << "no value associated with " << mk_pp(len_expr, m) << "\n";);
if (has_len && len_val.is_unsigned()) {
@ -539,10 +555,7 @@ namespace smt {
arith_util arith(m);
expr_ref len_expr(m_seq.str.mk_length(var->get_expr()), m);
rational len_val;
arith_value avalue(m);
avalue.init(&m_ctx);
bool has_len = avalue.get_value(len_expr, len_val);
bool has_len = get_arith_value(len_expr, len_val);
CTRACE(seq, !has_len, tout << "no value associated with " << mk_pp(len_expr, m) << "\n";);