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Bugfix in regex overapproximation

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CEisenhofer 2026-03-16 19:54:12 +01:00
parent 16f693b09a
commit 84d371f2e9
2 changed files with 25 additions and 27 deletions
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17
src/smt/theory_nseq.cpp
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@ -19,9 +19,6 @@ Author:
#include "smt/theory_nseq.h"
#include "smt/smt_context.h"
#include "smt/smt_justification.h"
#include "smt/proto_model/proto_model.h"
#include "ast/array_decl_plugin.h"
#include "ast/ast_pp.h"
#include "util/statistics.h"
#include "util/trail.h"
@ -87,8 +84,9 @@ namespace smt {
bool theory_nseq::internalize_term(app* term) {
// ensure ALL children are internalized (following theory_seq pattern)
for (auto arg : *term)
for (auto arg : *term) {
mk_var(ensure_enode(arg));
}
if (ctx.e_internalized(term)) {
mk_var(ctx.get_enode(term));
@ -102,12 +100,10 @@ namespace smt {
}
enode* en;
if (ctx.e_internalized(term)) {
if (ctx.e_internalized(term))
en = ctx.get_enode(term);
}
else {
else
en = ctx.mk_enode(term, false, m.is_bool(term), true);
}
mk_var(en);
// register in our private sgraph
@ -859,15 +855,10 @@ namespace smt {
// jointly unsatisfiable. Assert a conflict from all their literals.
enode_pair_vector eqs;
literal_vector lits;
std::cout << "CONFLICT:\n";
for (unsigned i : mem_indices) {
mem_source const& src = m_state.get_mem_source(i);
SASSERT(ctx.get_assignment(src.m_lit) == l_true); // we already stored the polarity of the literal
lits.push_back(src.m_lit);
std::cout << "\t\t";
std::cout << mk_pp(ctx.literal2expr(src.m_lit), m) << std::endl;
std::cout << "\t\t";
std::cout << src.m_lit << std::endl;
}
TRACE(seq, tout << "nseq regex precheck: empty intersection for var "
<< var_id << ", conflict with " << lits.size() << " lits\n";);