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fix #4162

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This commit is contained in:
Nikolaj Bjorner 2020-04-30 10:22:46 -07:00
parent 9f6a733ff6
commit 68f1f1e62f
2 changed files with 14 additions and 7 deletions
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20
src/ast/macros/macro_finder.cpp
View file

@ -61,6 +61,13 @@ bool macro_finder::is_arith_macro(expr * n, proof * pr, bool deps_valid, expr_de
if (!m_util.is_arith_macro(body, num_decls, head, def, inv))
return false;
app_ref new_body(m);
func_decl * f = head->get_decl();
// functions introduced within macros are Skolem functions
// To avoid unsound expansion of these as macros (because they
// appear in model conversions and are therefore not fully
// replacable) we prevent these from being treated as macro functions.
if (m_macro_manager.contains(f) || f->is_skolem())
return false;
if (!inv || m.is_eq(body))
new_body = m.mk_app(to_app(body)->get_decl(), head, def);
@ -82,8 +89,7 @@ bool macro_finder::is_arith_macro(expr * n, proof * pr, bool deps_valid, expr_de
}
// is ge or le
//
TRACE("macro_finder", tout << "is_arith_macro: is_ge or is_le\n";);
func_decl * f = head->get_decl();
TRACE("macro_finder", tout << "is_arith_macro: is_ge or is_le " << f->get_name() << "\n";);
func_decl * k = m.mk_fresh_func_decl(f->get_name(), symbol::null, f->get_arity(), f->get_domain(), f->get_range());
app * k_app = m.mk_app(k, head->get_num_args(), head->get_args());
expr_ref_buffer new_rhs_args(m);
@ -132,6 +138,9 @@ bool macro_finder::is_arith_macro(expr * n, proof * pr, vector<justified_expr>&
if (!m_util.is_arith_macro(body, num_decls, head, def, inv))
return false;
app_ref new_body(m);
func_decl * f = head->get_decl();
if (m_macro_manager.contains(f) || f->is_skolem())
return false;
if (!inv || m.is_eq(body))
new_body = m.mk_app(to_app(body)->get_decl(), head, def);
@ -148,12 +157,11 @@ bool macro_finder::is_arith_macro(expr * n, proof * pr, vector<justified_expr>&
new_pr = m.mk_modus_ponens(pr, rw);
}
if (m.is_eq(body)) {
return m_macro_manager.insert(head->get_decl(), new_q, new_pr);
return m_macro_manager.insert(f, new_q, new_pr);
}
// is ge or le
//
TRACE("macro_finder", tout << "is_arith_macro: is_ge or is_le\n";);
func_decl * f = head->get_decl();
func_decl * k = m.mk_fresh_func_decl(f->get_name(), symbol::null, f->get_arity(), f->get_domain(), f->get_range());
app * k_app = m.mk_app(k, head->get_num_args(), head->get_args());
expr_ref_buffer new_rhs_args(m);
@ -289,7 +297,7 @@ bool macro_finder::expand_macros(expr_ref_vector const& exprs, proof_ref_vector
found_new_macro = true;
}
else if (m_util.is_pseudo_predicate_macro(new_n, head, t, def)) {
TRACE("macro_finder", tout << "found new pseudo macro:\n" << head << "\n" << t << "\n" << def << "\n";);
TRACE("macro_finder", tout << "found new pseudo macro:\n" << head->get_decl()->get_name() << "\n" << t << "\n" << def << "\n";);
pseudo_predicate_macro2macro(m, head, t, def, to_quantifier(new_n), new_pr, deps_valid, new_dep, new_exprs, new_prs, new_deps);
found_new_macro = true;
}
@ -300,8 +308,6 @@ bool macro_finder::expand_macros(expr_ref_vector const& exprs, proof_ref_vector
if (deps_valid)
new_deps.push_back(new_dep);
}
TRACE("macro_finder", tout << exprs.size() << " " << deps.size() << " : ";
tout << new_exprs.size() << " " << new_deps.size() << "\n";);
SASSERT(exprs.size() != deps.size() || new_exprs.size() == new_deps.size());
// SASSERT(!m.proofs_enabled() || new_exprs.size() == new_prs.size());

1
src/ast/macros/macro_manager.h
View file

@ -79,6 +79,7 @@ public:
bool is_forbidden(func_decl * d) const { return m_forbidden_set.contains(d); }
obj_hashtable<func_decl> const & get_forbidden_set() const { return m_forbidden_set; }
void display(std::ostream & out);
bool contains(func_decl* d) const { return m_decls.contains(d); }
unsigned get_num_macros() const { return m_decls.size(); }
unsigned get_first_macro_last_level() const { return m_scopes.empty() ? 0 : m_scopes.back().m_decls_lim; }
func_decl * get_macro_func_decl(unsigned i) const { return m_decls.get(i); }