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fix #4831

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This commit is contained in:
Nikolaj Bjorner 2020-11-28 11:01:07 -08:00
parent 6e14d3fbd3
commit 17f04099a5
2 changed files with 22 additions and 0 deletions
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2
src/ast/expr_substitution.h
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@ -51,6 +51,8 @@ public:
void reset();
void cleanup();
obj_map<expr, expr*> const sub() const { return m_subst; }
std::ostream& display(std::ostream& out);
};

20
src/ast/rewriter/th_rewriter.cpp
View file

@ -30,6 +30,7 @@ Notes:
#include "ast/rewriter/seq_rewriter.h"
#include "ast/rewriter/rewriter_def.h"
#include "ast/rewriter/var_subst.h"
#include "ast/rewriter/expr_safe_replace.h"
#include "ast/expr_substitution.h"
#include "ast/ast_smt2_pp.h"
#include "ast/ast_pp.h"
@ -50,6 +51,7 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
recfun_rewriter m_rec_rw;
arith_util m_a_util;
bv_util m_bv_util;
expr_ref_vector m_pinned;
unsigned long long m_max_memory; // in bytes
unsigned m_max_steps;
bool m_pull_cheap_ite;
@ -663,6 +665,20 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
return result;
}
void apply_subst(ptr_buffer<expr>& patterns) {
if (!m_subst)
return;
expr_ref tmp(m());
expr_safe_replace rep(m());
for (auto kv : m_subst->sub())
rep.insert(kv.m_key, kv.m_value);
for (unsigned i = 0; i < patterns.size(); ++i) {
rep(patterns[i], tmp);
m_pinned.push_back(tmp);
patterns[i] = tmp;
}
}
bool reduce_quantifier(quantifier * old_q,
expr * new_body,
@ -721,9 +737,12 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
remove_duplicates(new_patterns_buf);
remove_duplicates(new_no_patterns_buf);
apply_subst(new_patterns_buf);
q1 = m().update_quantifier(old_q,
new_patterns_buf.size(), new_patterns_buf.c_ptr(), new_no_patterns_buf.size(), new_no_patterns_buf.c_ptr(),
new_body);
m_pinned.reset();
TRACE("reduce_quantifier", tout << mk_ismt2_pp(old_q, m()) << "\n----->\n" << mk_ismt2_pp(q1, m()) << "\n";);
SASSERT(is_well_sorted(m(), q1));
if (m().proofs_enabled() && q1 != old_q) {
@ -760,6 +779,7 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
m_rec_rw(m),
m_a_util(m),
m_bv_util(m),
m_pinned(m),
m_used_dependencies(m),
m_subst(nullptr) {
updt_local_params(p);