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fix #4125

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This commit is contained in:
Nikolaj Bjorner 2020-04-27 11:31:02 -07:00
parent a0de244487
commit 1c2aa1076b
6 changed files with 41 additions and 13 deletions
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14
src/tactic/ufbv/ufbv_rewriter.cpp
View file

@ -34,7 +34,8 @@ ufbv_rewriter::ufbv_rewriter(ast_manager & m):
m_new_args(m),
m_rewrite_todo(m),
m_rewrite_cache(m),
m_new_exprs(m) {
m_new_exprs(m),
m_in_processed(m) {
params_ref p;
p.set_bool("elim_and", true);
m_bsimp.updt_params(p);
@ -304,8 +305,9 @@ bool ufbv_rewriter::rewrite_visit_children(app * a) {
expr * v = e;
if (m_rewrite_cache.contains(e)) {
expr_bool_pair const & ebp = m_rewrite_cache.get(e);
if (ebp.second)
if (ebp.second) {
v = ebp.first;
}
}
for (unsigned i = sz; i-- > 0;) {
if (m_rewrite_todo[i] == v) {
@ -342,7 +344,7 @@ expr * ufbv_rewriter::rewrite(expr * n) {
m_rewrite_todo.push_back(n);
while (!m_rewrite_todo.empty()) {
TRACE("demodulator_stack", tout << "STACK: " << std::endl;
for ( unsigned i = 0; i<m_rewrite_todo.size(); i++)
for (unsigned i = 0; i < m_rewrite_todo.size(); i++)
tout << std::dec << i << ": " << std::hex << (size_t)m_rewrite_todo[i] <<
" = " << mk_pp(m_rewrite_todo[i], m) << std::endl;
);
@ -385,7 +387,8 @@ expr * ufbv_rewriter::rewrite(expr * n) {
if (rewrite1(f, m_new_args, np)) {
rewrite_cache(e, np, false);
// No pop.
} else {
}
else {
if (all_untouched) {
rewrite_cache(e, actual, true);
}
@ -398,7 +401,7 @@ expr * ufbv_rewriter::rewrite(expr * n) {
TRACE("demodulator_bug", tout << "e:\n" << mk_pp(e, m) << "\nnew_args: \n";
tout << m_new_args << "\n";
tout << "=====>\n";
tout << "na:\n " << mk_pp(na, m) << "\n";);
tout << "na:\n " << na << "\n";);
rewrite_cache(e, na, true);
}
m_rewrite_todo.pop_back();
@ -654,6 +657,7 @@ void ufbv_rewriter::operator()(unsigned n, expr * const * exprs, proof * const *
if (!is_demodulator(np, large, small)) {
// insert n' into m_processed
m_processed.insert(np);
m_in_processed.push_back(np);
// update m_back_idx (traverse n' and for each uninterpreted function declaration f in n' add the entry f->n' to m_back_idx)
add_back_idx_proc proc(m_back_idx, np);
for_each_expr(proc, np);

1
src/tactic/ufbv/ufbv_rewriter.h
View file

@ -165,6 +165,7 @@ class ufbv_rewriter {
demodulator2lhs_rhs m_demodulator2lhs_rhs;
expr_ref_buffer m_todo;
obj_hashtable<expr> m_processed;
expr_ref_vector m_in_processed;
expr_ref_vector m_new_args;
expr_ref_buffer m_rewrite_todo;