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fix #1729

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-07-05 07:17:08 -07:00
parent adb9a1c797
commit f96133f4d9
4 changed files with 33 additions and 7 deletions
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25
src/ast/rewriter/bit_blaster/bit_blaster_rewriter.cpp
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@ -89,6 +89,7 @@ struct blaster_rewriter_cfg : public default_rewriter_cfg {
expr_ref_vector m_out;
obj_map<func_decl, expr*> m_const2bits;
expr_ref_vector m_bindings;
unsigned_vector m_shifts;
func_decl_ref_vector m_keys;
expr_ref_vector m_values;
unsigned_vector m_keyval_lim;
@ -579,19 +580,36 @@ MK_PARAMETRIC_UNARY_REDUCE(reduce_sign_extend, mk_sign_extend);
}
SASSERT(new_bindings.size() == q->get_num_decls());
i = q->get_num_decls();
unsigned shift = j;
if (!m_shifts.empty()) shift += m_shifts.back();
while (i > 0) {
i--;
m_bindings.push_back(new_bindings[i]);
m_shifts.push_back(shift);
}
}
return true;
}
bool reduce_var(var * t, expr_ref & result, proof_ref & result_pr) {
if (m_blast_quant) {
if (t->get_idx() >= m_bindings.size())
if (m_blast_quant) {
if (m_bindings.empty())
return false;
result = m_bindings.get(m_bindings.size() - t->get_idx() - 1);
unsigned shift = m_shifts.back();
if (t->get_idx() >= m_bindings.size()) {
if (shift == 0)
return false;
result = m_manager.mk_var(t->get_idx() + shift, t->get_sort());
}
else {
unsigned offset = m_bindings.size() - t->get_idx() - 1;
result = m_bindings.get(offset);
shift = shift - m_shifts[offset];
if (shift > 0) {
var_shifter vs(m_manager);
vs(result, shift, result);
}
}
result_pr = nullptr;
return true;
}
@ -641,6 +659,7 @@ MK_PARAMETRIC_UNARY_REDUCE(reduce_sign_extend, mk_sign_extend);
old_q->get_num_patterns(), new_patterns, old_q->get_num_no_patterns(), new_no_patterns);
result_pr = nullptr;
m_bindings.shrink(old_sz);
m_shifts.shrink(old_sz);
return true;
}
};