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FPA: bugfix for quantified FP -> quantified BV conversion.

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Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
This commit is contained in:
Christoph M. Wintersteiger 2013-05-07 17:58:43 +01:00
parent a7269f56f9
commit b65adc10da
1 changed files with 21 additions and 20 deletions
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41
src/tactic/fpa/fpa2bv_rewriter.h
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@ -166,9 +166,11 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
bool pre_visit(expr * t)
{
TRACE("fpa2bv", tout << "pre_visit: " << mk_ismt2_pp(t, m()) << std::endl;);
if (is_quantifier(t)) {
quantifier * q = to_quantifier(t);
TRACE("fpa2bv", tout << "pre_visit [" << q->get_id() << "]: " << mk_ismt2_pp(q->get_expr(), m()) << std::endl;);
TRACE("fpa2bv", tout << "pre_visit quantifier [" << q->get_id() << "]: " << mk_ismt2_pp(q->get_expr(), m()) << std::endl;);
sort_ref_vector new_bindings(m_manager);
for (unsigned i = 0 ; i < q->get_num_decls(); i++)
new_bindings.push_back(q->get_decl_sort(i));
@ -199,17 +201,9 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
unsigned ebits = m_conv.fu().get_ebits(s);
unsigned sbits = m_conv.fu().get_sbits(s);
name_buffer.reset();
name_buffer << n << ".exp";
name_buffer << n << ".bv";
new_decl_names.push_back(symbol(name_buffer.c_str()));
new_decl_sorts.push_back(m_conv.bu().mk_sort(ebits));
name_buffer.reset();
name_buffer << n << ".sig";
new_decl_names.push_back(symbol(name_buffer.c_str()));
new_decl_sorts.push_back(m_conv.bu().mk_sort(sbits-1));
name_buffer.reset();
name_buffer << n << ".sgn";
new_decl_names.push_back(symbol(name_buffer.c_str()));
new_decl_sorts.push_back(m_conv.bu().mk_sort(1));
new_decl_sorts.push_back(m_conv.bu().mk_sort(sbits+ebits));
}
else {
new_decl_sorts.push_back(s);
@ -231,19 +225,26 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
bool reduce_var(var * t, expr_ref & result, proof_ref & result_pr) {
if (t->get_idx() >= m_bindings.size())
return false;
return false;
unsigned inx = m_bindings.size() - t->get_idx() - 1;
if (m_mappings[inx] == 0)
{
unsigned shift = 0;
for (unsigned i = m_bindings.size() - 1; i > inx; i--)
if (m_conv.is_float(m_bindings[i].get())) shift += 2;
expr_ref new_var(m());
if (m_conv.is_float(t->get_sort()))
m_conv.mk_var(t->get_idx() + shift, t->get_sort(), new_var);
expr_ref new_exp(m());
sort * s = t->get_sort();
if (m_conv.is_float(s))
{
expr_ref new_var(m());
unsigned ebits = m_conv.fu().get_ebits(s);
unsigned sbits = m_conv.fu().get_sbits(s);
new_var = m().mk_var(t->get_idx(), m_conv.bu().mk_sort(sbits+ebits));
m_conv.mk_triple(m_conv.bu().mk_extract(sbits+ebits-1, sbits+ebits-1, new_var),
m_conv.bu().mk_extract(sbits+ebits-2, ebits, new_var),
m_conv.bu().mk_extract(ebits-1, 0, new_var),
new_exp);
}
else
new_var = m().mk_var(t->get_idx() + shift, t->get_sort());
m_mappings[inx] = new_var;
new_exp = m().mk_var(t->get_idx(), s);
m_mappings[inx] = new_exp;
}
result = m_mappings[inx].get();
result_pr = 0;