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Improved support for FPA unspecified min/max values, model validation, and proof generation.

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This commit is contained in:
Christoph M. Wintersteiger 2015-10-21 20:11:59 +01:00
parent ca496f20cb
commit 9b5abcd55a
8 changed files with 192 additions and 106 deletions
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32
src/smt/theory_fpa.cpp
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@ -74,7 +74,9 @@ namespace smt {
}
else {
SASSERT(is_rm(f->get_range()));
result = m_th.wrap(m.mk_const(f));
expr_ref bv(m);
bv = m_th.wrap(m.mk_const(f));
mk_rm(bv, result);
m_rm_const2bv.insert(f, result);
m.inc_ref(f);
m.inc_ref(result);
@ -83,7 +85,7 @@ namespace smt {
void theory_fpa::fpa2bv_converter_wrapped::mk_uninterpreted_function(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
// TODO: This introduces temporary variables/func_decls that should be filtered in the end.
return fpa2bv_converter::mk_uninterpreted_function(f, num, args, result);
fpa2bv_converter::mk_uninterpreted_function(f, num, args, result);
}
expr_ref theory_fpa::fpa2bv_converter_wrapped::mk_min_unspecified(func_decl * f, expr * x, expr * y) {
@ -106,7 +108,6 @@ namespace smt {
expr_ref sc(m);
m_th.m_converter.mk_is_zero(res, sc);
m_extra_assertions.push_back(sc);
//m_extra_assertions.push_back(m.mk_eq(m_th.unwrap(wrapped, f->get_range()), a));
return res;
}
@ -130,7 +131,6 @@ namespace smt {
expr_ref sc(m);
m_th.m_converter.mk_is_zero(res, sc);
m_extra_assertions.push_back(sc);
//m_extra_assertions.push_back(m.mk_eq(m_th.unwrap(wrapped, f->get_range()), a));
return res;
}
@ -349,11 +349,14 @@ namespace smt {
}
}
else if (m_fpa_util.is_rm(e)) {
SASSERT(is_sort_of(m.get_sort(e_conv), m_bv_util.get_family_id(), BV_SORT));
SASSERT(m_bv_util.get_bv_size(e_conv) == 3);
m_th_rw(e_conv, res);
SASSERT(is_app_of(e_conv, get_family_id(), OP_FPA_INTERNAL_RM));
expr_ref bv_rm(m);
bv_rm = to_app(e_conv)->get_arg(0);
m_th_rw(bv_rm);
m_converter.mk_rm(bv_rm, res);
}
else if (m_fpa_util.is_float(e)) {
else if (m_fpa_util.is_float(e)) {
SASSERT(is_app_of(e_conv, get_family_id(), OP_FPA_FP));
expr_ref sgn(m), sig(m), exp(m);
m_converter.split_fp(e_conv, sgn, exp, sig);
m_th_rw(sgn);
@ -440,7 +443,7 @@ namespace smt {
sort * srt = m.get_sort(e);
expr_ref res(m);
if (m_fpa_util.is_rm(srt)) {
res = to_app(e)->get_arg(0);
m_converter.mk_rm(to_app(e)->get_arg(0), res);
}
else {
SASSERT(m_fpa_util.is_float(srt));
@ -468,7 +471,6 @@ namespace smt {
TRACE("t_fpa_detail", tout << "cached:" << std::endl;
tout << mk_ismt2_pp(e, m) << std::endl << " -> " << std::endl <<
mk_ismt2_pp(res, m) << std::endl;);
return res;
}
else {
if (m_fpa_util.is_unwrap(e))
@ -490,7 +492,7 @@ namespace smt {
m.inc_ref(res);
m_trail_stack.push(fpa2bv_conversion_trail_elem(m, m_conversions, e));
}
return res;
}
@ -663,7 +665,8 @@ namespace smt {
expr_ref c(m);
if (fu.is_float(xe) && fu.is_float(ye))
if ((fu.is_float(xe) && fu.is_float(ye)) ||
(fu.is_rm(xe) && fu.is_rm(ye)))
m_converter.mk_eq(xc, yc, c);
else
c = m.mk_eq(xc, yc);
@ -682,7 +685,7 @@ namespace smt {
TRACE("t_fpa", tout << "new diseq: " << x << " != " << y << std::endl;);
TRACE("t_fpa_detail", tout << mk_ismt2_pp(get_enode(x)->get_owner(), m) << " != " <<
mk_ismt2_pp(get_enode(y)->get_owner(), m) << std::endl;);
mk_ismt2_pp(get_enode(y)->get_owner(), m) << std::endl;);
fpa_util & fu = m_fpa_util;
@ -699,7 +702,8 @@ namespace smt {
expr_ref c(m);
if (fu.is_float(xe) && fu.is_float(ye)) {
if ((fu.is_float(xe) && fu.is_float(ye))||
(fu.is_rm(xe) && fu.is_rm(ye))) {
m_converter.mk_eq(xc, yc, c);
c = m.mk_not(c);
}