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fix #4826

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This commit is contained in:
Nikolaj Bjorner 2020-11-27 10:42:02 -08:00
parent f58618aa04
commit 1619311ff7
4 changed files with 20 additions and 7 deletions
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16
src/ast/rewriter/arith_rewriter.cpp
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@ -480,10 +480,12 @@ expr * arith_rewriter::reduce_power(expr * arg, bool is_eq) {
if (m_util.is_power(arg, arg0, arg1) && m_util.is_numeral(arg1, k) && k.is_int() &&
((is_eq && k > rational(1)) || (!is_eq && k > rational(2)))) {
if (is_eq || !k.is_even()) {
if (m_util.is_int(arg0))
arg0 = m_util.mk_to_real(arg0);
new_args.push_back(arg0);
}
else {
new_args.push_back(mk_power(arg0, rational(2)));
new_args.push_back(m_util.mk_power(arg0, m_util.mk_real(2)));
}
}
else {
@ -1245,11 +1247,19 @@ br_status arith_rewriter::mk_rem_core(expr * arg1, expr * arg2, expr_ref & resul
return BR_FAILED;
}
app* arith_rewriter_core::mk_power(expr* x, rational const& r) {
expr* arith_rewriter_core::coerce(expr* x, sort* s) {
if (m_util.is_int(x) && m_util.is_real(s))
return m_util.mk_to_real(x);
if (m_util.is_real(x) && m_util.is_int(s))
return m_util.mk_to_int(x);
return x;
}
app* arith_rewriter_core::mk_power(expr* x, rational const& r, sort* s) {
SASSERT(r.is_unsigned() && r.is_pos());
bool is_int = m_util.is_int(x);
app* y = m_util.mk_power(x, m_util.mk_numeral(r, is_int));
if (is_int)
if (m_util.is_int(s))
y = m_util.mk_to_int(y);
return y;
}