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fix #4879

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This commit is contained in:
Nikolaj Bjorner 2020-12-12 13:37:25 -08:00
parent 0643e7c0fc
commit f71204c222
4 changed files with 68 additions and 61 deletions
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50
src/ast/rewriter/dl_rewriter.cpp
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@ -24,31 +24,31 @@ Revision History:
ast_manager& m = result.get_manager();
uint64_t v1, v2;
switch(f->get_decl_kind()) {
case datalog::OP_DL_LT:
if (m_util.is_numeral_ext(args[0], v1) &&
m_util.is_numeral_ext(args[1], v2)) {
result = (v1 < v2)?m.mk_true():m.mk_false();
return BR_DONE;
}
// x < x <=> false
if (args[0] == args[1]) {
result = m.mk_false();
return BR_DONE;
}
// x < 0 <=> false
if (m_util.is_numeral_ext(args[1], v2) && v2 == 0) {
result = m.mk_false();
return BR_DONE;
}
// 0 < x <=> 0 != x
if (m_util.is_numeral_ext(args[1], v1) && v1 == 0) {
result = m.mk_not(m.mk_eq(args[0], args[1]));
return BR_DONE;
}
break;
default:
break;
case datalog::OP_DL_LT:
if (m_util.is_numeral_ext(args[0], v1) &&
m_util.is_numeral_ext(args[1], v2)) {
result = m.mk_bool_val(v1 < v2);
return BR_DONE;
}
// x < x <=> false
if (args[0] == args[1]) {
result = m.mk_false();
return BR_DONE;
}
// x < 0 <=> false
if (m_util.is_numeral_ext(args[1], v2) && v2 == 0) {
result = m.mk_false();
return BR_DONE;
}
// 0 < x <=> 0 != x
if (m_util.is_numeral_ext(args[1], v1) && v1 == 0) {
result = m.mk_not(m.mk_eq(args[0], args[1]));
return BR_DONE;
}
break;
default:
break;
}
return BR_FAILED;
}