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datalog: fix compilation for rules like a(X) :- not b(X).

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Signed-off-by: Nuno Lopes <a-nlopes@microsoft.com>
This commit is contained in:
Nuno Lopes 2015-01-29 20:41:22 +00:00
parent 4be2f608f1
commit 6017dcace3
1 changed files with 1 additions and 1 deletions
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2
src/muz/rel/dl_compiler.cpp
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@ -857,7 +857,7 @@ namespace datalog {
ast_manager& m = m_context.get_manager();
unsigned pt_len = r->get_positive_tail_size();
unsigned ut_len = r->get_uninterpreted_tail_size();
if (pt_len == ut_len || pt_len == 0) {
if (pt_len == ut_len) {
return;
}
// populate negative variables: