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fix #3286

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-03-14 11:42:26 -07:00
parent 9f6a0a0a48
commit c613ab0ba0
6 changed files with 18 additions and 13 deletions
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2
src/ast/ast.cpp
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@ -2816,7 +2816,7 @@ proof * ast_manager::mk_goal(expr * f) {
}
proof * ast_manager::mk_modus_ponens(proof * p1, proof * p2) {
if (!p1 || !p2) return nullptr;
if (!p2 || !p1) return p1;
SASSERT(has_fact(p1));
SASSERT(has_fact(p2));
CTRACE("mk_modus_ponens", !(is_implies(get_fact(p2)) || is_eq(get_fact(p2)) || is_oeq(get_fact(p2))),