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-rw-r--r--src/theory/quantifiers/term_database.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/theory/quantifiers/term_database.cpp b/src/theory/quantifiers/term_database.cpp
index ae9426172..e3cf15c53 100644
--- a/src/theory/quantifiers/term_database.cpp
+++ b/src/theory/quantifiers/term_database.cpp
@@ -1944,7 +1944,8 @@ Node TermDb::simpleNegate( Node n ){
bool TermDb::isAssoc( Kind k ) {
return k==PLUS || k==MULT || k==AND || k==OR || k==XOR || k==IFF ||
- k==BITVECTOR_PLUS || k==BITVECTOR_MULT || k==BITVECTOR_AND || k==BITVECTOR_OR || k==BITVECTOR_XOR || k==BITVECTOR_XNOR || k==BITVECTOR_CONCAT;
+ k==BITVECTOR_PLUS || k==BITVECTOR_MULT || k==BITVECTOR_AND || k==BITVECTOR_OR || k==BITVECTOR_XOR || k==BITVECTOR_XNOR || k==BITVECTOR_CONCAT ||
+ k==STRING_CONCAT;
}
bool TermDb::isComm( Kind k ) {
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