merge

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
Z3Prover · May 26, 2020 · 33cdc06 · 33cdc06
1 parent a1991d8
commit 33cdc06
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/smt/seq_regex.cpp b/src/smt/seq_regex.cpp
@@ -299,7 +299,7 @@ namespace smt {
     }
 
     /**
-       nonempty(R union Q, Seen) = R = {} or Q = {}
+       nonempty(R union Q, Seen) = R != {} or Q != {}
        nonempty(R[if(p,R1,R2)], Seen) = if(p, nonempty(R[R1], Seen), nonempty(R[R2], Seen))           (co-factor)
        nonempty(R, Seen) = nullable(R) or (R not in Seen and nonempty(D(first(R),R), Seen u { R }))  (derivative)