From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Mon, 9 Apr 2018 20:29:08 +0000 (-0500)
Subject: Fix sygus substr static symmetry breaking (#1761)
X-Git-Tag: cvc5-1.0.0~5166
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=51824dbdc2a8c19cbae7c76826732ae2f319111d;p=cvc5.git

Fix sygus substr static symmetry breaking (#1761)
---

diff --git a/src/theory/quantifiers/sygus/term_database_sygus.cpp b/src/theory/quantifiers/sygus/term_database_sygus.cpp
index 5c073aa0d..c8d7bf04d 100644
--- a/src/theory/quantifiers/sygus/term_database_sygus.cpp
+++ b/src/theory/quantifiers/sygus/term_database_sygus.cpp
@@ -555,7 +555,8 @@ bool TermDbSygus::considerConst( const Datatype& pdt, TypeNode tnp, Node c, Kind
         }
       }
     }else if( pk==STRING_SUBSTR ){
-      if( c==one_c ){
+      if (c == one_c && arg == 2)
+      {
         rt.d_req_kind = STRING_CHARAT;
         rt.d_children[0].d_req_type = getArgType( pdt[pc], 0 );
         rt.d_children[1].d_req_type = getArgType( pdt[pc], 1 );