From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Wed, 27 Nov 2019 21:59:36 +0000 (-0600)
Subject: Fix sygus inference for choice functions introduced at preprocess (#3500)
X-Git-Tag: cvc5-1.0.0~3819
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5e2d39ccd22f38c6a3f2aab24136b07b65b3f81e;p=cvc5.git

Fix sygus inference for choice functions introduced at preprocess (#3500)
---

diff --git a/src/preprocessing/passes/sygus_inference.cpp b/src/preprocessing/passes/sygus_inference.cpp
index 930edf869..6708f3c3a 100644
--- a/src/preprocessing/passes/sygus_inference.cpp
+++ b/src/preprocessing/passes/sygus_inference.cpp
@@ -202,7 +202,7 @@ bool SygusInference::solveSygus(std::vector<Node>& assertions,
                  == free_functions.end());
           free_functions.push_back(cur);
         }
-        else if (cur.getKind() == FORALL)
+        else if (cur.isClosure())
         {
           Trace("sygus-infer")
               << "...fail: non-top-level quantifier." << std::endl;
diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt
index 2182beaa8..e7252834e 100644
--- a/test/regress/CMakeLists.txt
+++ b/test/regress/CMakeLists.txt
@@ -1722,6 +1722,7 @@ set(regress_1_tests
   regress1/sygus/issue3247.smt2
   regress1/sygus/issue3320-quant.sy
   regress1/sygus/issue3461.sy
+  regress1/sygus/issue3498.smt2
   regress1/sygus/large-const-simp.sy
   regress1/sygus/let-bug-simp.sy
   regress1/sygus/list-head-x.sy
diff --git a/test/regress/regress1/sygus/issue3498.smt2 b/test/regress/regress1/sygus/issue3498.smt2
new file mode 100644
index 000000000..9fa8fdc1e
--- /dev/null
+++ b/test/regress/regress1/sygus/issue3498.smt2
@@ -0,0 +1,7 @@
+; EXPECT: sat
+; COMMAND-LINE: --sygus-inference --no-check-models
+(set-logic ALL)
+(declare-fun x () Real)
+(assert (= x 1))
+(assert (= (sqrt x) x))
+(check-sat)