Add posRewriteEqual to bags rewriter (#5498)

This PR fixes #5460 by adding posRewriteEqual to bags rewriter

1 files changed, 9 insertions, 1 deletions

diff --git a/src/theory/bags/bags_rewriter.h b/src/theory/bags/bags_rewriter.h
index 8be6b948a..a9b3b90bb 100644
--- a/src/theory/bags/bags_rewriter.h
+++ b/src/theory/bags/bags_rewriter.h
@@ -60,7 +60,7 @@ class BagsRewriter : public TheoryRewriter
    * rewrites for n include:
    * - (= A A) = true where A is a bag
    */
-  BagsRewriteResponse rewriteEqual(const TNode& n) const;
+  BagsRewriteResponse preRewriteEqual(const TNode& n) const;
 
   /**
    * rewrites for n include:
@@ -202,6 +202,14 @@ class BagsRewriter : public TheoryRewriter
    */
   BagsRewriteResponse rewriteToSet(const TNode& n) const;
 
+  /**
+   *  rewrites for n include:
+   *  - (= A A) = true
+   *  - (= A B) = false if A and B are different bag constants
+   *  - (= B A) = (= A B) if A < B and at least one of A or B is not a constant
+   */
+  BagsRewriteResponse postRewriteEqual(const TNode& n) const;
+
  private:
   /** Reference to the rewriter statistics. */
   NodeManager* d_nm;