From 6112e47d0d93b675fe220438c3828b5b6025dde6 Mon Sep 17 00:00:00 2001
From: Andrew Reynolds <andrew.j.reynolds@gmail.com>
Date: Thu, 30 Jan 2020 14:47:35 -0600
Subject: Eliminate spurious postprocessing step for single invocation (#3674)

---
 .../quantifiers/sygus/ce_guided_single_inv.cpp     | 28 ----------------------
 .../quantifiers/sygus/ce_guided_single_inv.h       |  1 -
 2 files changed, 29 deletions(-)

(limited to 'src')

diff --git a/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp b/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp
index b6750c5da..0e7606276 100644
--- a/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp
+++ b/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp
@@ -437,33 +437,6 @@ struct sortSiInstanceIndices {
   }
 };
 
-Node CegSingleInv::postProcessSolution(Node n)
-{
-  bool childChanged = false;
-  Kind k = n.getKind();
-  if( n.getKind()==INTS_DIVISION_TOTAL ){
-    k = INTS_DIVISION;
-    childChanged = true;
-  }else if( n.getKind()==INTS_MODULUS_TOTAL ){
-    k = INTS_MODULUS;
-    childChanged = true;
-  }
-  std::vector< Node > children;
-  for( unsigned i=0; i<n.getNumChildren(); i++ ){
-    Node nn = postProcessSolution( n[i] );
-    children.push_back( nn );
-    childChanged = childChanged || nn!=n[i];
-  }
-  if( childChanged ){
-    if( n.hasOperator() && k==n.getKind() ){
-      children.insert( children.begin(), n.getOperator() );
-    }
-    return NodeManager::currentNM()->mkNode( k, children );
-  }else{
-    return n;
-  }
-}
-
 Node CegSingleInv::getSolution(unsigned sol_index,
                                TypeNode stn,
                                int& reconstructed,
@@ -584,7 +557,6 @@ Node CegSingleInv::reconstructToSyntax(Node s,
           d_qe->getTermDatabaseSygus()->getExtRewriter()->extendedRewrite(
               d_solution);
     }
-    d_solution = postProcessSolution( d_solution );
     if( prev!=d_solution ){
       Trace("csi-sol") << "Solution (after post process) : " << d_solution << std::endl;
     }
diff --git a/src/theory/quantifiers/sygus/ce_guided_single_inv.h b/src/theory/quantifiers/sygus/ce_guided_single_inv.h
index 0d5af327e..19caa4c79 100644
--- a/src/theory/quantifiers/sygus/ce_guided_single_inv.h
+++ b/src/theory/quantifiers/sygus/ce_guided_single_inv.h
@@ -49,7 +49,6 @@ class CegSingleInv
                                std::vector< Node >& terms,
                                std::map< Node, std::vector< Node > >& teq,
                                Node n, std::vector< Node >& conj );
-  Node postProcessSolution(Node n);
  private:
   /** pointer to the quantifiers engine */
   QuantifiersEngine* d_qe;
-- 
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