From d9923e1928a158c915a71ce0addb766a1e9986ca Mon Sep 17 00:00:00 2001
From: lianah <lianahady@gmail.com>
Date: Mon, 17 Nov 2014 18:40:26 -0500
Subject: [PATCH] added command line option for extractArith bv rewrite

---
 src/theory/bv/options                |  3 +++
 src/theory/bv/theory_bv_rewriter.cpp | 11 +++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/theory/bv/options b/src/theory/bv/options
index 775a46088..801dec0db 100644
--- a/src/theory/bv/options
+++ b/src/theory/bv/options
@@ -45,6 +45,9 @@ option bitvectorToBool --bv-to-bool bool :default false :read-write
 option bitvectorDivByZeroConst --bv-div-zero-const bool :default false
  always return -1 on division by zero
 
+expert-option bvExtractArithRewrite --bv-extract-arith bool :default false :read-write
+ enable rewrite pushing extract [i:0] over arithmetic operations (can blow up)
+ 
 expert-option bvAbstraction --bv-abstraction bool :default false :read-write
  mcm benchmark abstraction 
 
diff --git a/src/theory/bv/theory_bv_rewriter.cpp b/src/theory/bv/theory_bv_rewriter.cpp
index dc91c338b..86f2c6760 100644
--- a/src/theory/bv/theory_bv_rewriter.cpp
+++ b/src/theory/bv/theory_bv_rewriter.cpp
@@ -16,6 +16,7 @@
  **/
 
 #include "theory/theory.h"
+#include "theory/bv/options.h"
 #include "theory/bv/theory_bv_rewriter.h"
 #include "theory/bv/theory_bv_rewrite_rules.h"
 #include "theory/bv/theory_bv_rewrite_rules_core.h"
@@ -178,10 +179,12 @@ RewriteResponse TheoryBVRewriter::RewriteExtract(TNode node, bool prerewrite) {
     return RewriteResponse(REWRITE_AGAIN_FULL, resultNode); 
   }
 
-  // if (RewriteRule<ExtractArith>::applies(node)) {
-  //   resultNode = RewriteRule<ExtractArith>::run<false>(node);
-  //   return RewriteResponse(REWRITE_AGAIN_FULL, resultNode); 
-  // }
+  if (options::bvExtractArithRewrite()) {
+    if (RewriteRule<ExtractArith>::applies(node)) {
+      resultNode = RewriteRule<ExtractArith>::run<false>(node);
+      return RewriteResponse(REWRITE_AGAIN_FULL, resultNode); 
+    }
+  }
 
   
   resultNode = LinearRewriteStrategy
-- 
2.30.2