Add special {SGE,SGT,NE}_UDIV1 side conditions for BV of size 1. (#1483)

This commit further fixes some other issues with bit-vectors of size 1.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/theory/bv/theory_bv_utils.h b/src/theory/bv/theory_bv_utils.h
index ed772b7c4..a11436c9e 100644
--- a/src/theory/bv/theory_bv_utils.h
+++ b/src/theory/bv/theory_bv_utils.h
@@ -195,6 +195,18 @@ inline BitVector mkBitVectorOnes(unsigned size) {
   return BitVector(1, Integer(1)).signExtend(size - 1); 
 }
 
+inline BitVector mkBitVectorMinSigned(unsigned size)
+{
+  Assert(size > 0);
+  return BitVector(size).setBit(size - 1);
+}
+
+inline BitVector mkBitVectorMaxSigned(unsigned size)
+{
+  Assert(size > 0);
+  return ~mkBitVectorMinSigned(size);
+}
+
 inline Node mkOnes(unsigned size) {
   BitVector val = mkBitVectorOnes(size); 
   return NodeManager::currentNM()->mkConst<BitVector>(val);