inputs: improve variable names

Author: ekiwi

inputs/coward/add_three.2_bit.smt2

@@ -1,10 +1,10 @@
 ; solver scope 0
-(declare-const tmp (_ BitVec 2))
-(declare-const tmp_0 (_ BitVec 2))
-(declare-const tmp_1 (_ BitVec 2))
-(assert (let ((tmp_2 ((_ extract 0 0) tmp)))
-        (let ((tmp_3 ((_ extract 0 0) tmp_0)))
-        (let ((tmp_4 ((_ extract 0 0) tmp_1)))
+(declare-const a (_ BitVec 2))
+(declare-const b (_ BitVec 2))
+(declare-const c (_ BitVec 2))
+(assert (let ((tmp_2 ((_ extract 0 0) a)))
+        (let ((tmp_3 ((_ extract 0 0) b)))
+        (let ((tmp_4 ((_ extract 0 0) c)))
         (let ((tmp_5 (bvand tmp_4 tmp_3)))
         (let ((tmp_6 (bvxor tmp_5 #b1)))
         (let ((tmp_7 (bvxor tmp_3 #b1)))
@@ -19,9 +19,9 @@
         (let ((tmp_16 (bvand tmp_15 tmp_14)))
         (let ((tmp_17 (bvxor tmp_16 #b1)))
         (let ((tmp_18 (bvand tmp_17 tmp_13)))
-        (let ((tmp_19 ((_ extract 1 1) tmp)))
-        (let ((tmp_20 ((_ extract 1 1) tmp_0)))
-        (let ((tmp_21 ((_ extract 1 1) tmp_1)))
+        (let ((tmp_19 ((_ extract 1 1) a)))
+        (let ((tmp_20 ((_ extract 1 1) b)))
+        (let ((tmp_21 ((_ extract 1 1) c)))
         (let ((tmp_22 (bvand tmp_21 tmp_20)))
         (let ((tmp_23 (bvxor tmp_22 #b1)))
         (let ((tmp_24 (bvxor tmp_20 #b1)))
@@ -53,9 +53,9 @@
         (let ((tmp_50 (bvand tmp_49 tmp_47)))
         (let ((tmp_51 (concat tmp_50 tmp_43)))
         (let ((tmp_52 (concat tmp_51 tmp_18)))
-        (let ((tmp_53 (concat #b0 tmp_1)))
-        (let ((tmp_54 (concat #b0 tmp_0)))
-        (let ((tmp_55 (concat #b0 tmp)))
+        (let ((tmp_53 (concat #b0 c)))
+        (let ((tmp_54 (concat #b0 b)))
+        (let ((tmp_55 (concat #b0 a)))
         (let ((tmp_56 (bvadd tmp_55 tmp_54)))
         (let ((tmp_57 (bvadd tmp_56 tmp_53)))
         (let ((tmp_58 (distinct tmp_57 tmp_52)))