--- a/src/llrb/CMakeLists.txt	Tue Feb 02 16:02:55 2016 +0900
+++ b/src/llrb/CMakeLists.txt	Tue Feb 02 16:12:34 2016 +0900
@@ -22,5 +22,6 @@
                allocate.c
                compare.c
                stack.c
+               verifier/llrbContextWithVerifier.c
                verifier/verify_put_cs.c
 )

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/llrb/verifier/llrbContextWithVerifier.c	Tue Feb 02 16:12:34 2016 +0900
@@ -0,0 +1,45 @@
+#include "llrbContextWithVerifier.h"
+
+unsigned int min_height(struct Node* node, unsigned int height) {
+    if ((node->left == NULL) && (node->right == NULL)) return height;
+    if (node->left  == NULL) return min_height(node->right, height+1);
+    if (node->right == NULL) return min_height(node->left, height+1);
+
+    unsigned int left_min  = min_height(node->left, height+1);
+    unsigned int right_min = min_height(node->right, height+1);
+
+    if (left_min < right_min) {
+        return left_min;
+    } else {
+        return right_min;
+    }
+}
+
+unsigned int max_height(struct Node* node, unsigned int height) {
+    if ((node->left == NULL) && (node->right == NULL)) return height;
+    if (node->left  == NULL) return max_height(node->right, height+1);
+    if (node->right == NULL) return max_height(node->left, height+1);
+
+    unsigned int left_max  = max_height(node->left, height+1);
+    unsigned int right_max = max_height(node->right, height+1);
+
+    if (left_max > right_max) {
+        return left_max;
+    } else {
+        return right_max;
+    }
+}
+
+void verify_tree_height(struct Node* root) {
+    if (root == NULL) return;
+
+    unsigned int min_h = min_height(root, 1);
+    unsigned int max_h = max_height(root, 1);
+
+    if (max_h >= 2*min_h) {
+        printf("llrb-condition violated.\n");
+        printf("\tmin-height %u", min_h);
+        printf("\tmax-height %u", max_h);
+        exit(EXIT_FAILURE);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/llrb/verifier/llrbContextWithVerifier.h	Tue Feb 02 16:12:34 2016 +0900
@@ -0,0 +1,5 @@
+#include "../llrbContext.h"
+
+unsigned int min_height(struct Node* node, unsigned int height);
+unsigned int max_height(struct Node* node, unsigned int height);
+void verify_tree_height(struct Node* root);

--- a/src/llrb/verifier/verify_put_cs.c	Tue Feb 02 16:02:55 2016 +0900
+++ b/src/llrb/verifier/verify_put_cs.c	Tue Feb 02 16:12:34 2016 +0900
@@ -5,9 +5,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <time.h>
-#include "../llrbContext.h"
-
-void verify_tree_height(struct Node*);
+#include "llrbContextWithVerifier.h"
 
 __code meta(struct Context* context, enum Code next) {
     if (next == Put) {
@@ -29,47 +27,3 @@
     free(context->heapStart);
     goto exit(0);
 }
-
-unsigned int min_height(struct Node* node, unsigned int height) {
-    if ((node->left == NULL) && (node->right == NULL)) return height;
-    if (node->left  == NULL) return min_height(node->right, height+1);
-    if (node->right == NULL) return min_height(node->left, height+1);
-
-    unsigned int left_min  = min_height(node->left, height+1);
-    unsigned int right_min = min_height(node->right, height+1);
-
-    if (left_min < right_min) {
-        return left_min;
-    } else {
-        return right_min;
-    }
-}
-
-unsigned int max_height(struct Node* node, unsigned int height) {
-    if ((node->left == NULL) && (node->right == NULL)) return height;
-    if (node->left  == NULL) return max_height(node->right, height+1);
-    if (node->right == NULL) return max_height(node->left, height+1);
-
-    unsigned int left_max  = max_height(node->left, height+1);
-    unsigned int right_max = max_height(node->right, height+1);
-
-    if (left_max > right_max) {
-        return left_max;
-    } else {
-        return right_max;
-    }
-}
-
-void verify_tree_height(struct Node* root) {
-    if (root == NULL) return;
-
-    unsigned int min_h = min_height(root, 1);
-    unsigned int max_h = max_height(root, 1);
-
-    if (max_h >= 2*min_h) {
-        printf("llrb-condition violated.\n");
-        printf("\tmin-height %u", min_h);
-        printf("\tmax-height %u", max_h);
-        exit(EXIT_FAILURE);
-    }
-}