diff --git a/examples/ex_4.c b/examples/ex_4.c
index 99b40fc..a9135f7 100644
--- a/examples/ex_4.c
+++ b/examples/ex_4.c
@@ -126,16 +126,16 @@ main(void)
   for (i = 2049; i < 2057; i++) {
     bool set = sparsemap_is_set(map, i);
     if (set) {
-      __diag("verified %d was set, %s\n", i);
+      __diag("verified %d was set\n", i);
     } else {
-      __diag("darn, %d was not really set, %s\n", i);
+      __diag("darn, %d was not really set\n", i);
     }
   }
   __diag("and %d was %s", i, sparsemap_is_set(map, i + 1) ? "set" : "not set");
   rank = sparsemap_rank(map, 2048, 2060);
   __diag("rank was %lu at offset 109\n", rank);
-  rank = sparsemap_span(map, 2048, 8);
-  __diag("span was found at %lu\n", rank);
+  //rank = sparsemap_span(map, 2048, 8);
+  //__diag("span was found at %lu\n", rank);
   sparsemap_clear(map);
 
   // seed the PRNG
@@ -146,7 +146,7 @@ main(void)
 #endif
 
   for (i = 0; i < TEST_ARRAY_SIZE; i++) {
-    array[i] = (int)__random(&prng) % 7000 + 1;
+    array[i] = (int)__random(&prng) % TEST_ARRAY_SIZE + 1;
     if (array[i] < 0) {
       i--;
     }
@@ -161,15 +161,16 @@ main(void)
     assert(sparsemap_is_set(map, array[i]) == true);
   }
 
-  size_t l = sparsemap_span(map, 0, 8);
-  __diag("found span of 8 at %lu starting from 0\n", l);
-  for (i = (int)l; i < l + 8; i++) {
-    bool set = sparsemap_is_set(map, l + i);
+  size_t len  = 6;
+  size_t l = sparsemap_span(map, 0, len);
+  __diag("found span of %d at %lu starting from 0\n", len, l);
+  for (i = (int)l; i < l + len; i++) {
+    bool set = sparsemap_is_set(map, i);
     if (set) {
-      __diag("verified %lu was set\n", l + i);
+      __diag("verified %lu was set\n", i);
     } else {
-      __diag("darn, %lu was not really set, %s\n", l + i,
-        was_set(l + i, array) ? "but we thought it was" : "because it wasn't");
+      __diag("darn, %lu was not really set, %s\n", i,
+        was_set(i, array) ? "but we thought it was" : "because it wasn't");
     }
   }