B

cargo_klee_examples/examples/array.rs

@@ -11,7 +11,11 @@ use panic_klee as _;
 fn sum_first_elements(arr: &[u8], index: usize) -> u8 {
     let mut acc = 0;
     for i in 0..index {
-        acc += arr[i as usize];
+        if index < arr.len() {
+            acc += arr[i as usize];
+        } else {
+            break;
+        }
     }
     acc
 }
@@ -37,7 +41,22 @@ fn main() {
 // Try to explain in your own words the difference and why?
 // (Hint, even if we don't use the result `b`, Rust do not optimize out the call, why?)
 //
-// [your answer here]
+// [your answer here]]
+// The diffrence is that debug test all 10 possible paths and release only checks 2. This is becaus
+// 9 of the paths are basicly the same. These are the path were index is 0..8, the last path is
+// diffrent because then the index is out side of the array(index = 255), thus there will be an error.
+//
+//
+// Debug:
+// KLEE: done: total instructions = 4686
+// KLEE: done: completed paths = 10
+// KLEE: done: generated tests = 10
+//
+// Release:
+// KLEE: done: total instructions = 32
+// KLEE: done: completed paths = 2
+// KLEE: done: generated tests = 2
+//
 //
 // B) Fix the code so that you don't get an error.
 // (It should still compute the sum of the n first elements

cargo_klee_examples/examples/get_sign.rs

@@ -85,7 +85,8 @@ fn main() {
 //
 // [your answer here]
 // There are a lot of flags in the command which makes it a bit long to write. Maybe add a new
-// command for emitting llvm-ir files or maybe combine some of the flags into one.
+// command for emitting llvm-ir files or maybe add a combinedflag that combines some of the flags
+// into one.
 //
 // C) Inner workings.
 //