diff --git a/fuzzers/FRET/src/systemstate/observers.rs b/fuzzers/FRET/src/systemstate/observers.rs
index a285f11596..d83d947f50 100644
--- a/fuzzers/FRET/src/systemstate/observers.rs
+++ b/fuzzers/FRET/src/systemstate/observers.rs
@@ -256,32 +256,32 @@ fn add_abb_info(trace: &mut Vec<ExecInterval>, table: &HashMap<u64, ReducedFreeR
         match (&trace[i].start_capture.0, &trace[i].end_capture.0) {
             // case with abb to block correspondence
             // APP ABB
-            (CaptureEvent::APIEnd , CaptureEvent::APIStart ) => {assert_eq!(trace[i].level,0); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
-            (CaptureEvent::APIEnd , CaptureEvent::End ) => {assert_eq!(trace[i].level,0); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
-            // API ABB
-            (CaptureEvent::APIStart, CaptureEvent::APIEnd ) => {assert_eq!(trace[i].level,1); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
-            (CaptureEvent::APIStart , CaptureEvent::End ) => {assert_eq!(trace[i].level,1); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
-            // ISR ABB
-            (CaptureEvent::ISRStart, CaptureEvent::ISREnd ) => {/*assert_eq!(open_abb, None);*/ wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
-            (CaptureEvent::ISRStart , CaptureEvent::End ) => {assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
+            // (CaptureEvent::APIEnd , CaptureEvent::APIStart ) => {assert_eq!(trace[i].level,0); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
+            // (CaptureEvent::APIEnd , CaptureEvent::End ) => {assert_eq!(trace[i].level,0); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
+            // // API ABB
+            // (CaptureEvent::APIStart, CaptureEvent::APIEnd ) => {assert_eq!(trace[i].level,1); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
+            // (CaptureEvent::APIStart , CaptureEvent::End ) => {assert_eq!(trace[i].level,1); assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
+            // // ISR ABB
+            // (CaptureEvent::ISRStart, CaptureEvent::ISREnd ) => {/*assert_eq!(open_abb, None);*/ wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
+            // (CaptureEvent::ISRStart , CaptureEvent::End ) => {assert_eq!(open_abb, None); wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::from([edges[i].1.unwrap()]), level: if trace[i].level<2 {trace[i].level} else {2}})))},
             //
             (_, _) => {
                 match trace[i].start_capture.0 {
                     // generic api abb start
                     CaptureEvent::APIStart => {
-                        assert_eq!(open_abb, None);
+                        // assert_eq!(open_abb, None);
                         open_abb_at_this_task_or_level.insert((trace[i].level, if trace[i].level<2 {&curr_name} else {""}), i);
                         wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::new(), level: if trace[i].level<2 {trace[i].level} else {2}})));
                     },
                     // generic isr abb start
                     CaptureEvent::ISRStart => {
-                        assert_eq!(open_abb, None);
+                        // assert_eq!(open_abb, None);
                         open_abb_at_this_task_or_level.insert( (trace[i].level, if trace[i].level<2 {&curr_name} else {trace[i].start_capture.1.as_str()}) , i);
                         wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::new(), level: if trace[i].level<2 {trace[i].level} else {2}})));
                     },
                     // generic app abb start
                     CaptureEvent::APIEnd => {
-                        assert_eq!(open_abb, None);
+                        // assert_eq!(open_abb, None);
                         open_abb_at_this_task_or_level.insert( (trace[i].level, if trace[i].level<2 {&curr_name} else {trace[i].start_capture.1.as_str()}) , i);
                         wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: edges[i].0.unwrap(), ends: HashSet::new(), level: if trace[i].level<2 {trace[i].level} else {2}})));
                     },
@@ -289,7 +289,7 @@ fn add_abb_info(trace: &mut Vec<ExecInterval>, table: &HashMap<u64, ReducedFreeR
                     CaptureEvent::ISREnd => {
                         // special case app abb start
                         if trace[i].start_capture.1=="xPortPendSVHandler" && !task_has_started.contains(curr_name) {
-                            assert_eq!(open_abb, None);
+                            // assert_eq!(open_abb, None);
                             wip_abb_trace.push(Rc::new(RefCell::new(AtomicBasicBlock{start: 0, ends: HashSet::new(), level: if trace[i].level<2 {trace[i].level} else {2}})));
                             open_abb_at_this_task_or_level.insert( (trace[i].level, if trace[i].level<2 {&curr_name} else {trace[i].start_capture.1.as_str()}) , i);
                             task_has_started.insert(curr_name.clone());