diff --git a/src/fiat_shamir.rs b/src/fiat_shamir.rs
index 4a6f887..3d6809a 100644
--- a/src/fiat_shamir.rs
+++ b/src/fiat_shamir.rs
@@ -183,10 +183,6 @@ pub fn compute_fiat_shamir_hints(
     let column_log_sizes = components.components().column_log_sizes();
     commitment_scheme.commit(proof.commitments[0], &column_log_sizes[0], channel);
 
-    if column_log_sizes.len() == 2 {
-        commitment_scheme.commit(proof.commitments[1], &column_log_sizes[1], channel);
-    }
-
     channel.mix_felts(
         &proof
             .lookup_values
diff --git a/src/split/mod.rs b/src/split/mod.rs
index 834d313..354f617 100644
--- a/src/split/mod.rs
+++ b/src/split/mod.rs
@@ -348,12 +348,16 @@ impl CovenantProgram for FibonacciSplitProgram {
                 { FibonacciFiatShamirGadget::run(&channel) }
             };
 
-            let final_stack = get_final_stack(
-                script,
-                convert_to_witness(script! {
+            let witness = convert_to_witness(script! {
                     { *fiat_shamir_hints.clone() }
                 })
-                .unwrap(),
+                .unwrap();
+
+            println!("fiat-shamir witness size: {}", witness.len());
+
+            let final_stack = get_final_stack(
+                script,
+                witness,
             );
 
             let stack_hash = StackHash::compute(&final_stack);
@@ -382,6 +386,8 @@ impl CovenantProgram for FibonacciSplitProgram {
             .unwrap();
             witness.extend_from_slice(stack);
 
+            println!("prepare witness size: {}", witness.len());
+
             let final_stack = get_final_stack(script, witness);
 
             let stack_hash = StackHash::compute(&final_stack);
@@ -396,6 +402,7 @@ impl CovenantProgram for FibonacciSplitProgram {
             assert!(matches!(input, Self::Input::PerQuery(_, _, _)));
 
             if id <= 8 {
+                println!("step witness size: {}", old_state.stack.len());
                 Ok(Self::State {
                     pc: id + 1,
                     stack_hash: old_state.stack_hash.clone(),