diff --git a/.gitignore b/.gitignore
index 97bd7280..374d1bf6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,7 +28,10 @@ execution-reports/
 **/rollup-config.json
 
 # DB
-db/*
+db
+
+# Stdins
+stdins
 
 **/bin/op-proposer
 
diff --git a/Cargo.lock b/Cargo.lock
index 7dc03c6f..9fa744db 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4288,6 +4288,7 @@ dependencies = [
  "futures",
  "kona-host",
  "kona-primitives",
+ "log",
  "num-format",
  "op-alloy-genesis",
  "op-alloy-rpc-types",
diff --git a/elf/riscv32im-succinct-zkvm-elf b/elf/riscv32im-succinct-zkvm-elf
deleted file mode 100755
index c8a8d373..00000000
Binary files a/elf/riscv32im-succinct-zkvm-elf and /dev/null differ
diff --git a/utils/host/Cargo.toml b/utils/host/Cargo.toml
index 22e9a9c5..8632e113 100644
--- a/utils/host/Cargo.toml
+++ b/utils/host/Cargo.toml
@@ -22,6 +22,7 @@ futures.workspace = true
 num-format.workspace = true
 serde.workspace = true
 reqwest.workspace = true
+log.workspace = true
 
 # sp1
 sp1-sdk.workspace = true
diff --git a/utils/host/src/witnessgen.rs b/utils/host/src/witnessgen.rs
index 726f331d..71e64adc 100644
--- a/utils/host/src/witnessgen.rs
+++ b/utils/host/src/witnessgen.rs
@@ -53,6 +53,7 @@ pub const WITNESSGEN_TIMEOUT: Duration = Duration::from_secs(1200);
 struct WitnessGenProcess {
     child: tokio::process::Child,
     exec: String,
+    host_cli: HostCli,
 }
 
 /// Stateful executor for witness generation. Useful for executing several witness generation
@@ -95,6 +96,7 @@ impl WitnessGenExecutor {
         self.ongoing_processes.push(WitnessGenProcess {
             child,
             exec: host_cli.exec.clone().unwrap(),
+            host_cli: host_cli.clone(),
         });
         Ok(())
     }
@@ -135,16 +137,16 @@ impl WitnessGenExecutor {
                 result = child.child.wait() => {
                     match result {
                         Ok(status) if !status.success() => {
-                            return Err(anyhow::anyhow!("Witness generation process exited because it failed."));
+                            return Err(anyhow::anyhow!("Witness generation process for end block {} failed.", child.host_cli.l2_block_number));
                         }
                         Err(e) => {
-                            return Err(anyhow::anyhow!("Failed to get witness generation process status: {}", e));
+                            return Err(anyhow::anyhow!("Failed to get witness generation process status for end block {}: {}", child.host_cli.l2_block_number, e));
                         }
                         _ => {}
                     }
                 }
                 _ = tokio::time::sleep(self.timeout) => {
-                    return Err(anyhow::anyhow!("Witness generation process timed out."));
+                    return Err(anyhow::anyhow!("Witness generation process for end block {} timed out.", child.host_cli.l2_block_number));
                 }
             }
         }