diff --git a/marzipan/TODO.md b/marzipan/TODO.md
index 6623cf0..8a53e92 100644
--- a/marzipan/TODO.md
+++ b/marzipan/TODO.md
@@ -2,4 +2,13 @@
 
 ## Next steps
 
-* figure out why ProVerif is started on the non-processed mpv file
+* ~~figure out why ProVerif is started on the non-processed mpv file~~
+* ~~rework rebound warnings (`clean_warnings` Bash function)~~
+  ```bash
+  rosenpass$ rosenpass-marzipan run-proverif target/proverif/03_identity_hiding_responder.entry.o.pv target/proverif/03_identity_hiding_responder.entry.log
+  ```
+
+* provide log parameter to `rosenpass-marzipan`-call
+* cpp pre-processing stuff
+* awk pre-processing stuff
+* `pretty_output` Bash function
diff --git a/marzipan/src/__init__.py b/marzipan/src/__init__.py
index 6644bfa..ee0f700 100644
--- a/marzipan/src/__init__.py
+++ b/marzipan/src/__init__.py
@@ -5,9 +5,11 @@ import click
 (__all__, export) = setup_exports()
 export(setup_exports)
 
+
 def eprint(*args, **kwargs):
     print(*args, **{"file": pkgs.sys.stderr, **kwargs})
 
+
 def exc(argv, **kwargs):
     eprint("$", *argv)
     command = pkgs.subprocess.run(argv, **kwargs)
@@ -15,6 +17,7 @@ def exc(argv, **kwargs):
         return command.stdout.decode("utf-8")
     return ""
 
+
 @click.command()
 @click.argument("file")
 @click.argument("log")
@@ -28,10 +31,6 @@ def run_proverif(file, log, extra_args=[]):
     return exc(params, stderr=pkgs.sys.stderr)
 
 
-def clean_warnings():
-    pass
-
-
 @click.command()
 @click.argument("prefix")
 @click.argument("mark")
@@ -42,6 +41,7 @@ def pretty_output_line(prefix, mark, color, text):
     colored_mark_text = f"[{color}]{mark} {text}[/{color}]"
     print(colored_prefix, colored_mark_text)
 
+
 @click.command()
 @click.argument("path")
 def analyze(path):
@@ -50,12 +50,30 @@ def analyze(path):
         path
     ])
 
+
 @click.command()
 def clean():
     click.echo("foo")
     pass
 
 
+@click.command()
+def clean_warnings():
+    null = "0455290a-50d5-4f28-8008-3d69605c2835"
+    p = null
+    for line in pkgs.sys.stdin:
+        line = line.rstrip()
+        if not pkgs.re.match(r"^Warning: identifier \w+ rebound.$", line):
+            if p != null:
+                print(p)
+            p = line
+        else:
+            p = null
+    # print last line after EOF
+    if p != null:
+        print(p)
+
+
 @export
 @rename("main") # Click seems to erase __name__
 @click.group()
@@ -63,7 +81,9 @@ def main():
     #pkgs.IPython.embed()
     pass
 
+
 main.add_command(analyze)
 main.add_command(clean)
 main.add_command(run_proverif)
 main.add_command(pretty_output_line)
+main.add_command(clean_warnings)
diff --git a/marzipan/src/analyze.sh b/marzipan/src/analyze.sh
index cef01c7..5880b00 100755
--- a/marzipan/src/analyze.sh
+++ b/marzipan/src/analyze.sh
@@ -6,14 +6,16 @@ exc() {
 }
 
 run_proverif() {
-  #local file; file="$1"; shift
-  #local log; log="$1"; shift
+  local file; file="$1"; shift
+  local log; log="$1"; shift
   #exc proverif -test "${@}" "${file}" 2>&1
 
-  exc rosenpass-marzipan run-proverif "${file}" "${@}"
+  exc rosenpass-marzipan run-proverif "${file}" "${log}" "${@}"
 }
 
 clean_warnings() {
+    exc rosenpass-marzipan clean-warnings
+: <<'END_COMMENT'
    awk '
       BEGIN {
         null = "0455290a-50d5-4f28-8008-3d69605c2835"
@@ -36,6 +38,7 @@ clean_warnings() {
       { bod(); }
       END { $0=null; bod(); }
     '
+END_COMMENT
 }
 
 color_red='\033[0;31m'
@@ -97,6 +100,9 @@ metaverif() {
   local name; name="$(echo "${file}" | grep -Po '[^/]*(?=\.mpv)')"
 
   local cpp_prep; cpp_prep="${tmpdir}/${name}.i.pv"
+
+  echo "internal metaverif"
+
   exc cpp -P -I"${PWD}/$(dirname "${file}")" "${file}" -o "${cpp_prep}"
 
   local awk_prep; awk_prep="${tmpdir}/${name}.o.pv"
@@ -135,6 +141,7 @@ analyze() {
   local entry
   local procs; procs=()
   for entry in "${entries[@]}"; do
+    echo "call metaverif"
     exc metaverif "${entry}" "$@" >&2 & procs+=("$!")
   done
 
@@ -158,6 +165,8 @@ main() {
   cd -- "${dir}"
   tmpdir="target/proverif"
 
+  echo "call main"
+
   case "${cmd}" in
     analyze) analyze ;;
     clean_warnings) clean_warnings ;;