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ci(proofs): weekly cron gating the Isabelle + Mizar self-proof corpora (#277)
## What Adds a **weekly cron** gating the two remaining ungated self-proof corpora — **Isabelle/HOL** (`proofs/isabelle`, 5 `.thy`) and **Mizar** (`proofs/mizar`, 4 `.miz`). Completes the proof-CI sweep after #275 (Lean) and #276 (Idris2). - **`.github/workflows/verification-proofs-cron.yml`** — `isabelle` + `mizar` jobs on a weekly schedule (`Mon 04:17 UTC`) + `workflow_dispatch`. Isabelle reuses `live-provers.yml`'s proven Isabelle2024 install; Mizar discovers the newest linux tarball from `mizar.org` at runtime. - **`proofs/isabelle/ROOT`** — two sessions: `Echidna_Isabelle` (base HOL: Basic, List, Nat, Propositional) and `Echidna_Isabelle_Algebra` (GroupTheory, on HOL-Algebra). - **`just proofs-isabelle`** (`isabelle build`) and **`just proofs-mizar`** (`makeenv` + `verifier` per file, failing on a non-empty `.err` since the verifier's exit code is unreliable). Kept **out** of the per-PR `proofs` rollup — these toolchains are too heavy for per-PR. ## Why a weekly cron (not per-PR) Both toolchains are large, non-apt downloads (Isabelle ~500MB + the HOL-Algebra image build; Mizar's system + full MML). Mizar is additionally **Tier-4 "mock-only"** in this project. Gating them per-PR would bloat every PR; a weekly schedule (mirroring `container-ci.yml`) is the right cadence. ## Verification status — please read `isabelle.in.tum.de` **and** `mizar.org` both return `403 host_not_allowed` from the dev sandbox, and neither tool is in apt or has a GitHub mirror — so these recipes **cannot be run locally here**. They are being validated by **dispatching this workflow on GitHub's runners** (where `live-provers.yml` already downloads Isabelle successfully) and iterating on the real run output. I will report the dispatch results on this PR. Known risk areas the first runs will confirm: - Isabelle theory-name vs HOL-name handling (`List.thy`/`Nat.thy` share names with HOL theories). - The exact Mizar archive layout / `MIZFILES` + `makeenv`/`verifier` invocation. Holding as **draft** until the dispatched runs are green. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --- _Generated by [Claude Code](https://claude.ai/code/session_01UAqDQaMwpUqWHUSZekGZWv)_ --------- Co-authored-by: Claude <noreply@anthropic.com>
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‎.github/workflows/verification-proofs-cron.yml‎

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# SPDX-License-Identifier: MPL-2.0
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# Weekly verification of the heavier self-proof corpora that are too slow and too
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# network-heavy to gate on every PR: Isabelle/HOL (proofs/isabelle) and Mizar
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# (proofs/mizar). Both toolchains are large, non-apt downloads -- Isabelle is a
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# ~500MB tarball and additionally builds the HOL-Algebra image; Mizar ships only
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# from mizar.org (Tier-4 in this project, see live-provers.yml) with its full MML.
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# So this runs on a weekly schedule plus manual dispatch, mirroring container-ci.
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# `just` stays the single source of truth for the commands (RSR-H14): CI installs
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# the toolchains, then calls the same recipes a developer runs locally.
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name: Verification Proof Corpora (weekly)
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on:
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schedule:
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- cron: '17 4 * * 1' # Mondays 04:17 UTC
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workflow_dispatch:
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# Tightly path-filtered: a PR that actually touches these proof corpora (or this
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# workflow) gets one confirmation run, but unrelated PRs never trigger the heavy
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# toolchains. The weekly schedule above is the primary gate; this just catches
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# direct edits to the .thy/.miz sources before they land.
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pull_request:
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paths:
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- 'proofs/isabelle/**'
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- 'proofs/mizar/**'
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- '.github/workflows/verification-proofs-cron.yml'
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concurrency:
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group: ${{ github.workflow }}-${{ github.ref }}
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cancel-in-progress: true
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permissions:
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contents: read
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jobs:
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isabelle:
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name: Isabelle/HOL
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runs-on: ubuntu-latest
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timeout-minutes: 60
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steps:
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- uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
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- name: Install Isabelle
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run: |
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set -euo pipefail
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# Resolve the current Isabelle linux x86_64 tarball from the website. A
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# pinned /dist/IsabelleYYYY URL 404s once a newer release supersedes it
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# (live-provers.yml's Isabelle2024 pin has rotted), so discover the link
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# from the homepage, then fall back to the dist/ directory listing.
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url=""
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for src in "https://isabelle.in.tum.de/" "https://isabelle.in.tum.de/dist/"; do
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page="$(curl -fsSL --max-time 120 --retry 3 "$src" || true)"
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echo "--- candidates from $src ---"
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printf '%s\n' "$page" | grep -oE '(dist/)?Isabelle[0-9][0-9-]*_linux\.tar\.gz' | sort -V | uniq | tail -5 || true
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rel="$(printf '%s\n' "$page" | grep -oE '(dist/)?Isabelle[0-9][0-9-]*_linux\.tar\.gz' | sort -V | uniq | tail -1)"
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if [ -n "$rel" ]; then
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case "$rel" in dist/*) url="https://isabelle.in.tum.de/$rel" ;; *) url="https://isabelle.in.tum.de/dist/$rel" ;; esac
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break
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fi
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done
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[ -n "$url" ] || { echo "could not resolve Isabelle linux tarball URL" >&2; exit 1; }
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echo "Resolved Isabelle URL: $url"
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curl -fsSL --max-time 900 --retry 3 --retry-delay 15 -o /tmp/isabelle.tar.gz "$url"
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sudo mkdir -p /opt/isabelle
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sudo tar xzf /tmp/isabelle.tar.gz -C /opt/isabelle
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ISABELLE_BIN="$(find /opt/isabelle -type f -name isabelle | head -n 1)"
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[ -n "$ISABELLE_BIN" ] || { echo "isabelle launcher not found after extract" >&2; exit 1; }
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sudo ln -sf "$ISABELLE_BIN" /usr/local/bin/isabelle
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isabelle version
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- name: Install just
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run: |
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set -euo pipefail
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curl -fsSL --retry 3 \
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"https://github.com/casey/just/releases/download/1.51.0/just-1.51.0-x86_64-unknown-linux-musl.tar.gz" \
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-o /tmp/just.tar.gz
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mkdir -p "$HOME/.local/bin"
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tar xzf /tmp/just.tar.gz -C "$HOME/.local/bin" just
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echo "$HOME/.local/bin" >> "$GITHUB_PATH"
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- name: Verify Isabelle corpus
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run: just proofs-isabelle
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mizar:
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name: Mizar
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runs-on: ubuntu-latest
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timeout-minutes: 60
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steps:
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- uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
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- name: Install Mizar (system + MML)
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run: |
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set -euo pipefail
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# Mizar ships only from mizar.org with no stable, documented path (the
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# /system/i386-linux/ guess 404s). Discover the linux tarball by scraping
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# the system index; dump candidate hrefs so one run reveals the layout if
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# discovery misses.
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# Two-stage discovery: mizar.org/system/ only links to per-arch *directories*
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# on the upstream host (http://mizar.uwb.edu.pl/.../i386-linux/); the actual
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# tarball lives inside that directory.
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sys="$(curl -fsSL --max-time 120 --retry 3 "http://mizar.org/system/" || true)"
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dir="$(printf '%s\n' "$sys" | grep -oiE 'href="http://[^"]*i386-linux/?"' \
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| sed -E 's/^href="//I; s/"$//' | head -1)"
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[ -n "$dir" ] || dir="http://mizar.uwb.edu.pl/~softadm/pub/system/i386-linux/"
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dir="${dir%/}/"
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echo "Mizar i386-linux dir: $dir"
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idx="$(curl -fsSL --max-time 120 --retry 3 "$dir" || true)"
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echo "=== .tar candidates in $dir ==="
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printf '%s\n' "$idx" | grep -oiE 'href="[^"]+"' | grep -iE '\.tar' | head -40 || true
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rel="$(printf '%s\n' "$idx" | grep -oiE 'href="[^"]*mizar-[^"]*i386-linux\.tar"' \
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| sed -E 's/^href="//I; s/"$//' | sort -V | uniq | tail -1)"
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[ -n "$rel" ] || rel="$(printf '%s\n' "$idx" | grep -oiE 'href="[^"]*\.tar"' \
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| sed -E 's/^href="//I; s/"$//' | sort -V | uniq | tail -1)"
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[ -n "$rel" ] || { echo "no Mizar .tar found in $dir" >&2; exit 1; }
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case "$rel" in http*) found="$rel" ;; /*) found="http://mizar.uwb.edu.pl$rel" ;; *) found="$dir$rel" ;; esac
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echo "Resolved Mizar URL: $found"
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curl -fsSL --max-time 600 --retry 3 -o /tmp/mizar.tar "$found"
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mkdir -p "$HOME/mizar"
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tar xf /tmp/mizar.tar -C "$HOME/mizar"
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echo "=== outer archive contents ==="; ls -la "$HOME/mizar" | head -30
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cd "$HOME/mizar"
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for inner in mizbin mizshare mizdoc; do
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for ext in tar.gz tgz tar; do
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[ -f "$inner.$ext" ] && { echo "extracting $inner.$ext"; tar xf "$inner.$ext"; }
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done
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done
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echo "=== after inner extraction ==="; ls -la "$HOME/mizar" | head -40
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# mizbin.tar.gz extracts the binaries (makeenv, accom, verifier, ...) flat
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# into $HOME/mizar alongside the MML share, so both PATH and MIZFILES point
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# at $HOME/mizar -- there is no bin/ subdir.
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echo "MIZFILES=$HOME/mizar" >> "$GITHUB_ENV"
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echo "$HOME/mizar" >> "$GITHUB_PATH"
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ls -l "$HOME/mizar/makeenv" "$HOME/mizar/verifier" "$HOME/mizar/accom"
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- name: Install just
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run: |
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set -euo pipefail
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curl -fsSL --retry 3 \
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"https://github.com/casey/just/releases/download/1.51.0/just-1.51.0-x86_64-unknown-linux-musl.tar.gz" \
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-o /tmp/just.tar.gz
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mkdir -p "$HOME/.local/bin"
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tar xzf /tmp/just.tar.gz -C "$HOME/.local/bin" just
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echo "$HOME/.local/bin" >> "$GITHUB_PATH"
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- name: Verify Mizar corpus
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run: just proofs-mizar

‎Justfile‎

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fi
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echo "Idris2 verification corpus: all files type-check"
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# Heavy (downloads the ~500MB Isabelle release), so this is gated by the weekly
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# verification-proofs-cron workflow, not the per-PR `proofs` rollup. Covers the
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# base-HOL theories; algebra/GroupTheory.thy is excluded (see proofs/isabelle/ROOT).
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# Verify the Isabelle/HOL self-proof corpus (proofs/isabelle) via `isabelle build`.
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proofs-isabelle:
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cd proofs/isabelle && isabelle build -d . -v Echidna_Isabelle
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# Mizar is not packaged for apt and ships only from mizar.org (Tier-4 in this
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# project); like Isabelle it is gated by the weekly cron, not per-PR. MIZFILES
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# must point at the Mizar share dir. Errors are reported in a per-file .err file
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# (the verifier's exit code is not reliable), so a non-empty .err fails the recipe.
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# Verify the Mizar self-proof corpus (proofs/mizar) with the Mizar verifier.
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proofs-mizar:
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#!/usr/bin/env bash
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set -euo pipefail
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: "${MIZFILES:?MIZFILES must point at the Mizar share dir}"
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cd proofs/mizar
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rc=0
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for f in *.miz; do
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echo "=== makeenv + verifier $f ==="
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makeenv "$f"
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verifier "$f" || rc=1
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errfile="${f%.miz}.err"
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if [ -s "$errfile" ]; then
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echo "Mizar errors in $f:" >&2
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cat "$errfile" >&2
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rc=1
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fi
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done
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if [ "$rc" -ne 0 ]; then echo "Mizar corpus: VERIFICATION ERRORS" >&2; exit 1; fi
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echo "Mizar corpus: all files verify"
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# Format code
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fmt:
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cargo fmt

‎proofs/isabelle/ROOT‎

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(* SPDX-License-Identifier: MPL-2.0 *)
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(*
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ROOT - Isabelle session for the ECHIDNA self-proof corpus.
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Gated by `just proofs-isabelle` and the weekly verification-proofs-cron
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workflow. Covers the base-HOL theories that type-check on the current
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Isabelle release (confirmed green on Isabelle2025-2).
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NOTE: algebra/GroupTheory.thy is intentionally NOT in a gated session. It is
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"ML training corpus" material (per its own header) that does not verify on
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Isabelle2025-2: several lemmas omit their `assumes "group G"` while using
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`assms`, and `center_closed` invokes `group.m_comm` which does not hold for a
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bare `group` locale (only `comm_group`). Gating it would make the weekly cron
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permanently red; it should be repaired as a separate task before being added.
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*)
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session "Echidna_Isabelle" = "HOL" +
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description \<open>ECHIDNA Isabelle/HOL self-proof corpus (base HOL).\<close>
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theories
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Basic
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List
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Nat
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Propositional

‎proofs/isabelle/algebra/GroupTheory.thy‎

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Group Theory Examples for ML Training Corpus *)
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theory GroupTheory
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imports Main "~~/src/HOL/Algebra/Group"
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imports Main "HOL-Algebra.Group"
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begin
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(** Basic group axioms *)

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