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The Lean Theorem Proving Environment

Setup instructions

Make sure to install elan: https://www.github.com/kha/elan

Set up lean-tpe repository

git clone [email protected]:jesse-michael-han/lean-tpe-public $LEAN_TPE_DIR

cd $LEAN_TPE_DIR

leanpkg configure

leanproject get-mathlib-cache

bash ./_target/deps/mathlib/scripts/mk_all.sh # make a file that imports all of mathlib

leanpkg build

Evaluation instructions

The Lean scripts will dump JSON messages to a specified file, with a new message on each line. Each message encodes the history of a single proof search.

Run some toy examples

WARNING: The error messages of the Lean scripts are currently extremely unhelpful. Make sure arguments are passed in correct order.

Check that single-threaded baseline evaluation works

# greedy strategy

lean --run ./src/evaluation/greedy/baseline.lean ./test/dummy_decls2.names ./test/dummy_out_greedy_baseline.log 50 5 300 > ./test/dummy_out_greedy_baseline.out 2>&1

# this should be 31
cat ./test/dummy_out_greedy_baseline.log | grep | wc -l

# this should be 0 (TODO(jesse): allow optional environment-setting)
cat ./test/dummy_out_greedy_baseline.log | grep '"success":true' | wc -l

# bfs strategy

lean --run ./src/evaluation/bfs/baseline.lean ./test/dummy_decls2.names ./test/dummy_out_bfs_baseline.log 50 25 50 5 300 > ./test/dummy_out_bfs_baseline.out 2>&1

# this should be 31
cat ./test/dummy_out_bfs_baseline.log | grep | wc -l

# this should be 0 (TODO(jesse): allow optional environment-setting)
cat ./test/dummy_out_bfs_baseline.log | grep '"success":true' | wc -l

Check that single-threaded GPT-f evaluation works

# greedy strategy

# args: decl_names logfile max_tokens temp top_p n best_of fuel engine_id api_key
lean --run ./src/evaluation/greedy/gptf.lean ./test/dummy_decls2.names ./test/dummy_out_greedy_gptf.log 256 0.7 1.0 10 10 50 formal-lean-wm-to-tt-m1-m2-v4-c4 $OPENAI_API_KEY 5 300 > ./test/dummy_out_greedy_gptf.out 2>&1

# should be 31
cat ./test/dummy_out_greedy_gptf.log | grep | wc -l

# should be ~20
cat ./test/dummy_out_greedy_gptf.log | grep '"success":true' | wc -l

# bfs strategy

# args: decl_names logfile max_tokens temp top_p n best_of fuel max_width max_depth engine_id api_key
lean --run ./src/evaluation/bfs/gptf.lean ./test/dummy_decls2.names ./test/dummy_out_bfs_gptf.log 256 0.7 1.0 10 10 50 10 25 formal-lean-wm-to-tt-m1-m2-v4-c4 $OPENAI_API_KEY 5 300 > ./test/dummy_out_bfs_gptf.out 2>&1

# should be 31
cat ./test/dummy_out_bfs_gptf.log | grep | wc -l

# should be ~24
cat ./test/dummy_out_bfs_gptf.log | grep '"success":true' | wc -l

Check that the Python script wrapper works

The Python script wraps the Lean scripts and runs them in parallel, sharding a list of theorems.

usage: parallel_eval.py [-h] [--max_tokens MAX_TOKENS]
                        [--temperature TEMPERATURE] [--top_p TOP_P] [--n N]
                        [--best_of BEST_OF] [--fuel FUEL]
                        [--engine_id ENGINE_ID] [--api_key API_KEY]
                        [--nbest NBEST] [--beam BEAM]
                        [--model_path MODEL_PATH] [--data_path DATA_PATH]
                        [--entry_pt ENTRY_PT] [--max_width MAX_WIDTH]
                        [--max_depth MAX_DEPTH] [--lean_threads LEAN_THREADS]
                        [--lean_timeout LEAN_TIMEOUT] [--api API]
                        [--search_strategy SEARCH_STRATEGY]
                        [--tac_timeout TAC_TIMEOUT]
                        [--global_timeout GLOBAL_TIMEOUT]
                        n_workers decls_per_shard decls_file dest_dir

positional arguments:
  n_workers
  decls_per_shard
  decls_file
  dest_dir

optional arguments:
  -h, --help            show this help message and exit
  --max_tokens MAX_TOKENS
  --temperature TEMPERATURE
  --top_p TOP_P
  --n N
  --best_of BEST_OF
  --fuel FUEL
  --engine_id ENGINE_ID
  --api_key API_KEY
  --nbest NBEST
  --beam BEAM
  --model_path MODEL_PATH
  --data_path DATA_PATH
  --entry_pt ENTRY_PT
  --max_width MAX_WIDTH
                        maximum size of search queue for BFS
  --max_depth MAX_DEPTH
                        maximum distance of search node from root before the
                        search queue rejects it
  --lean_threads LEAN_THREADS
                        number of threads per Lean process
  --lean_timeout LEAN_TIMEOUT
                        deterministic timeout for Lean process in millions of
                        allocations. Interactive default is one. Default is
                        unbounded (none).
  --api API             gptf|baseline|fairseq
  --search_strategy SEARCH_STRATEGY
                        greedy|bfs
  --tac_timeout TAC_TIMEOUT
                        tactic execution timeout (s)
  --global_timeout GLOBAL_TIMEOUT
                        proof search timeout (s)

Check that the baseline version works. Inspect some of the output files.

python ./scripts/parallel_eval.py 4 8 ./test/dummy_decls2.names ./test_parallel/baseline/ --fuel 50 --api baseline --search_strategy greedy --tac_timeout 5 --global_timeout 300

Check that the greedy GPT-f version works. Inspect some of the output files.

python ./scripts/parallel_eval.py 4 8 ./test/dummy_decls2.names ./test_parallel/gptf_greedy/ --max_tokens 256 --temperature 0.7 --top_p 1.0 --n 10 --best_of 10 --fuel 50 --engine_id formal-lean-wm-to-tt-m1-m2-v4-c4 --api_key $OPENAI_API_KEY --api gptf --search_strategy greedy --tac_timeout 5 --global_timeout 300

Check that the BFS GPT-f version works. Inspect some of the output files.

python ./scripts/parallel_eval.py 4 8 ./test/dummy_decls2.names ./test_parallel/gptf_bfs/ --max_tokens 256 --temperature 0.7 --top_p 1.0 --n 10 --best_of 10 --fuel 50 --max_width 10 --max_depth 50 --engine_id formal-lean-wm-to-tt-m1-m2-v4-c4 --api_key $OPENAI_API_KEY --api gptf --search_strategy bfs --tac_timeout 5 --global_timeout 300

Data processing

Removing non-theorems

lean --run ./src/tools/filter_defs.lean $ORIGINAL_NAMES_FILE $NEW_NAMES_FILE

Shuffling names files

python ./scripts/shuffle_lines.py $NAMES_FILE $SHUFFLED_NAMES_FILE # optional seed -- seed 12387

Guidelines for contributing

Ensure that the following invariants hold before making a PR or pushing to master:

  • leanpkg build does not raise any errors.
  • single-threaded evaluation does not fail (check the logs)
  • your API key is not in the source code

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