233 lines
6.9 KiB
Rust
233 lines
6.9 KiB
Rust
enum ProofResult
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{
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ProofNotFound,
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Refutation,
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Satisfiable,
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}
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fn reset_proof_results<'a>(project: &'a mut ask_dracula::Project)
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{
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for block in &mut project.blocks
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{
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match block
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{
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ask_dracula::project::Block::Whitespace(_) => (),
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ask_dracula::project::Block::FormulaStatement(ref mut formula_statement) => formula_statement.proven = false,
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}
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}
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}
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fn run_vampire<I, S>(input: &str, arguments: Option<I>)
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-> Result<(ProofResult, Option<f32>), ask_dracula::Error>
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where I: IntoIterator<Item = S>, S: AsRef<std::ffi::OsStr>
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{
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let mut vampire = std::process::Command::new("vampire");
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let vampire = match arguments
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{
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Some(arguments) => vampire.args(arguments),
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None => &mut vampire,
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};
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//eprintln!("{}", input);
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let mut vampire = vampire
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.stdin(std::process::Stdio::piped())
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.stdout(std::process::Stdio::piped())
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.stderr(std::process::Stdio::piped())
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.spawn()
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.map_err(|error| ask_dracula::Error::new_run_vampire(error))?;
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{
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use std::io::Write;
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let vampire_stdin = vampire.stdin.as_mut().unwrap();
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vampire_stdin.write_all(input.as_bytes())
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.map_err(|error| ask_dracula::Error::new_run_vampire(error))?;
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}
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let output = vampire.wait_with_output()
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.map_err(|error| ask_dracula::Error::new_run_vampire(error))?;
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let stdout = std::str::from_utf8(&output.stdout)
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.map_err(|error| ask_dracula::Error::new_run_vampire(error))?;
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let stderr = std::str::from_utf8(&output.stderr)
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.map_err(|error| ask_dracula::Error::new_run_vampire(error))?;
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if !output.status.success()
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{
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let proof_not_found_regex = regex::Regex::new(r"% \(\d+\)Proof not found in time").unwrap();
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if proof_not_found_regex.is_match(stdout)
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{
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return Ok((ProofResult::ProofNotFound, None));
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}
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return Err(ask_dracula::Error::new_run_vampire(
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format!("Vampire returned unsuccessful exit code ({})\n\n======== stdout ========\n{}\n\n======== stderr ========\n{}", output.status, std::str::from_utf8(&output.stdout).unwrap_or("(not valid UTF-8)").trim(), std::str::from_utf8(&output.stderr).unwrap_or("(not valid UTF-8)").trim())));
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}
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let proof_time_regex = regex::Regex::new(r"% \(\d+\)Success in time (\d+(?:\.\d+)?) s").unwrap();
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let proof_time = proof_time_regex.captures(stdout)
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.map(|captures| captures.get(1).unwrap().as_str().parse::<f32>().ok())
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.unwrap_or(None);
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let refutation_regex = regex::Regex::new(r"% \(\d+\)Termination reason: Refutation").unwrap();
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if refutation_regex.is_match(stdout)
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{
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return Ok((ProofResult::Refutation, proof_time));
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}
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Err(ask_dracula::Error::new_interpret_vampire_output(stdout.to_string(), stderr.to_string()))
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}
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fn main() -> Result<(), Box<dyn std::error::Error>>
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{
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let matches = clap::App::new("Ask Dracula: Using Vampire as an interactive theorem prover")
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.arg(clap::Arg::with_name("file").takes_value(true).required(true))
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.arg(clap::Arg::with_name("proof-direction").long("proof-direction").takes_value(true).default_value("forward"))
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.arg(clap::Arg::with_name("vampire_arguments").multiple(true))
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.after_help("example: ask_dracula <project file> -- --mode casc --cores 8")
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.get_matches();
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let file = matches.value_of("file").unwrap().to_string();
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let file_path = std::path::Path::new(&file);
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let file_content = std::fs::read_to_string(&file_path)?;
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let (_, mut project) = ask_dracula::parse::project(&file_content)
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.map_err(|_| "couldn’t parse input file")?;
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let proof_directions = match matches.value_of("proof-direction").unwrap()
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{
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"forward" => vec![ask_dracula::project::ProofDirection::Forward],
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"backward" => vec![ask_dracula::project::ProofDirection::Backward],
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"both" => vec![ask_dracula::project::ProofDirection::Forward, ask_dracula::project::ProofDirection::Backward],
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proof_direction => panic!("unrecognized proof direction “{}”", proof_direction),
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};
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let mut section_separator = "";
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let mut was_proof_attempted = false;
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for proof_direction in proof_directions
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{
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println!("{}performing {} proof", section_separator, proof_direction);
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section_separator = "\n";
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reset_proof_results(&mut project);
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loop
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{
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let conjecture = project.blocks.iter()
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.filter_map
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(
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|block|
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match block
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{
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ask_dracula::project::Block::Whitespace(_) => None,
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ask_dracula::project::Block::FormulaStatement(ref formula_statement) => Some(formula_statement),
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}
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)
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.find(|formula_statement| ask_dracula::format_tptp::is_formula_statement_lemma(&formula_statement, proof_direction));
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let conjecture = match conjecture
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{
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Some(conjecture) => Some(conjecture),
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None => project.blocks.iter()
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.filter_map
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(
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|block|
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match block
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{
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ask_dracula::project::Block::Whitespace(_) => None,
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ask_dracula::project::Block::FormulaStatement(ref formula_statement) => Some(formula_statement),
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}
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)
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.find(|formula_statement| ask_dracula::format_tptp::is_formula_statement_theorem(&formula_statement, proof_direction)),
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};
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let conjecture = match conjecture
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{
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Some(ref conjecture) => conjecture,
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None => break,
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};
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was_proof_attempted = true;
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eprintln!("verifying {}: {}", &conjecture.kind, conjecture.formula);
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let tptp_content = format!("{}", ask_dracula::format_tptp::display_project_with_conjecture_tptp(&project, conjecture, proof_direction));
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let (vampire_result, proof_time)
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= run_vampire(&tptp_content, matches.values_of("vampire_arguments").map(|value| value))?;
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match vampire_result
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{
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ProofResult::ProofNotFound =>
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{
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println!("proof not found");
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return Ok(());
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},
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ProofResult::Refutation =>
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{
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if let Some(proof_time) = proof_time
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{
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println!("{} proven in {} seconds", &conjecture.kind, proof_time);
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}
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else
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{
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println!("assertion proven");
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}
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// TODO: refactor
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let conjecture = project.blocks.iter_mut()
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.filter_map
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(
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|block|
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match block
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{
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ask_dracula::project::Block::Whitespace(_) => None,
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ask_dracula::project::Block::FormulaStatement(ref mut formula_statement) => Some(formula_statement),
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}
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)
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.find(|formula_statement| ask_dracula::format_tptp::is_formula_statement_lemma(&formula_statement, proof_direction));
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let mut conjecture = match conjecture
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{
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Some(conjecture) => Some(conjecture),
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None => project.blocks.iter_mut()
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.filter_map
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(
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|block|
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match block
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{
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ask_dracula::project::Block::Whitespace(_) => None,
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ask_dracula::project::Block::FormulaStatement(ref mut formula_statement) => Some(formula_statement),
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}
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)
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.find(|formula_statement| ask_dracula::format_tptp::is_formula_statement_theorem(&formula_statement, proof_direction)),
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}.unwrap();
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conjecture.proven = true;
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},
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ProofResult::Satisfiable =>
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{
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println!("assertion disproven");
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return Ok(());
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},
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}
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}
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}
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match was_proof_attempted
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{
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true => println!("finished all proofs"),
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false => println!("nothing to verify, exiting"),
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}
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Ok(())
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}
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