oxiz_sat/parallel/
proof_check.rs

1//! Parallel Proof Checking.
2#![allow(missing_docs, dead_code)] // Under development
3//!
4//! Validates SAT proofs in parallel for faster verification.
5
6#[allow(unused_imports)]
7use crate::prelude::*;
8use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIterator};
9
10/// Configuration for parallel proof checking.
11#[derive(Debug, Clone)]
12pub struct ProofCheckConfig {
13    /// Number of parallel workers
14    pub num_workers: usize,
15    /// Chunk size for parallel processing
16    pub chunk_size: usize,
17    /// Enable detailed error reporting
18    pub detailed_errors: bool,
19}
20
21impl Default for ProofCheckConfig {
22    fn default() -> Self {
23        Self {
24            num_workers: std::thread::available_parallelism()
25                .map(|n| n.get())
26                .unwrap_or(4),
27            chunk_size: 100,
28            detailed_errors: true,
29        }
30    }
31}
32
33/// Result of proof checking.
34#[derive(Debug, Clone)]
35pub enum ProofCheckResult {
36    /// Proof is valid
37    Valid,
38    /// Proof is invalid with error details
39    Invalid { step_id: usize, reason: String },
40    /// Checking incomplete (timeout or resource limit)
41    Incomplete,
42}
43
44/// Parallel proof checker.
45pub struct ParallelProofChecker {
46    config: ProofCheckConfig,
47}
48
49impl ParallelProofChecker {
50    /// Create a new parallel proof checker.
51    pub fn new(config: ProofCheckConfig) -> Self {
52        Self { config }
53    }
54
55    /// Create with default configuration.
56    pub fn default_config() -> Self {
57        Self::new(ProofCheckConfig::default())
58    }
59
60    /// Check a proof in parallel.
61    pub fn check_proof(&self, _proof_steps: &[ProofStep]) -> ProofCheckResult {
62        // Simplified proof checking logic
63        // Real implementation would validate each step in parallel
64
65        // Divide proof into chunks
66        let chunks: Vec<_> = _proof_steps.chunks(self.config.chunk_size).collect();
67
68        // Validate chunks in parallel
69        let results: Vec<_> = chunks
70            .par_iter()
71            .enumerate()
72            .map(|(chunk_idx, chunk)| self.check_chunk(chunk, chunk_idx * self.config.chunk_size))
73            .collect();
74
75        // Aggregate results
76        for result in results {
77            if let ProofCheckResult::Invalid { .. } = result {
78                return result;
79            }
80        }
81
82        ProofCheckResult::Valid
83    }
84
85    /// Check a chunk of proof steps.
86    fn check_chunk(&self, _steps: &[ProofStep], _base_idx: usize) -> ProofCheckResult {
87        // Simplified: would validate each step
88        // Check that each step follows from previous steps
89        ProofCheckResult::Valid
90    }
91
92    /// Verify a single proof step.
93    fn verify_step(&self, _step: &ProofStep, _context: &ProofContext) -> bool {
94        // Simplified: would check step validity
95        true
96    }
97}
98
99/// A proof step (simplified).
100#[derive(Debug, Clone)]
101pub struct ProofStep {
102    pub id: usize,
103    pub rule: ProofRule,
104    pub premises: Vec<usize>,
105}
106
107/// Proof rules (simplified).
108#[derive(Debug, Clone, Copy)]
109pub enum ProofRule {
110    Input,
111    Resolution,
112    Deletion,
113}
114
115/// Proof checking context.
116#[derive(Debug, Clone)]
117struct ProofContext {
118    derived_clauses: FxHashMap<usize, Vec<i32>>,
119}
120
121impl ProofContext {
122    fn new() -> Self {
123        Self {
124            derived_clauses: FxHashMap::default(),
125        }
126    }
127}
128
129#[cfg(test)]
130mod tests {
131    use super::*;
132
133    #[test]
134    fn test_proof_checker_creation() {
135        let checker = ParallelProofChecker::default_config();
136        assert_eq!(checker.config.chunk_size, 100);
137    }
138
139    #[test]
140    fn test_empty_proof() {
141        let checker = ParallelProofChecker::default_config();
142        let result = checker.check_proof(&[]);
143        assert!(matches!(result, ProofCheckResult::Valid));
144    }
145
146    #[test]
147    fn test_proof_check_result() {
148        let valid = ProofCheckResult::Valid;
149        assert!(matches!(valid, ProofCheckResult::Valid));
150
151        let invalid = ProofCheckResult::Invalid {
152            step_id: 42,
153            reason: "test".to_string(),
154        };
155        assert!(matches!(invalid, ProofCheckResult::Invalid { .. }));
156    }
157}
oxiz_sat/parallel/proof_check.rs

oxiz_sat/parallel/
proof_check.rs
