1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
use partial_ref::{partial, PartialRef};
use failure::Error;
use varisat_formula::{Lit, Var};
use crate::context::{parts::*, Context};
use crate::transcript::{self, ProofTranscriptProcessor};
use crate::variables::SamplingMode;
use crate::CheckerError;
#[derive(Debug)]
pub enum CheckedProofStep<'a> {
UserVar {
var: Var,
user_var: Option<CheckedUserVar>,
},
AddClause { id: u64, clause: &'a [Lit] },
DuplicatedClause {
id: u64,
same_as_id: u64,
clause: &'a [Lit],
},
TautologicalClause { id: u64, clause: &'a [Lit] },
AtClause {
id: u64,
redundant: bool,
clause: &'a [Lit],
propagations: &'a [u64],
},
DeleteClause { id: u64, clause: &'a [Lit] },
DeleteAtClause {
id: u64,
keep_as_redundant: bool,
clause: &'a [Lit],
propagations: &'a [u64],
},
DeleteRatClause {
id: u64,
keep_as_redundant: bool,
clause: &'a [Lit],
pivot: Lit,
propagations: &'a ResolutionPropagations,
},
MakeIrredundant { id: u64, clause: &'a [Lit] },
Model { assignment: &'a [Lit] },
Assumptions { assumptions: &'a [Lit] },
FailedAssumptions {
failed_core: &'a [Lit],
propagations: &'a [u64],
},
}
#[derive(Debug)]
pub enum CheckedSamplingMode {
Sample,
Witness,
}
#[derive(Debug)]
pub struct CheckedUserVar {
pub user_var: Var,
pub sampling_mode: CheckedSamplingMode,
pub new_var: bool,
}
#[derive(Debug)]
pub struct ResolutionPropagations {
}
#[derive(Copy, Clone)]
pub struct CheckerData<'a, 'b>(pub partial!('a Context<'b>, VariablesP));
impl<'a, 'b> CheckerData<'a, 'b> {
pub fn user_from_proof_var(self, proof_var: Var) -> Option<Var> {
let variables = self.0.part(VariablesP);
variables
.var_data
.get(proof_var.index())
.and_then(|var_data| {
var_data.user_var.or_else(|| {
if var_data.sampling_mode == SamplingMode::Sample {
Some(proof_var)
} else {
None
}
})
})
}
}
pub trait ProofProcessor {
fn process_step(&mut self, step: &CheckedProofStep, data: CheckerData) -> Result<(), Error>;
}
#[derive(Default)]
pub struct Processing<'a> {
pub processors: Vec<&'a mut dyn ProofProcessor>,
pub transcript_processors: Vec<&'a mut dyn ProofTranscriptProcessor>,
transcript: transcript::Transcript,
}
impl<'a> Processing<'a> {
pub fn step<'b>(
&mut self,
step: &CheckedProofStep<'b>,
data: CheckerData,
) -> Result<(), CheckerError> {
for processor in self.processors.iter_mut() {
if let Err(err) = processor.process_step(step, data) {
return Err(CheckerError::ProofProcessorError { cause: err });
}
}
if !self.transcript_processors.is_empty() {
if let Some(transcript_step) = self.transcript.transcript_step(step, data) {
for processor in self.transcript_processors.iter_mut() {
if let Err(err) = processor.process_step(&transcript_step) {
return Err(CheckerError::ProofProcessorError { cause: err });
}
}
}
}
Ok(())
}
}
pub fn process_step<'a, 'b>(
mut ctx: partial!(Context<'a>, mut ProcessingP<'a>, VariablesP),
step: &CheckedProofStep<'b>,
) -> Result<(), CheckerError> {
let (processing, mut ctx) = ctx.split_part_mut(ProcessingP);
processing.step(step, CheckerData(ctx.borrow()))
}