blob: 7744df8244a6a0ff7a53d75296fa3aa35a4aae88 (
plain)
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
|
/********************* */
/*! \file nl_ext_purify.h
** \verbatim
** Top contributors (to current version):
** Haniel Barbosa
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief The NlExtPurify preprocessing pass
**
** Purifies non-linear terms by replacing sums under multiplications by fresh
** variables
**/
#include "cvc4_private.h"
#ifndef CVC4__PREPROCESSING__PASSES__NL_EXT_PURIFY_H
#define CVC4__PREPROCESSING__PASSES__NL_EXT_PURIFY_H
#include <unordered_map>
#include <vector>
#include "expr/node.h"
#include "preprocessing/preprocessing_pass.h"
#include "preprocessing/preprocessing_pass_context.h"
namespace CVC4 {
namespace preprocessing {
namespace passes {
using NodeMap = std::unordered_map<Node, Node, NodeHashFunction>;
class NlExtPurify : public PreprocessingPass
{
public:
NlExtPurify(PreprocessingPassContext* preprocContext);
protected:
PreprocessingPassResult applyInternal(
AssertionPipeline* assertionsToPreprocess) override;
private:
Node purifyNlTerms(TNode n,
NodeMap& cache,
NodeMap& bcache,
std::vector<Node>& var_eq,
bool beneathMult = false);
};
} // namespace passes
} // namespace preprocessing
} // namespace CVC4
#endif /* CVC4__PREPROCESSING__PASSES__NL_EXT_PURIFY_H */
|
