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
|
/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds, Aina Niemetz
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 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.
* ****************************************************************************
*
* Implementation of Decision manager, which manages all decision
* strategies owned by theory solvers within TheoryEngine.
*/
#include "theory/decision_manager.h"
#include "theory/rewriter.h"
using namespace cvc5::kind;
namespace cvc5 {
namespace theory {
DecisionManager::DecisionManager(context::Context* userContext)
: d_strategyCacheC(userContext)
{
}
void DecisionManager::presolve()
{
Trace("dec-manager") << "DecisionManager: presolve." << std::endl;
// remove the strategies that are not in this user context
std::unordered_set<DecisionStrategy*> active;
for (DecisionStrategyList::const_iterator i = d_strategyCacheC.begin();
i != d_strategyCacheC.end();
++i)
{
active.insert(*i);
}
active.insert(d_strategyCache.begin(), d_strategyCache.end());
std::map<StrategyId, std::vector<DecisionStrategy*> > tmp = d_reg_strategy;
d_reg_strategy.clear();
for (std::pair<const StrategyId, std::vector<DecisionStrategy*> >& rs : tmp)
{
for (DecisionStrategy* ds : rs.second)
{
if (active.find(ds) != active.end())
{
// if its active, we keep it
d_reg_strategy[rs.first].push_back(ds);
}
}
}
}
void DecisionManager::registerStrategy(StrategyId id,
DecisionStrategy* ds,
StrategyScope sscope)
{
Trace("dec-manager") << "DecisionManager: Register strategy : "
<< ds->identify() << ", id = " << id << std::endl;
ds->initialize();
d_reg_strategy[id].push_back(ds);
if (sscope == STRAT_SCOPE_USER_CTX_DEPENDENT)
{
// store it in the user-context-dependent list
d_strategyCacheC.push_back(ds);
}
else if (sscope == STRAT_SCOPE_CTX_INDEPENDENT)
{
// it is context independent
d_strategyCache.insert(ds);
}
else
{
// it is local to this call, we don't cache it
Assert(sscope == STRAT_SCOPE_LOCAL_SOLVE);
}
}
Node DecisionManager::getNextDecisionRequest()
{
Trace("dec-manager-debug")
<< "DecisionManager: Get next decision..." << std::endl;
for (const std::pair<const StrategyId, std::vector<DecisionStrategy*> >& rs :
d_reg_strategy)
{
for (unsigned i = 0, size = rs.second.size(); i < size; i++)
{
DecisionStrategy* ds = rs.second[i];
Node lit = ds->getNextDecisionRequest();
if (!lit.isNull())
{
Trace("dec-manager")
<< "DecisionManager: -> literal " << lit << " decided by strategy "
<< ds->identify() << std::endl;
return lit;
}
Trace("dec-manager-debug") << "DecisionManager: " << ds->identify()
<< " has no decisions." << std::endl;
}
}
Trace("dec-manager-debug")
<< "DecisionManager: -> no decisions." << std::endl;
return Node::null();
}
} // namespace theory
} // namespace cvc5
|
