blob: 239256699d36f077f9c48e30f2d1c931c60da7f2 (
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
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
|
/**CFile****************************************************************
FileName [msatActivity.c]
PackageName [A C version of SAT solver MINISAT, originally developed
in C++ by Niklas Een and Niklas Sorensson, Chalmers University of
Technology, Sweden: http://www.cs.chalmers.se/~een/Satzoo.]
Synopsis [Procedures controlling activity of variables and clauses.]
Author [Alan Mishchenko <alanmi@eecs.berkeley.edu>]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - January 1, 2004.]
Revision [$Id: msatActivity.c,v 1.0 2004/01/01 1:00:00 alanmi Exp $]
***********************************************************************/
#include "msatInt.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Msat_SolverVarBumpActivity( Msat_Solver_t * p, Msat_Lit_t Lit )
{
Msat_Var_t Var;
if ( p->dVarDecay < 0 ) // (negative decay means static variable order -- don't bump)
return;
Var = MSAT_LIT2VAR(Lit);
if ( (p->pdActivity[Var] += p->dVarInc) > 1e100 )
// if ( (p->pdActivity[Var] += p->dVarInc * (1.0 + 0.005*p->pActLevels[Var])) > 1e100 )
Msat_SolverVarRescaleActivity( p );
Msat_OrderUpdate( p->pOrder, Var );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Msat_SolverVarDecayActivity( Msat_Solver_t * p )
{
if ( p->dVarDecay >= 0 )
p->dVarInc *= p->dVarDecay;
}
/**Function*************************************************************
Synopsis [Divide all variable activities by 1e100.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Msat_SolverVarRescaleActivity( Msat_Solver_t * p )
{
int i;
for ( i = 0; i < p->nVars; i++ )
p->pdActivity[i] *= 1e-100;
p->dVarInc *= 1e-100;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Msat_SolverClaBumpActivity( Msat_Solver_t * p, Msat_Clause_t * pC )
{
float Activ;
Activ = Msat_ClauseReadActivity(pC);
if ( Activ + p->dClaInc > 1e20 )
{
Msat_SolverClaRescaleActivity( p );
Activ = Msat_ClauseReadActivity( pC );
}
Msat_ClauseWriteActivity( pC, Activ + (float)p->dClaInc );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Msat_SolverClaDecayActivity( Msat_Solver_t * p )
{
p->dClaInc *= p->dClaDecay;
}
/**Function*************************************************************
Synopsis [Divide all constraint activities by 1e20.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Msat_SolverClaRescaleActivity( Msat_Solver_t * p )
{
Msat_Clause_t ** pLearned;
int nLearned, i;
float Activ;
nLearned = Msat_ClauseVecReadSize( p->vLearned );
pLearned = Msat_ClauseVecReadArray( p->vLearned );
for ( i = 0; i < nLearned; i++ )
{
Activ = Msat_ClauseReadActivity( pLearned[i] );
Msat_ClauseWriteActivity( pLearned[i], Activ * (float)1e-20 );
}
p->dClaInc *= 1e-20;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
