#include <cnf.h>

Inheritance diagram for cnft:

Collaboration diagram for cnft:

Public Member Functions
	cnft ()

virtual	~cnft ()

virtual literalt	land (literalt a, literalt b) override

virtual literalt	lor (literalt a, literalt b) override

virtual literalt	land (const bvt &bv) override
	Tseitin encoding of conjunction between multiple literals. More...

virtual literalt	lor (const bvt &bv) override
	Tseitin encoding of disjunction between multiple literals. More...

virtual literalt	lxor (const bvt &bv) override
	Tseitin encoding of XOR between multiple literals. More...

virtual literalt	lxor (literalt a, literalt b) override

virtual literalt	lnand (literalt a, literalt b) override

virtual literalt	lnor (literalt a, literalt b) override

virtual literalt	lequal (literalt a, literalt b) override

virtual literalt	limplies (literalt a, literalt b) override

virtual literalt	lselect (literalt a, literalt b, literalt c) override

virtual literalt	new_variable () override
	Generate a new variable and return it as a literal. More...

virtual size_t	no_variables () const override

virtual void	set_no_variables (size_t no)

virtual size_t	no_clauses () const =0

void	gate_and (literalt a, literalt b, literalt o)
	Tseitin encoding of conjunction of two literals. More...

void	gate_or (literalt a, literalt b, literalt o)
	Tseitin encoding of disjunction of two literals. More...

void	gate_xor (literalt a, literalt b, literalt o)
	Tseitin encoding of XOR of two literals. More...

void	gate_nand (literalt a, literalt b, literalt o)
	Tseitin encoding of NAND of two literals. More...

void	gate_nor (literalt a, literalt b, literalt o)
	Tseitin encoding of NOR of two literals. More...

void	gate_equal (literalt a, literalt b, literalt o)
	Tseitin encoding of equality between two literals. More...

void	gate_implies (literalt a, literalt b, literalt o)
	Tseitin encoding of implication between two literals. More...

Public Member Functions inherited from propt
	propt ()

virtual	~propt ()

virtual void	set_equal (literalt a, literalt b)
	asserts a==b in the propositional formula More...

virtual void	l_set_to (literalt a, bool value)

void	l_set_to_true (literalt a)

void	l_set_to_false (literalt a)

void	lcnf (literalt l0, literalt l1)

void	lcnf (literalt l0, literalt l1, literalt l2)

void	lcnf (literalt l0, literalt l1, literalt l2, literalt l3)

virtual void	lcnf (const bvt &bv)=0

virtual bool	has_set_to () const

virtual bool	cnf_handled_well () const

virtual void	set_assumptions (const bvt &)

virtual bool	has_set_assumptions () const

virtual void	set_variable_name (literalt, const irep_idt &)

bvt	new_variables (std::size_t width)
	generates a bitvector of given width with new variables More...

virtual const std::string	solver_text ()=0

virtual resultt	prop_solve ()=0

virtual tvt	l_get (literalt a) const =0

virtual void	set_assignment (literalt a, bool value)=0

virtual bool	is_in_conflict (literalt l) const =0
	Returns true if an assumption is in the final conflict. More...

virtual bool	has_is_in_conflict () const

virtual void	set_frozen (literalt)

virtual void	set_time_limit_seconds (uint32_t)

Public Member Functions inherited from messaget
virtual void	set_message_handler (message_handlert &_message_handler)

message_handlert &	get_message_handler ()

	messaget ()

	messaget (const messaget &other)

messaget &	operator= (const messaget &other)

	messaget (message_handlert &_message_handler)

virtual	~messaget ()

mstreamt &	get_mstream (unsigned message_level) const

mstreamt &	error () const

mstreamt &	warning () const

mstreamt &	result () const

mstreamt &	status () const

mstreamt &	statistics () const

mstreamt &	progress () const

mstreamt &	debug () const

void	conditional_output (mstreamt &mstream, const std::function< void(mstreamt &)> &output_generator) const
	Generate output to `message_stream` using `output_generator` if the configured verbosity is at least as high as that of `message_stream`. More...

Static Public Member Functions
static bvt	eliminate_duplicates (const bvt &)
	eliminate duplicates from given vector of literals More...

Static Public Member Functions inherited from messaget
static unsigned	eval_verbosity (const std::string &user_input, const message_levelt default_verbosity, message_handlert &dest)
	Parse a (user-)provided string as a verbosity level and set it as the verbosity of dest. More...

static commandt	command (unsigned c)
	Create an ECMA-48 SGR (Select Graphic Rendition) command. More...

Protected Member Functions
bool	process_clause (const bvt &bv, bvt &dest)
	filter 'true' from clause, eliminate duplicates, recognise trivially satisfied clauses More...

Static Protected Member Functions
static bool	is_all (const bvt &bv, literalt l)

Protected Attributes
size_t	_no_variables

Protected Attributes inherited from propt
bvt	lcnf_bv

Protected Attributes inherited from messaget
message_handlert *	message_handler

mstreamt	mstream

Additional Inherited Members
Public Types inherited from propt
enum	resultt { resultt::P_SATISFIABLE, resultt::P_UNSATISFIABLE, resultt::P_ERROR }

Public Types inherited from messaget
enum	message_levelt { M_ERROR =1, M_WARNING =2, M_RESULT =4, M_STATUS =6, M_STATISTICS =8, M_PROGRESS =9, M_DEBUG =10 }

Static Public Attributes inherited from messaget
static eomt	eom

static const commandt	reset
	return to default formatting, as defined by the terminal More...

static const commandt	red
	render text with red foreground color More...

static const commandt	green
	render text with green foreground color More...

static const commandt	yellow
	render text with yellow foreground color More...

static const commandt	blue
	render text with blue foreground color More...

static const commandt	magenta
	render text with magenta foreground color More...

static const commandt	cyan
	render text with cyan foreground color More...

static const commandt	bright_red
	render text with bright red foreground color More...

static const commandt	bright_green
	render text with bright green foreground color More...

static const commandt	bright_yellow
	render text with bright yellow foreground color More...

static const commandt	bright_blue
	render text with bright blue foreground color More...

static const commandt	bright_magenta
	render text with bright magenta foreground color More...

static const commandt	bright_cyan
	render text with bright cyan foreground color More...

static const commandt	bold
	render text with bold font More...

static const commandt	faint
	render text with faint font More...

static const commandt	italic
	render italic text More...

static const commandt	underline
	render underlined text More...

Detailed Description

Definition at line 17 of file cnf.h.

Constructor & Destructor Documentation

◆ cnft()

cnft::cnft ( )

inline

Definition at line 22 of file cnf.h.

◆ ~cnft()

virtual cnft::~cnft ( )

inlinevirtual

Definition at line 23 of file cnf.h.

Member Function Documentation

◆ eliminate_duplicates()

bvt cnft::eliminate_duplicates ( const bvt & bv )

static

eliminate duplicates from given vector of literals

parameters: set of literals given as vector

Returns: set of literals, duplicates removed

Definition at line 400 of file cnf.cpp.

◆ gate_and()

void cnft::gate_and	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of conjunction of two literals.

parameters: Two input signals to the AND gate, one output

Returns: Side effect: add clauses that encodes relation between inputs/output via lcnf

Definition at line 25 of file cnf.cpp.

◆ gate_equal()

void cnft::gate_equal	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of equality between two literals.

parameters: Two input signals to the EQUAL gate, one output

Definition at line 145 of file cnf.cpp.

◆ gate_implies()

void cnft::gate_implies	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of implication between two literals.

parameters: Two input signals to the IMPLIES gate, one output

Definition at line 152 of file cnf.cpp.

◆ gate_nand()

void cnft::gate_nand	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of NAND of two literals.

parameters: Two input signals to the NAND gate, one output

Definition at line 101 of file cnf.cpp.

◆ gate_nor()

void cnft::gate_nor	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of NOR of two literals.

parameters: Two input signals to the NOR gate, one output

Definition at line 123 of file cnf.cpp.

◆ gate_or()

void cnft::gate_or	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of disjunction of two literals.

parameters: Two input signals to the OR gate, one output

Definition at line 48 of file cnf.cpp.

◆ gate_xor()

void cnft::gate_xor	(	literalt	a,
		literalt	b,
		literalt	o
	)

Tseitin encoding of XOR of two literals.

parameters: Two input signals to the XOR gate, one output

Definition at line 70 of file cnf.cpp.

◆ is_all()

static bool cnft::is_all	(	const bvt &	bv,
		literalt	l
	)

inlinestaticprotected

Definition at line 57 of file cnf.h.

◆ land() [1/2]

literalt cnft::land	(	literalt	a,
		literalt	b
	)

overridevirtual

parameters: Two inputs to the AND gate

Returns: Output signal of the AND gate as literal

Implements propt.

Definition at line 265 of file cnf.cpp.

◆ land() [2/2]

literalt cnft::land ( const bvt & bv )

overridevirtual

Tseitin encoding of conjunction between multiple literals.

parameters: Any number of inputs to the AND gate

Returns: Output signal of the AND gate as literal

Implements propt.

Definition at line 160 of file cnf.cpp.

◆ lequal()

literalt cnft::lequal	(	literalt	a,
		literalt	b
	)

overridevirtual

Implements propt.

Definition at line 331 of file cnf.cpp.

◆ limplies()

literalt cnft::limplies	(	literalt	a,
		literalt	b
	)

overridevirtual

Implements propt.

Definition at line 336 of file cnf.cpp.

◆ lnand()

literalt cnft::lnand	(	literalt	a,
		literalt	b
	)

overridevirtual

parameters: Two inputs to the NAND gate

Returns: Output signal of the NAND gate as literal

Implements propt.

Definition at line 319 of file cnf.cpp.

◆ lnor()

literalt cnft::lnor	(	literalt	a,
		literalt	b
	)

overridevirtual

parameters: Two inputs to the NOR gate

Returns: Output signal of the NOR gate as literal

Implements propt.

Definition at line 326 of file cnf.cpp.

◆ lor() [1/2]

literalt cnft::lor	(	literalt	a,
		literalt	b
	)

overridevirtual

parameters: Two inputs to the OR gate

Returns: Output signal of the OR gate as literal

Implements propt.

Reimplemented in qbf_bdd_coret.

Definition at line 281 of file cnf.cpp.

◆ lor() [2/2]

literalt cnft::lor ( const bvt & bv )

overridevirtual

Tseitin encoding of disjunction between multiple literals.

parameters: Any number of inputs to the OR gate

Returns: Output signal of the OR gate as literal

Implements propt.

Reimplemented in qbf_bdd_coret.

Definition at line 203 of file cnf.cpp.

◆ lselect()

literalt cnft::lselect	(	literalt	a,
		literalt	b,
		literalt	c
	)

overridevirtual

Implements propt.

Definition at line 346 of file cnf.cpp.

◆ lxor() [1/2]

literalt cnft::lxor ( const bvt & bv )

overridevirtual

Tseitin encoding of XOR between multiple literals.

parameters: Any number of inputs to the XOR gate

Returns: Output signal of the XOR gate as literal

Implements propt.

Definition at line 246 of file cnf.cpp.

◆ lxor() [2/2]

literalt cnft::lxor	(	literalt	a,
		literalt	b
	)

overridevirtual

parameters: Two inputs to the XOR gate

Returns: Output signal of the XOR gate as literal

Implements propt.

Definition at line 297 of file cnf.cpp.

◆ new_variable()

literalt cnft::new_variable ( void )

overridevirtual

Generate a new variable and return it as a literal.

Returns: New variable as literal

Implements propt.

Reimplemented in qbf_bdd_coret, and qbf_bdd_certificatet.

Definition at line 387 of file cnf.cpp.

◆ no_clauses()

virtual size_t cnft::no_clauses ( ) const

pure virtual

Implemented in cnf_solvert, dimacs_cnf_dumpt, qbf_squolem_coret, cnf_clause_listt, and qbf_squolemt.

◆ no_variables()

virtual size_t cnft::no_variables ( ) const

inlineoverridevirtual

Implements propt.

Definition at line 38 of file cnf.h.

◆ process_clause()

bool cnft::process_clause	(	const bvt &	bv,
		bvt &	dest
	)

protected

filter 'true' from clause, eliminate duplicates, recognise trivially satisfied clauses

Definition at line 416 of file cnf.cpp.

◆ set_no_variables()

virtual void cnft::set_no_variables ( size_t no )

inlinevirtual

Reimplemented in qbf_squolem_coret, and qbf_squolemt.

Definition at line 39 of file cnf.h.

Member Data Documentation

◆ _no_variables

size_t cnft::_no_variables

protected

Definition at line 53 of file cnf.h.

The documentation for this class was generated from the following files:

solvers/sat/cnf.h
solvers/sat/cnf.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ cnft()

◆ ~cnft()

Member Function Documentation

◆ eliminate_duplicates()

◆ gate_and()

◆ gate_equal()

◆ gate_implies()

◆ gate_nand()

◆ gate_nor()

◆ gate_or()

◆ gate_xor()

◆ is_all()

◆ land() [1/2]

◆ land() [2/2]

◆ lequal()

◆ limplies()

◆ lnand()

◆ lnor()

◆ lor() [1/2]

◆ lor() [2/2]

◆ lselect()

◆ lxor() [1/2]

◆ lxor() [2/2]

◆ new_variable()

◆ no_clauses()

◆ no_variables()

◆ process_clause()

◆ set_no_variables()

Member Data Documentation

◆ _no_variables