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optimize Class Reference

#include <z3++.h>

+ Inheritance diagram for optimize:

Data Structures

class  handle
 

Public Member Functions

 optimize (context &c)
 
 optimize (optimize const &o)
 
 optimize (context &c, optimize &src)
 
optimizeoperator= (optimize const &o)
 
 ~optimize ()
 
 operator Z3_optimize () const
 
void add (expr const &e)
 
void add (expr_vector const &es)
 
void add (expr const &e, expr const &t)
 
void add (expr const &e, char const *p)
 
handle add_soft (expr const &e, unsigned weight)
 
handle add_soft (expr const &e, char const *weight)
 
handle add (expr const &e, unsigned weight)
 
handle maximize (expr const &e)
 
handle minimize (expr const &e)
 
void push ()
 
void pop ()
 
check_result check ()
 
check_result check (expr_vector const &asms)
 
model get_model () const
 
expr_vector unsat_core () const
 
void set (params const &p)
 
expr lower (handle const &h)
 
expr upper (handle const &h)
 
expr_vector assertions () const
 
expr_vector objectives () const
 
stats statistics () const
 
void from_file (char const *filename)
 
void from_string (char const *constraints)
 
std::string help () const
 
- Public Member Functions inherited from object
 object (context &c)
 
contextctx () const
 
Z3_error_code check_error () const
 

Friends

std::ostream & operator<< (std::ostream &out, optimize const &s)
 

Additional Inherited Members

- Protected Attributes inherited from object
contextm_ctx
 

Detailed Description

Definition at line 3247 of file z3++.h.

Constructor & Destructor Documentation

◆ optimize() [1/3]

optimize ( context c)
inline

Definition at line 3257 of file z3++.h.

3257:object(c) { m_opt = Z3_mk_optimize(c); Z3_optimize_inc_ref(c, m_opt); }
object(context &c)
Definition z3++.h:472
void Z3_API Z3_optimize_inc_ref(Z3_context c, Z3_optimize d)
Increment the reference counter of the given optimize context.
Z3_optimize Z3_API Z3_mk_optimize(Z3_context c)
Create a new optimize context.

◆ optimize() [2/3]

optimize ( optimize const o)
inline

Definition at line 3258 of file z3++.h.

3258 :object(o), m_opt(o.m_opt) {
3259 Z3_optimize_inc_ref(o.ctx(), o.m_opt);
3260 }

◆ optimize() [3/3]

optimize ( context c,
optimize src 
)
inline

Definition at line 3261 of file z3++.h.

3261 :object(c) {
3262 m_opt = Z3_mk_optimize(c);
3263 Z3_optimize_inc_ref(c, m_opt);
3264 add(expr_vector(c, src.assertions()));
3265 expr_vector v(c, src.objectives());
3266 for (expr_vector::iterator it = v.begin(); it != v.end(); ++it) minimize(*it);
3267 }
void add(expr const &e)
Definition z3++.h:3277
handle minimize(expr const &e)
Definition z3++.h:3307
ast_vector_tpl< expr > expr_vector
Definition z3++.h:76

◆ ~optimize()

~optimize ( )
inline

Definition at line 3275 of file z3++.h.

3275{ Z3_optimize_dec_ref(ctx(), m_opt); }
context & ctx() const
Definition z3++.h:473
void Z3_API Z3_optimize_dec_ref(Z3_context c, Z3_optimize d)
Decrement the reference counter of the given optimize context.

Member Function Documentation

◆ add() [1/5]

void add ( expr const e)
inline

Definition at line 3277 of file z3++.h.

3277 {
3278 assert(e.is_bool());
3279 Z3_optimize_assert(ctx(), m_opt, e);
3280 }
void Z3_API Z3_optimize_assert(Z3_context c, Z3_optimize o, Z3_ast a)
Assert hard constraint to the optimization context.

Referenced by Solver::__iadd__(), optimize::add(), optimize::add(), and optimize::optimize().

◆ add() [2/5]

void add ( expr const e,
char const p 
)
inline

Definition at line 3288 of file z3++.h.

3288 {
3289 assert(e.is_bool());
3290 add(e, ctx().bool_const(p));
3291 }

Referenced by Solver::__iadd__().

◆ add() [3/5]

void add ( expr const e,
expr const t 
)
inline

Definition at line 3284 of file z3++.h.

3284 {
3285 assert(e.is_bool());
3286 Z3_optimize_assert_and_track(ctx(), m_opt, e, t);
3287 }
void Z3_API Z3_optimize_assert_and_track(Z3_context c, Z3_optimize o, Z3_ast a, Z3_ast t)
Assert tracked hard constraint to the optimization context.

Referenced by Solver::__iadd__().

◆ add() [4/5]

handle add ( expr const e,
unsigned  weight 
)
inline

Definition at line 3301 of file z3++.h.

3301 {
3302 return add_soft(e, weight);
3303 }
handle add_soft(expr const &e, unsigned weight)
Definition z3++.h:3292

Referenced by Solver::__iadd__().

◆ add() [5/5]

void add ( expr_vector const es)
inline

Definition at line 3281 of file z3++.h.

3281 {
3282 for (expr_vector::iterator it = es.begin(); it != es.end(); ++it) add(*it);
3283 }

Referenced by Solver::__iadd__().

◆ add_soft() [1/2]

handle add_soft ( expr const e,
char const weight 
)
inline

Definition at line 3297 of file z3++.h.

3297 {
3298 assert(e.is_bool());
3299 return handle(Z3_optimize_assert_soft(ctx(), m_opt, e, weight, 0));
3300 }
unsigned Z3_API Z3_optimize_assert_soft(Z3_context c, Z3_optimize o, Z3_ast a, Z3_string weight, Z3_symbol id)
Assert soft constraint to the optimization context.

◆ add_soft() [2/2]

handle add_soft ( expr const e,
unsigned  weight 
)
inline

Definition at line 3292 of file z3++.h.

3292 {
3293 assert(e.is_bool());
3294 auto str = std::to_string(weight);
3295 return handle(Z3_optimize_assert_soft(ctx(), m_opt, e, str.c_str(), 0));
3296 }

Referenced by optimize::add().

◆ assertions()

expr_vector assertions ( ) const
inline

Definition at line 3341 of file z3++.h.

3341{ Z3_ast_vector r = Z3_optimize_get_assertions(ctx(), m_opt); check_error(); return expr_vector(ctx(), r); }
Z3_error_code check_error() const
Definition z3++.h:474
Z3_ast_vector Z3_API Z3_optimize_get_assertions(Z3_context c, Z3_optimize o)
Return the set of asserted formulas on the optimization context.

◆ check() [1/2]

check_result check ( )
inline

Definition at line 3316 of file z3++.h.

3316{ Z3_lbool r = Z3_optimize_check(ctx(), m_opt, 0, 0); check_error(); return to_check_result(r); }
Z3_lbool
Lifted Boolean type: false, undefined, true.
Definition z3_api.h:61
Z3_lbool Z3_API Z3_optimize_check(Z3_context c, Z3_optimize o, unsigned num_assumptions, Z3_ast const assumptions[])
Check consistency and produce optimal values.
check_result to_check_result(Z3_lbool l)
Definition z3++.h:147

◆ check() [2/2]

check_result check ( expr_vector const asms)
inline

Definition at line 3317 of file z3++.h.

3317 {
3318 unsigned n = asms.size();
3319 array<Z3_ast> _asms(n);
3320 for (unsigned i = 0; i < n; i++) {
3321 check_context(*this, asms[i]);
3322 _asms[i] = asms[i];
3323 }
3324 Z3_lbool r = Z3_optimize_check(ctx(), m_opt, n, _asms.ptr());
3325 check_error();
3326 return to_check_result(r);
3327 }
friend void check_context(object const &a, object const &b)
Definition z3++.h:477

◆ from_file()

void from_file ( char const filename)
inline

Definition at line 3345 of file z3++.h.

3345{ Z3_optimize_from_file(ctx(), m_opt, filename); check_error(); }
void Z3_API Z3_optimize_from_file(Z3_context c, Z3_optimize o, Z3_string s)
Parse an SMT-LIB2 file with assertions, soft constraints and optimization objectives....

◆ from_string()

void from_string ( char const constraints)
inline

Definition at line 3346 of file z3++.h.

3346{ Z3_optimize_from_string(ctx(), m_opt, constraints); check_error(); }
void Z3_API Z3_optimize_from_string(Z3_context c, Z3_optimize o, Z3_string s)
Parse an SMT-LIB2 string with assertions, soft constraints and optimization objectives....

◆ get_model()

model get_model ( ) const
inline

Definition at line 3328 of file z3++.h.

3328{ Z3_model m = Z3_optimize_get_model(ctx(), m_opt); check_error(); return model(ctx(), m); }
Z3_model Z3_API Z3_optimize_get_model(Z3_context c, Z3_optimize o)
Retrieve the model for the last Z3_optimize_check.

◆ help()

std::string help ( ) const
inline

Definition at line 3347 of file z3++.h.

3347{ char const * r = Z3_optimize_get_help(ctx(), m_opt); check_error(); return r; }
Z3_string Z3_API Z3_optimize_get_help(Z3_context c, Z3_optimize t)
Return a string containing a description of parameters accepted by optimize.

◆ lower()

expr lower ( handle const h)
inline

Definition at line 3331 of file z3++.h.

3331 {
3332 Z3_ast r = Z3_optimize_get_lower(ctx(), m_opt, h.h());
3333 check_error();
3334 return expr(ctx(), r);
3335 }
Z3_ast Z3_API Z3_optimize_get_lower(Z3_context c, Z3_optimize o, unsigned idx)
Retrieve lower bound value or approximation for the i'th optimization objective.

◆ maximize()

handle maximize ( expr const e)
inline

Definition at line 3304 of file z3++.h.

3304 {
3305 return handle(Z3_optimize_maximize(ctx(), m_opt, e));
3306 }
unsigned Z3_API Z3_optimize_maximize(Z3_context c, Z3_optimize o, Z3_ast t)
Add a maximization constraint.

◆ minimize()

handle minimize ( expr const e)
inline

Definition at line 3307 of file z3++.h.

3307 {
3308 return handle(Z3_optimize_minimize(ctx(), m_opt, e));
3309 }
unsigned Z3_API Z3_optimize_minimize(Z3_context c, Z3_optimize o, Z3_ast t)
Add a minimization constraint.

Referenced by optimize::optimize().

◆ objectives()

expr_vector objectives ( ) const
inline

Definition at line 3342 of file z3++.h.

3342{ Z3_ast_vector r = Z3_optimize_get_objectives(ctx(), m_opt); check_error(); return expr_vector(ctx(), r); }
Z3_ast_vector Z3_API Z3_optimize_get_objectives(Z3_context c, Z3_optimize o)
Return objectives on the optimization context. If the objective function is a max-sat objective it is...

◆ operator Z3_optimize()

operator Z3_optimize ( ) const
inline

Definition at line 3276 of file z3++.h.

3276{ return m_opt; }

◆ operator=()

optimize & operator= ( optimize const o)
inline

Definition at line 3268 of file z3++.h.

3268 {
3269 Z3_optimize_inc_ref(o.ctx(), o.m_opt);
3270 Z3_optimize_dec_ref(ctx(), m_opt);
3271 m_opt = o.m_opt;
3272 object::operator=(o);
3273 return *this;
3274 }

◆ pop()

void pop ( )
inline

Definition at line 3313 of file z3++.h.

3313 {
3314 Z3_optimize_pop(ctx(), m_opt);
3315 }
void Z3_API Z3_optimize_pop(Z3_context c, Z3_optimize d)
Backtrack one level.

◆ push()

void push ( )
inline

Definition at line 3310 of file z3++.h.

3310 {
3311 Z3_optimize_push(ctx(), m_opt);
3312 }
void Z3_API Z3_optimize_push(Z3_context c, Z3_optimize d)
Create a backtracking point.

◆ set()

void set ( params const p)
inline

Definition at line 3330 of file z3++.h.

3330{ Z3_optimize_set_params(ctx(), m_opt, p); check_error(); }
void Z3_API Z3_optimize_set_params(Z3_context c, Z3_optimize o, Z3_params p)
Set parameters on optimization context.

◆ statistics()

stats statistics ( ) const
inline

Definition at line 3343 of file z3++.h.

3343{ Z3_stats r = Z3_optimize_get_statistics(ctx(), m_opt); check_error(); return stats(ctx(), r); }
Z3_stats Z3_API Z3_optimize_get_statistics(Z3_context c, Z3_optimize d)
Retrieve statistics information from the last call to Z3_optimize_check.

◆ unsat_core()

expr_vector unsat_core ( ) const
inline

Definition at line 3329 of file z3++.h.

3329{ Z3_ast_vector r = Z3_optimize_get_unsat_core(ctx(), m_opt); check_error(); return expr_vector(ctx(), r); }
Z3_ast_vector Z3_API Z3_optimize_get_unsat_core(Z3_context c, Z3_optimize o)
Retrieve the unsat core for the last Z3_optimize_check The unsat core is a subset of the assumptions ...

◆ upper()

expr upper ( handle const h)
inline

Definition at line 3336 of file z3++.h.

3336 {
3337 Z3_ast r = Z3_optimize_get_upper(ctx(), m_opt, h.h());
3338 check_error();
3339 return expr(ctx(), r);
3340 }
Z3_ast Z3_API Z3_optimize_get_upper(Z3_context c, Z3_optimize o, unsigned idx)
Retrieve upper bound value or approximation for the i'th optimization objective.

Friends And Related Symbol Documentation

◆ operator<<

std::ostream & operator<< ( std::ostream &  out,
optimize const s 
)
friend

Definition at line 3349 of file z3++.h.

3349{ out << Z3_optimize_to_string(s.ctx(), s.m_opt); return out; }
Z3_string Z3_API Z3_optimize_to_string(Z3_context c, Z3_optimize o)
Print the current context as a string.