spot  2.11.6
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
spot::random_ltl Class Reference

Generate random LTL formulae. More...

#include <spot/tl/randomltl.hh>

Inheritance diagram for spot::random_ltl:
Collaboration diagram for spot::random_ltl:

Public Member Functions

 random_ltl (const atomic_prop_set *ap)
 
const atomic_prop_setap () const
 Return the set of atomic proposition used to build formulae. More...
 
formula generate (int n) const
 Generate a formula of size n. More...
 
std::ostream & dump_priorities (std::ostream &os) const
 Print the priorities of each operator, constants, and atomic propositions. More...
 
const char * parse_options (char *options)
 Update the priorities used to generate the formulae. More...
 

Protected Member Functions

void setup_proba_ ()
 
 random_ltl (int size, const atomic_prop_set *ap)
 
void update_sums ()
 

Protected Attributes

unsigned proba_size_
 
op_probaproba_
 
double total_1_
 
op_probaproba_2_
 
double total_2_
 
op_probaproba_2_or_more_
 
double total_2_and_more_
 
const atomic_prop_setap_
 

Detailed Description

Generate random LTL formulae.

This class recursively constructs LTL formulae of a given size. The formulae will use the use atomic propositions from the set of propositions passed to the constructor, in addition to the constant and all LTL operators supported by Spot.

By default each operator has equal chance to be selected. Also, each atomic proposition has as much chance as each constant (i.e., true and false) to be picked. This can be tuned using parse_options().

Constructor & Destructor Documentation

◆ random_ltl()

spot::random_ltl::random_ltl ( const atomic_prop_set ap)

Create a random LTL generator using atomic propositions from ap.

The default priorities are defined as follows:

ap      n
false   1
true    1
not     1
F       1
G       1
X       1
equiv   1
implies 1
xor     1
R       1
U       1
W       1
M       1
and     1
or      1

Where n is the number of atomic propositions in the set passed to the constructor.

This means that each operator has equal chance to be selected. Also, each atomic proposition has as much chance as each constant (i.e., true and false) to be picked.

These priorities can be changed use the parse_options method.

Member Function Documentation

◆ ap()

const atomic_prop_set* spot::random_formula::ap ( ) const
inlineinherited

Return the set of atomic proposition used to build formulae.

◆ dump_priorities()

std::ostream& spot::random_formula::dump_priorities ( std::ostream &  os) const
inherited

Print the priorities of each operator, constants, and atomic propositions.

◆ generate()

formula spot::random_formula::generate ( int  n) const
inherited

Generate a formula of size n.

It is possible to obtain formulae that are smaller than n, because some simple simplifications are performed by the AST. (For instance the formula a | a is automatically reduced to a by spot::multop.)

◆ parse_options()

const char* spot::random_formula::parse_options ( char *  options)
inherited

Update the priorities used to generate the formulae.

options should be comma-separated list of KEY=VALUE assignments, using keys from the above list. For instance "xor=0, F=3" will prevent xor from being used, and will raise the relative probability of occurrences of the F operator.


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

Please direct any question, comment, or bug report to the Spot mailing list at spot@lrde.epita.fr.
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