Difference between revisions of "Sets"

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|-
 
|-
 
| TRANSPOSE
 
| TRANSPOSE
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| <code>X '''<nowiki>|</nowiki>''' Y</code>
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| <code>'''<nowiki>TRANSPOSE</nowiki>'''(X) </code>
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| <code>('''union''' X Y)</code>
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| <code> -- </code>
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| <code>em.mkExpr('''kind::UNION''', X, Y);</code>
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| <code> -- </code>
 
|-
 
|-
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| Intersection
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| Transitive Closure
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| <code>X '''<nowiki>&</nowiki>''' Y</code>
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| <code>'''<nowiki>TCLOSURE</nowiki>'''(X) </code>
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| <code>('''intersection''' X Y)</code>
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| <code> -- </code>
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| <code>em.mkExpr('''kind::INTERSECTION''', X, Y);</code>
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| <code> -- </code>
 
|-
 
|-
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| Set subtraction
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| Join
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| <code>X '''<nowiki>–</nowiki>''' Y</code>
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| <code> X '''<nowiki>JOIN</nowiki>''' Y </code>
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| <code>('''setminus''' X Y)</code>
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| <code> -- </code>
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| <code>em.mkExpr('''kind::SETMINUS''', X, Y);</code>
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| <code> -- </code>
 
|-
 
|-
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| Membership
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| Product
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| <code>x '''<nowiki>IS_IN</nowiki>''' X</code>
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| <code> X '''<nowiki>PRODUCT</nowiki>''' Y </code>
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| <code>('''member''' x X)</code>
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| <code> -- </code>
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| <code>em.mkExpr('''kind::MEMBER''', x, X);</code>
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| <code> -- </code>
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|-
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| Subset
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−
| <code>X '''<nowiki><=</nowiki>''' Y</code>
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| <code>('''subset''' X Y)</code>
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| <code>em.mkExpr('''kind::SUBSET''', X, Y);</code>
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−
|-
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| Empty set
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| {} :: <Type Ascription>
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| (as emptyset <Type Ascription>)
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| CVC4::EmptySet(CVC4::SetType setType)
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−
|-
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−
|
+
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| <code>'''{}''' :: SET OF INT</code>
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−
| <code>(as '''emptyset''' (Set Int))</code>
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| <code>em.mkConst('''EmptySet'''(em.mkSetType(em.integerType())));</code>
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|-

Revision as of 14:59, 21 March 2017

As of July 2014 (CVC4 v1.4), we include support for theory of finite sets. The simplest way to get a sense of the syntax is to look at an example:


For reference, below is a short summary of the sorts, constants, functions and predicates.

CVC language SMTLIB language C++ API
Logic string Not needed append "FS" for finite sets append "FS" for finite sets
(set-logic QF_UFLIAFS) smt.setLogic("QF_UFLIAFS");
Sort SET OF <Element Sort> (Set <Element Sort>) CVC4::ExprManager::mkSetType(CVC4::Type elementType)
X: SET OF INT; (declare-fun X () (Set Int)) em.mkSetType( em.integerType() );
Union X | Y (union X Y) em.mkExpr(kind::UNION, X, Y);
Intersection X & Y (intersection X Y) em.mkExpr(kind::INTERSECTION, X, Y);
Set subtraction X – Y (setminus X Y) em.mkExpr(kind::SETMINUS, X, Y);
Membership x IS_IN X (member x X) em.mkExpr(kind::MEMBER, x, X);
Subset X <= Y (subset X Y) em.mkExpr(kind::SUBSET, X, Y);
Empty set {} :: <Type Ascription> (as emptyset <Type Ascription>) CVC4::EmptySet(CVC4::SetType setType)
{} :: SET OF INT (as emptyset (Set Int)) em.mkConst(EmptySet(em.mkSetType(em.integerType())));
Singleton set {1} (singleton 1) em.mkExpr(kind::SINGLETON, oneExpr);
Cardinality CARD( X ) (card X) em.mkExpr(kind::CARD, X);
Insert/finite sets {1, 2, 3, 4} (insert 1 2 3 (singleton 4)) em.mkExpr(kind::INSERT, c1, c2, c3, sgl4);
Complement ~ X (complement X) em.mkExpr(kind::COMPLEMENT, X);
Universe set UNIVERSE :: <Type Ascription> (as univset <Type Ascription>) mkUniqueVar(CVC4::SetType setType,kind::UNIVERSE_SET)
UNIVERSE :: SET OF INT (as univset (Set Int)) em.mkUniqueVar(em.mkSetType(em.integerType()),kind::UNIVERSE_SET);


Operator precedence for CVC language: & | – IS_IN <= =. For example, A - B | A & C <= D is read as ( A - ( B | (A & C) ) ) <= D.


Relations

CVC language SMTLIB language C++ API
Logic string Not needed append "FS" for finite sets append "FS" for finite sets
(set-logic QF_UFLIAFS) smt.setLogic("QF_UFLIAFS");
Sort SET OF [Element Sort] -- --
X: SET OF [INT, INT]; -- --
TRANSPOSE TRANSPOSE(X) -- --
Transitive Closure TCLOSURE(X) -- --
Join X JOIN Y -- --
Product X PRODUCT Y -- --
Retrieved from "http://cvc4.stanford.edu/w/index.php?title=Sets&oldid=5542"