public static void main(String[] args) throws Err {
// Chooses the Alloy4 options
A4Options opt = new A4Options();
opt.solver = A4Options.SatSolver.SAT4J;
// abstract sig A {}
PrimSig A = new PrimSig("A", Attr.ABSTRACT);
// sig B {}
PrimSig B = new PrimSig("B");
// one sig A1 extends A {}
PrimSig A1 = new PrimSig("A1", A, Attr.ONE);
// one sig A2 extends A {}
PrimSig A2 = new PrimSig("A2", A, Attr.ONE);
// A { f: B lone->lone B }
Expr f = A.addField("f", B.lone_arrow_lone(B));
// Since (B lone->lone B) is not unary, the default is "setOf", meaning "f:set (B lone->lone
// B)"
// A { g: B }
Expr g = A.addField("g", B);
// The line above is the same as: A.addField(null, "g", B.oneOf()) since B is unary.
// If you want "setOf", you need: A.addField(null, "g", B.setOf())
// pred someG { some g }
Func someG = new Func(null, "SomeG", null, null, g.some());
// pred atMostThree[x:univ, y:univ] { #(x+y) >= 3 }
Decl x = UNIV.oneOf("x");
Decl y = UNIV.oneOf("y");
Expr body = x.get().plus(y.get()).cardinality().lte(ExprConstant.makeNUMBER(3));
Func atMost3 = new Func(null, "atMost3", Util.asList(x, y), null, body);
List<Sig> sigs = Arrays.asList(new Sig[] {A, B, A1, A2});
// run { some A && atMostThree[B,B] } for 3 but 3 int, 3 seq
Expr expr1 = A.some().and(atMost3.call(B, B));
Command cmd1 = new Command(false, 3, 3, 3, expr1);
A4Solution sol1 = TranslateAlloyToKodkod.execute_command(NOP, sigs, cmd1, opt);
System.out.println("[Solution1]:");
System.out.println(sol1.toString());
// run { some f && SomeG[] } for 3 but 2 int, 1 seq, 5 A, exactly 6 B
Expr expr2 = f.some().and(someG.call());
Command cmd2 = new Command(false, 3, 2, 1, expr2);
cmd2 = cmd2.change(A, false, 5);
cmd2 = cmd2.change(B, true, 6);
A4Solution sol2 = TranslateAlloyToKodkod.execute_command(NOP, sigs, cmd2, opt);
System.out.println("[Solution2]:");
System.out.println(sol2.toString());
}
/**
* Constructs a new relation to Alloy translator. Translates a relation (top or non top) to Alloy
* in a given direction.
*
* @param relation the relation being translated
* @param top whether the relation is top or not
* @throws EchoError
*/
Relation2Alloy(
EAlloyTransformation transformation_translator,
Boolean top,
Relation2Alloy parent_translator,
EDependency dependency,
ERelation relation)
throws EchoError {
this.relation = relation;
this.dependency = dependency;
this.top = top;
this.transformation_translator = transformation_translator;
this.parent_translator = top ? this : parent_translator;
for (EModelParameter mdl : relation.getTransformation().getModels()) {
Decl d;
String metamodelID = mdl.getMetamodel().ID;
try {
d =
AlloyEchoTranslator.getInstance()
.getMetamodel(metamodelID)
.sig_metamodel
.oneOf(mdl.getName());
} catch (Err a) {
throw new ErrorAlloy(
ErrorAlloy.FAIL_CREATE_VAR,
"Failed to create transformation model variable: " + mdl.getName(),
a,
Task.TRANSLATE_TRANSFORMATION);
}
model_params_decls.add(d);
modelparam2var.put(mdl.getName(), d.get());
var2model.put(d.get().label, null);
var2var.put(d.get().label, d.get());
}
initVariableLists();
Field field = null;
if (!top) field = addRelationField();
Expr fact = calculateFact();
AlloyOptimizations opt = new AlloyOptimizations();
if (EchoOptionsSetup.getInstance().isOptimize() && true) {
fact = opt.trading(fact);
fact = opt.onePoint(fact);
}
EchoReporter.getInstance().debug("Post-opt: " + fact);
if (top) addRelationPred(fact);
else addRelationDef(fact, field);
}