/**
* Translates the equalities of the given symbolic constraint into SMTLib format. Ignores the
* substitution of the symbolic constraint.
*/
@Override
public ASTNode transform(SymbolicConstraint constraint) {
if (constraint.data.equalities.isEmpty()) {
return new SMTLibTerm("true");
}
StringBuilder sb = new StringBuilder();
sb.append("(and");
boolean isEmptyAdd = true;
for (SymbolicConstraint.Equality equality : constraint.data.equalities) {
try {
String left = ((SMTLibTerm) equality.leftHandSide().accept(this)).expression();
String right = ((SMTLibTerm) equality.rightHandSide().accept(this)).expression();
sb.append(" (= ");
sb.append(left);
sb.append(" ");
sb.append(right);
sb.append(")");
isEmptyAdd = false;
} catch (UnsupportedOperationException e) {
// TODO(AndreiS): fix this translation and the exceptions
if (skipEqualities) {
/* it is sound to skip the equalities that cannot be translated */
e.printStackTrace();
} else {
throw e;
}
}
}
if (isEmptyAdd) {
sb.append(" true");
}
sb.append(")");
return new SMTLibTerm(sb.toString());
}
@Override
public void visit(SymbolicConstraint node) {
for (Map.Entry<Variable, Term> entry : node.substitution().entrySet()) {
entry.getKey().accept(this);
entry.getValue().accept(this);
}
for (SymbolicConstraint.Equality equality : node.equalities()) {
equality.leftHandSide().accept(this);
equality.rightHandSide().accept(this);
}
}
