// returns a BlockStmt containing a list of assertions
// Assertions are based on invariants and use the same
// nodes as nodes basedOn
public static Stmt getInvariantAssertions(WhileStmt whileStmt) {
List<Stmt> assertionList = new LinkedList<Stmt>();
for (Expr e : whileStmt.getInvariantList().getExprs()) {
assertionList.add(new AssertStmt(e, e));
}
return new BlockStmt(assertionList);
}
// Returns an Expr that's a conjunction of the invariant list
// If the list is empty return truth representation (1)
public static AssumeStmt getInvariantAssume(WhileStmt whileStmt) {
Expr baseExpr = new IntLiteral(1);
for (Expr e : whileStmt.getInvariantList().getExprs()) {
baseExpr = new BinaryExpr(BinaryExpr.LAND, e, baseExpr);
}
return new AssumeStmt(baseExpr);
}