(VAR X Y Z I P X1 X2) (RULES active(__(__(X,Y),Z)) -> mark(__(X,__(Y,Z))) active(__(X,nil)) -> mark(X) active(__(nil,X)) -> mark(X) active(and(tt,X)) -> mark(X) active(isNePal(__(I,__(P,I)))) -> mark(tt) mark(__(X1,X2)) -> active(__(mark(X1),mark(X2))) mark(nil) -> active(nil) mark(and(X1,X2)) -> active(and(mark(X1),X2)) mark(tt) -> active(tt) mark(isNePal(X)) -> active(isNePal(mark(X))) __(mark(X1),X2) -> __(X1,X2) __(X1,mark(X2)) -> __(X1,X2) __(active(X1),X2) -> __(X1,X2) __(X1,active(X2)) -> __(X1,X2) and(mark(X1),X2) -> and(X1,X2) and(X1,mark(X2)) -> and(X1,X2) and(active(X1),X2) -> and(X1,X2) and(X1,active(X2)) -> and(X1,X2) isNePal(mark(X)) -> isNePal(X) isNePal(active(X)) -> isNePal(X) ) (STRATEGY INNERMOST)