MAYBE MAYBE TRS: { if(true(), x, y) -> x, if(false(), x, y) -> y, and(x, false()) -> false(), and(true(), true()) -> true(), f(s(x)) -> h(x), f(0()) -> true(), t(x) -> p(x, x), g(s(x), s(y)) -> if( and(f(s(x)), f(s(y))), t(g(k(minus(m(x, y), n(x, y)), s(s(0()))), k(n(s(x), s(y)), s(s(0()))))), g(minus(m(x, y), n(x, y)), n(s(x), s(y))) ), k(s(x), s(y)) -> s(k(minus(x, y), s(y))), k(0(), s(y)) -> 0(), minus(x, 0()) -> x, minus(s(x), s(y)) -> minus(x, y), m(x, 0()) -> x, m(s(x), s(y)) -> s(m(x, y)), m(0(), y) -> y, n(x, 0()) -> 0(), n(s(x), s(y)) -> s(n(x, y)), n(0(), y) -> 0(), p(s(x), x) -> p(if(gt(x, x), id(x), id(x)), s(x)), p(s(x), s(y)) -> s(s(p(if(gt(x, y), x, y), if(not(gt(x, y)), id(x), id(y))))), p(0(), y) -> y, p(id(x), s(y)) -> s(p(x, if(gt(s(y), y), y, s(y)))), gt(s(x), s(y)) -> gt(x, y), gt(s(x), 0()) -> true(), gt(0(), y) -> false(), not(x) -> if(x, false(), true()), id(x) -> x, h(s(x)) -> f(x), h(0()) -> false() } DUP: We consider a duplicating system. Trs: { if(true(), x, y) -> x, if(false(), x, y) -> y, and(x, false()) -> false(), and(true(), true()) -> true(), f(s(x)) -> h(x), f(0()) -> true(), t(x) -> p(x, x), g(s(x), s(y)) -> if( and(f(s(x)), f(s(y))), t(g(k(minus(m(x, y), n(x, y)), s(s(0()))), k(n(s(x), s(y)), s(s(0())))) ), g(minus(m(x, y), n(x, y)), n(s(x), s(y))) ), k(s(x), s(y)) -> s(k(minus(x, y), s(y))), k(0(), s(y)) -> 0(), minus(x, 0()) -> x, minus(s(x), s(y)) -> minus(x, y), m(x, 0()) -> x, m(s(x), s(y)) -> s(m(x, y)), m(0(), y) -> y, n(x, 0()) -> 0(), n(s(x), s(y)) -> s(n(x, y)), n(0(), y) -> 0(), p(s(x), x) -> p(if(gt(x, x), id(x), id(x)), s(x)), p(s(x), s(y)) -> s(s(p(if(gt(x, y), x, y), if(not(gt(x, y)), id(x), id(y))))), p(0(), y) -> y, p(id(x), s(y)) -> s(p(x, if(gt(s(y), y), y, s(y)))), gt(s(x), s(y)) -> gt(x, y), gt(s(x), 0()) -> true(), gt(0(), y) -> false(), not(x) -> if(x, false(), true()), id(x) -> x, h(s(x)) -> f(x), h(0()) -> false() } Fail