The rewrite relation of the following TRS is considered.
active(U11(tt,N)) | → | mark(N) | (1) |
active(U21(tt,M,N)) | → | mark(s(plus(N,M))) | (2) |
active(U31(tt)) | → | mark(0) | (3) |
active(U41(tt,M,N)) | → | mark(plus(x(N,M),N)) | (4) |
active(and(tt,X)) | → | mark(X) | (5) |
active(isNat(0)) | → | mark(tt) | (6) |
active(isNat(plus(V1,V2))) | → | mark(and(isNat(V1),isNat(V2))) | (7) |
active(isNat(s(V1))) | → | mark(isNat(V1)) | (8) |
active(isNat(x(V1,V2))) | → | mark(and(isNat(V1),isNat(V2))) | (9) |
active(plus(N,0)) | → | mark(U11(isNat(N),N)) | (10) |
active(plus(N,s(M))) | → | mark(U21(and(isNat(M),isNat(N)),M,N)) | (11) |
active(x(N,0)) | → | mark(U31(isNat(N))) | (12) |
active(x(N,s(M))) | → | mark(U41(and(isNat(M),isNat(N)),M,N)) | (13) |
mark(U11(X1,X2)) | → | active(U11(mark(X1),X2)) | (14) |
mark(tt) | → | active(tt) | (15) |
mark(U21(X1,X2,X3)) | → | active(U21(mark(X1),X2,X3)) | (16) |
mark(s(X)) | → | active(s(mark(X))) | (17) |
mark(plus(X1,X2)) | → | active(plus(mark(X1),mark(X2))) | (18) |
mark(U31(X)) | → | active(U31(mark(X))) | (19) |
mark(0) | → | active(0) | (20) |
mark(U41(X1,X2,X3)) | → | active(U41(mark(X1),X2,X3)) | (21) |
mark(x(X1,X2)) | → | active(x(mark(X1),mark(X2))) | (22) |
mark(and(X1,X2)) | → | active(and(mark(X1),X2)) | (23) |
mark(isNat(X)) | → | active(isNat(X)) | (24) |
U11(mark(X1),X2) | → | U11(X1,X2) | (25) |
U11(X1,mark(X2)) | → | U11(X1,X2) | (26) |
U11(active(X1),X2) | → | U11(X1,X2) | (27) |
U11(X1,active(X2)) | → | U11(X1,X2) | (28) |
U21(mark(X1),X2,X3) | → | U21(X1,X2,X3) | (29) |
U21(X1,mark(X2),X3) | → | U21(X1,X2,X3) | (30) |
U21(X1,X2,mark(X3)) | → | U21(X1,X2,X3) | (31) |
U21(active(X1),X2,X3) | → | U21(X1,X2,X3) | (32) |
U21(X1,active(X2),X3) | → | U21(X1,X2,X3) | (33) |
U21(X1,X2,active(X3)) | → | U21(X1,X2,X3) | (34) |
s(mark(X)) | → | s(X) | (35) |
s(active(X)) | → | s(X) | (36) |
plus(mark(X1),X2) | → | plus(X1,X2) | (37) |
plus(X1,mark(X2)) | → | plus(X1,X2) | (38) |
plus(active(X1),X2) | → | plus(X1,X2) | (39) |
plus(X1,active(X2)) | → | plus(X1,X2) | (40) |
U31(mark(X)) | → | U31(X) | (41) |
U31(active(X)) | → | U31(X) | (42) |
U41(mark(X1),X2,X3) | → | U41(X1,X2,X3) | (43) |
U41(X1,mark(X2),X3) | → | U41(X1,X2,X3) | (44) |
U41(X1,X2,mark(X3)) | → | U41(X1,X2,X3) | (45) |
U41(active(X1),X2,X3) | → | U41(X1,X2,X3) | (46) |
U41(X1,active(X2),X3) | → | U41(X1,X2,X3) | (47) |
U41(X1,X2,active(X3)) | → | U41(X1,X2,X3) | (48) |
x(mark(X1),X2) | → | x(X1,X2) | (49) |
x(X1,mark(X2)) | → | x(X1,X2) | (50) |
x(active(X1),X2) | → | x(X1,X2) | (51) |
x(X1,active(X2)) | → | x(X1,X2) | (52) |
and(mark(X1),X2) | → | and(X1,X2) | (53) |
and(X1,mark(X2)) | → | and(X1,X2) | (54) |
and(active(X1),X2) | → | and(X1,X2) | (55) |
and(X1,active(X2)) | → | and(X1,X2) | (56) |
isNat(mark(X)) | → | isNat(X) | (57) |
isNat(active(X)) | → | isNat(X) | (58) |
prec(U11) | = | 0 | stat(U11) | = | mul | |
prec(tt) | = | 1 | stat(tt) | = | mul | |
prec(U21) | = | 4 | stat(U21) | = | lex | |
prec(s) | = | 3 | stat(s) | = | mul | |
prec(plus) | = | 4 | stat(plus) | = | lex | |
prec(U31) | = | 6 | stat(U31) | = | mul | |
prec(0) | = | 5 | stat(0) | = | mul | |
prec(U41) | = | 7 | stat(U41) | = | lex | |
prec(x) | = | 7 | stat(x) | = | lex | |
prec(and) | = | 2 | stat(and) | = | mul |
π(active) | = | 1 |
π(U11) | = | [1,2] |
π(tt) | = | [] |
π(mark) | = | 1 |
π(U21) | = | [3,2,1] |
π(s) | = | [1] |
π(plus) | = | [1,2] |
π(U31) | = | [1] |
π(0) | = | [] |
π(U41) | = | [2,3,1] |
π(x) | = | [2,1] |
π(and) | = | [1,2] |
π(isNat) | = | 1 |
active(U11(tt,N)) | → | mark(N) | (1) |
active(U21(tt,M,N)) | → | mark(s(plus(N,M))) | (2) |
active(U31(tt)) | → | mark(0) | (3) |
active(U41(tt,M,N)) | → | mark(plus(x(N,M),N)) | (4) |
active(and(tt,X)) | → | mark(X) | (5) |
active(isNat(0)) | → | mark(tt) | (6) |
active(isNat(plus(V1,V2))) | → | mark(and(isNat(V1),isNat(V2))) | (7) |
active(isNat(s(V1))) | → | mark(isNat(V1)) | (8) |
active(isNat(x(V1,V2))) | → | mark(and(isNat(V1),isNat(V2))) | (9) |
active(plus(N,0)) | → | mark(U11(isNat(N),N)) | (10) |
active(plus(N,s(M))) | → | mark(U21(and(isNat(M),isNat(N)),M,N)) | (11) |
active(x(N,0)) | → | mark(U31(isNat(N))) | (12) |
active(x(N,s(M))) | → | mark(U41(and(isNat(M),isNat(N)),M,N)) | (13) |
[mark(x1)] | = | 1 + 2 · x1 |
[U11(x1, x2)] | = | 1 + 1 · x1 + 1 · x2 |
[active(x1)] | = | 1 · x1 |
[tt] | = | 2 |
[U21(x1, x2, x3)] | = | 1 · x1 + 1 · x2 + 2 · x3 |
[s(x1)] | = | 1 · x1 |
[plus(x1, x2)] | = | 2 + 2 · x1 + 1 · x2 |
[U31(x1)] | = | 1 · x1 |
[0] | = | 1 |
[U41(x1, x2, x3)] | = | 1 + 1 · x1 + 1 · x2 + 2 · x3 |
[x(x1, x2)] | = | 2 + 2 · x1 + 1 · x2 |
[and(x1, x2)] | = | 1 · x1 + 1 · x2 |
[isNat(x1)] | = | 2 + 1 · x1 |
mark(U11(X1,X2)) | → | active(U11(mark(X1),X2)) | (14) |
mark(tt) | → | active(tt) | (15) |
mark(0) | → | active(0) | (20) |
mark(U41(X1,X2,X3)) | → | active(U41(mark(X1),X2,X3)) | (21) |
mark(isNat(X)) | → | active(isNat(X)) | (24) |
U11(mark(X1),X2) | → | U11(X1,X2) | (25) |
U11(X1,mark(X2)) | → | U11(X1,X2) | (26) |
U21(mark(X1),X2,X3) | → | U21(X1,X2,X3) | (29) |
U21(X1,mark(X2),X3) | → | U21(X1,X2,X3) | (30) |
U21(X1,X2,mark(X3)) | → | U21(X1,X2,X3) | (31) |
s(mark(X)) | → | s(X) | (35) |
plus(mark(X1),X2) | → | plus(X1,X2) | (37) |
plus(X1,mark(X2)) | → | plus(X1,X2) | (38) |
U31(mark(X)) | → | U31(X) | (41) |
U41(mark(X1),X2,X3) | → | U41(X1,X2,X3) | (43) |
U41(X1,mark(X2),X3) | → | U41(X1,X2,X3) | (44) |
U41(X1,X2,mark(X3)) | → | U41(X1,X2,X3) | (45) |
x(mark(X1),X2) | → | x(X1,X2) | (49) |
x(X1,mark(X2)) | → | x(X1,X2) | (50) |
and(mark(X1),X2) | → | and(X1,X2) | (53) |
and(X1,mark(X2)) | → | and(X1,X2) | (54) |
isNat(mark(X)) | → | isNat(X) | (57) |
[mark(x1)] | = | 2 + 2 · x1 |
[U21(x1, x2, x3)] | = | 2 + 2 · x1 + 1 · x2 + 1 · x3 |
[active(x1)] | = | 1 · x1 |
[s(x1)] | = | 2 + 1 · x1 |
[plus(x1, x2)] | = | 2 + 1 · x1 + 1 · x2 |
[U31(x1)] | = | 1 · x1 |
[x(x1, x2)] | = | 2 + 1 · x1 + 1 · x2 |
[and(x1, x2)] | = | 1 + 1 · x1 + 1 · x2 |
[U11(x1, x2)] | = | 2 · x1 + 2 · x2 |
[U41(x1, x2, x3)] | = | 1 · x1 + 2 · x2 + 2 · x3 |
[isNat(x1)] | = | 2 · x1 |
mark(s(X)) | → | active(s(mark(X))) | (17) |
mark(and(X1,X2)) | → | active(and(mark(X1),X2)) | (23) |
[mark(x1)] | = | 1 + 2 · x1 |
[U21(x1, x2, x3)] | = | 1 + 1 · x1 + 1 · x2 + 1 · x3 |
[active(x1)] | = | 1 · x1 |
[plus(x1, x2)] | = | 2 + 1 · x1 + 1 · x2 |
[U31(x1)] | = | 1 + 1 · x1 |
[x(x1, x2)] | = | 2 + 1 · x1 + 1 · x2 |
[U11(x1, x2)] | = | 1 · x1 + 1 · x2 |
[s(x1)] | = | 2 · x1 |
[U41(x1, x2, x3)] | = | 2 · x1 + 2 · x2 + 2 · x3 |
[and(x1, x2)] | = | 1 · x1 + 1 · x2 |
[isNat(x1)] | = | 2 · x1 |
mark(U21(X1,X2,X3)) | → | active(U21(mark(X1),X2,X3)) | (16) |
mark(plus(X1,X2)) | → | active(plus(mark(X1),mark(X2))) | (18) |
mark(U31(X)) | → | active(U31(mark(X))) | (19) |
mark(x(X1,X2)) | → | active(x(mark(X1),mark(X2))) | (22) |
prec(active) | = | 9 | weight(active) | = | 0 | ||||
prec(s) | = | 2 | weight(s) | = | 1 | ||||
prec(U31) | = | 4 | weight(U31) | = | 1 | ||||
prec(isNat) | = | 8 | weight(isNat) | = | 1 | ||||
prec(U11) | = | 0 | weight(U11) | = | 0 | ||||
prec(U21) | = | 1 | weight(U21) | = | 0 | ||||
prec(plus) | = | 3 | weight(plus) | = | 0 | ||||
prec(U41) | = | 5 | weight(U41) | = | 0 | ||||
prec(x) | = | 6 | weight(x) | = | 0 | ||||
prec(and) | = | 7 | weight(and) | = | 0 |
U11(active(X1),X2) | → | U11(X1,X2) | (27) |
U11(X1,active(X2)) | → | U11(X1,X2) | (28) |
U21(active(X1),X2,X3) | → | U21(X1,X2,X3) | (32) |
U21(X1,active(X2),X3) | → | U21(X1,X2,X3) | (33) |
U21(X1,X2,active(X3)) | → | U21(X1,X2,X3) | (34) |
s(active(X)) | → | s(X) | (36) |
plus(active(X1),X2) | → | plus(X1,X2) | (39) |
plus(X1,active(X2)) | → | plus(X1,X2) | (40) |
U31(active(X)) | → | U31(X) | (42) |
U41(active(X1),X2,X3) | → | U41(X1,X2,X3) | (46) |
U41(X1,active(X2),X3) | → | U41(X1,X2,X3) | (47) |
U41(X1,X2,active(X3)) | → | U41(X1,X2,X3) | (48) |
x(active(X1),X2) | → | x(X1,X2) | (51) |
x(X1,active(X2)) | → | x(X1,X2) | (52) |
and(active(X1),X2) | → | and(X1,X2) | (55) |
and(X1,active(X2)) | → | and(X1,X2) | (56) |
isNat(active(X)) | → | isNat(X) | (58) |
There are no rules in the TRS. Hence, it is terminating.