YES We show the termination of the TRS R: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) a____(X,nil()) -> mark(X) a____(nil(),X) -> mark(X) a__and(tt(),X) -> mark(X) a__isList(V) -> a__isNeList(V) a__isList(nil()) -> tt() a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) a__isNeList(V) -> a__isQid(V) a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) a__isNePal(V) -> a__isQid(V) a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) a__isPal(V) -> a__isNePal(V) a__isPal(nil()) -> tt() a__isQid(a()) -> tt() a__isQid(e()) -> tt() a__isQid(i()) -> tt() a__isQid(o()) -> tt() a__isQid(u()) -> tt() mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) mark(and(X1,X2)) -> a__and(mark(X1),X2) mark(isList(X)) -> a__isList(X) mark(isNeList(X)) -> a__isNeList(X) mark(isQid(X)) -> a__isQid(X) mark(isNePal(X)) -> a__isNePal(X) mark(isPal(X)) -> a__isPal(X) mark(nil()) -> nil() mark(tt()) -> tt() mark(a()) -> a() mark(e()) -> e() mark(i()) -> i() mark(o()) -> o() mark(u()) -> u() a____(X1,X2) -> __(X1,X2) a__and(X1,X2) -> and(X1,X2) a__isList(X) -> isList(X) a__isNeList(X) -> isNeList(X) a__isQid(X) -> isQid(X) a__isNePal(X) -> isNePal(X) a__isPal(X) -> isPal(X) -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: a____#(__(X,Y),Z) -> a____#(mark(X),a____(mark(Y),mark(Z))) p2: a____#(__(X,Y),Z) -> mark#(X) p3: a____#(__(X,Y),Z) -> a____#(mark(Y),mark(Z)) p4: a____#(__(X,Y),Z) -> mark#(Y) p5: a____#(__(X,Y),Z) -> mark#(Z) p6: a____#(X,nil()) -> mark#(X) p7: a____#(nil(),X) -> mark#(X) p8: a__and#(tt(),X) -> mark#(X) p9: a__isList#(V) -> a__isNeList#(V) p10: a__isList#(__(V1,V2)) -> a__and#(a__isList(V1),isList(V2)) p11: a__isList#(__(V1,V2)) -> a__isList#(V1) p12: a__isNeList#(V) -> a__isQid#(V) p13: a__isNeList#(__(V1,V2)) -> a__and#(a__isList(V1),isNeList(V2)) p14: a__isNeList#(__(V1,V2)) -> a__isList#(V1) p15: a__isNeList#(__(V1,V2)) -> a__and#(a__isNeList(V1),isList(V2)) p16: a__isNeList#(__(V1,V2)) -> a__isNeList#(V1) p17: a__isNePal#(V) -> a__isQid#(V) p18: a__isNePal#(__(I,__(P,I))) -> a__and#(a__isQid(I),isPal(P)) p19: a__isNePal#(__(I,__(P,I))) -> a__isQid#(I) p20: a__isPal#(V) -> a__isNePal#(V) p21: mark#(__(X1,X2)) -> a____#(mark(X1),mark(X2)) p22: mark#(__(X1,X2)) -> mark#(X1) p23: mark#(__(X1,X2)) -> mark#(X2) p24: mark#(and(X1,X2)) -> a__and#(mark(X1),X2) p25: mark#(and(X1,X2)) -> mark#(X1) p26: mark#(isList(X)) -> a__isList#(X) p27: mark#(isNeList(X)) -> a__isNeList#(X) p28: mark#(isQid(X)) -> a__isQid#(X) p29: mark#(isNePal(X)) -> a__isNePal#(X) p30: mark#(isPal(X)) -> a__isPal#(X) and R consists of: r1: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) r2: a____(X,nil()) -> mark(X) r3: a____(nil(),X) -> mark(X) r4: a__and(tt(),X) -> mark(X) r5: a__isList(V) -> a__isNeList(V) r6: a__isList(nil()) -> tt() r7: a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) r8: a__isNeList(V) -> a__isQid(V) r9: a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) r10: a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) r11: a__isNePal(V) -> a__isQid(V) r12: a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) r13: a__isPal(V) -> a__isNePal(V) r14: a__isPal(nil()) -> tt() r15: a__isQid(a()) -> tt() r16: a__isQid(e()) -> tt() r17: a__isQid(i()) -> tt() r18: a__isQid(o()) -> tt() r19: a__isQid(u()) -> tt() r20: mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) r21: mark(and(X1,X2)) -> a__and(mark(X1),X2) r22: mark(isList(X)) -> a__isList(X) r23: mark(isNeList(X)) -> a__isNeList(X) r24: mark(isQid(X)) -> a__isQid(X) r25: mark(isNePal(X)) -> a__isNePal(X) r26: mark(isPal(X)) -> a__isPal(X) r27: mark(nil()) -> nil() r28: mark(tt()) -> tt() r29: mark(a()) -> a() r30: mark(e()) -> e() r31: mark(i()) -> i() r32: mark(o()) -> o() r33: mark(u()) -> u() r34: a____(X1,X2) -> __(X1,X2) r35: a__and(X1,X2) -> and(X1,X2) r36: a__isList(X) -> isList(X) r37: a__isNeList(X) -> isNeList(X) r38: a__isQid(X) -> isQid(X) r39: a__isNePal(X) -> isNePal(X) r40: a__isPal(X) -> isPal(X) The estimated dependency graph contains the following SCCs: {p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p13, p14, p15, p16, p18, p20, p21, p22, p23, p24, p25, p26, p27, p29, p30} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: a____#(__(X,Y),Z) -> a____#(mark(X),a____(mark(Y),mark(Z))) p2: a____#(nil(),X) -> mark#(X) p3: mark#(isPal(X)) -> a__isPal#(X) p4: a__isPal#(V) -> a__isNePal#(V) p5: a__isNePal#(__(I,__(P,I))) -> a__and#(a__isQid(I),isPal(P)) p6: a__and#(tt(),X) -> mark#(X) p7: mark#(isNePal(X)) -> a__isNePal#(X) p8: mark#(isNeList(X)) -> a__isNeList#(X) p9: a__isNeList#(__(V1,V2)) -> a__isNeList#(V1) p10: a__isNeList#(__(V1,V2)) -> a__and#(a__isNeList(V1),isList(V2)) p11: a__isNeList#(__(V1,V2)) -> a__isList#(V1) p12: a__isList#(__(V1,V2)) -> a__isList#(V1) p13: a__isList#(__(V1,V2)) -> a__and#(a__isList(V1),isList(V2)) p14: a__isList#(V) -> a__isNeList#(V) p15: a__isNeList#(__(V1,V2)) -> a__and#(a__isList(V1),isNeList(V2)) p16: mark#(isList(X)) -> a__isList#(X) p17: mark#(and(X1,X2)) -> mark#(X1) p18: mark#(and(X1,X2)) -> a__and#(mark(X1),X2) p19: mark#(__(X1,X2)) -> mark#(X2) p20: mark#(__(X1,X2)) -> mark#(X1) p21: mark#(__(X1,X2)) -> a____#(mark(X1),mark(X2)) p22: a____#(X,nil()) -> mark#(X) p23: a____#(__(X,Y),Z) -> mark#(Z) p24: a____#(__(X,Y),Z) -> mark#(Y) p25: a____#(__(X,Y),Z) -> a____#(mark(Y),mark(Z)) p26: a____#(__(X,Y),Z) -> mark#(X) and R consists of: r1: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) r2: a____(X,nil()) -> mark(X) r3: a____(nil(),X) -> mark(X) r4: a__and(tt(),X) -> mark(X) r5: a__isList(V) -> a__isNeList(V) r6: a__isList(nil()) -> tt() r7: a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) r8: a__isNeList(V) -> a__isQid(V) r9: a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) r10: a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) r11: a__isNePal(V) -> a__isQid(V) r12: a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) r13: a__isPal(V) -> a__isNePal(V) r14: a__isPal(nil()) -> tt() r15: a__isQid(a()) -> tt() r16: a__isQid(e()) -> tt() r17: a__isQid(i()) -> tt() r18: a__isQid(o()) -> tt() r19: a__isQid(u()) -> tt() r20: mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) r21: mark(and(X1,X2)) -> a__and(mark(X1),X2) r22: mark(isList(X)) -> a__isList(X) r23: mark(isNeList(X)) -> a__isNeList(X) r24: mark(isQid(X)) -> a__isQid(X) r25: mark(isNePal(X)) -> a__isNePal(X) r26: mark(isPal(X)) -> a__isPal(X) r27: mark(nil()) -> nil() r28: mark(tt()) -> tt() r29: mark(a()) -> a() r30: mark(e()) -> e() r31: mark(i()) -> i() r32: mark(o()) -> o() r33: mark(u()) -> u() r34: a____(X1,X2) -> __(X1,X2) r35: a__and(X1,X2) -> and(X1,X2) r36: a__isList(X) -> isList(X) r37: a__isNeList(X) -> isNeList(X) r38: a__isQid(X) -> isQid(X) r39: a__isNePal(X) -> isNePal(X) r40: a__isPal(X) -> isPal(X) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29, r30, r31, r32, r33, r34, r35, r36, r37, r38, r39, r40 Take the reduction pair: matrix interpretations: carrier: N^2 order: standard order interpretations: a____#_A(x1,x2) = ((0,1),(0,0)) x1 + ((0,1),(0,0)) x2 ___A(x1,x2) = ((0,1),(0,1)) x1 + x2 + (1,0) mark_A(x1) = ((0,1),(0,1)) x1 + (1,0) a_____A(x1,x2) = ((0,1),(0,1)) x1 + ((0,1),(0,1)) x2 + (1,0) nil_A() = (1,1) mark#_A(x1) = ((0,1),(0,0)) x1 isPal_A(x1) = (0,0) a__isPal#_A(x1) = (0,0) a__isNePal#_A(x1) = (0,0) a__and#_A(x1,x2) = ((0,1),(0,0)) x2 a__isQid_A(x1) = (1,0) tt_A() = (1,0) isNePal_A(x1) = (0,0) isNeList_A(x1) = (1,0) a__isNeList#_A(x1) = (0,0) a__isNeList_A(x1) = (1,0) isList_A(x1) = (0,0) a__isList#_A(x1) = (0,0) a__isList_A(x1) = (1,0) and_A(x1,x2) = x1 + x2 a__and_A(x1,x2) = x1 + ((0,1),(0,1)) x2 a__isNePal_A(x1) = (1,0) a__isPal_A(x1) = (1,0) a_A() = (0,0) e_A() = (0,0) i_A() = (0,0) o_A() = (0,0) u_A() = (0,0) isQid_A(x1) = (0,0) The next rules are strictly ordered: p2, p22 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: a____#(__(X,Y),Z) -> a____#(mark(X),a____(mark(Y),mark(Z))) p2: mark#(isPal(X)) -> a__isPal#(X) p3: a__isPal#(V) -> a__isNePal#(V) p4: a__isNePal#(__(I,__(P,I))) -> a__and#(a__isQid(I),isPal(P)) p5: a__and#(tt(),X) -> mark#(X) p6: mark#(isNePal(X)) -> a__isNePal#(X) p7: mark#(isNeList(X)) -> a__isNeList#(X) p8: a__isNeList#(__(V1,V2)) -> a__isNeList#(V1) p9: a__isNeList#(__(V1,V2)) -> a__and#(a__isNeList(V1),isList(V2)) p10: a__isNeList#(__(V1,V2)) -> a__isList#(V1) p11: a__isList#(__(V1,V2)) -> a__isList#(V1) p12: a__isList#(__(V1,V2)) -> a__and#(a__isList(V1),isList(V2)) p13: a__isList#(V) -> a__isNeList#(V) p14: a__isNeList#(__(V1,V2)) -> a__and#(a__isList(V1),isNeList(V2)) p15: mark#(isList(X)) -> a__isList#(X) p16: mark#(and(X1,X2)) -> mark#(X1) p17: mark#(and(X1,X2)) -> a__and#(mark(X1),X2) p18: mark#(__(X1,X2)) -> mark#(X2) p19: mark#(__(X1,X2)) -> mark#(X1) p20: mark#(__(X1,X2)) -> a____#(mark(X1),mark(X2)) p21: a____#(__(X,Y),Z) -> mark#(Z) p22: a____#(__(X,Y),Z) -> mark#(Y) p23: a____#(__(X,Y),Z) -> a____#(mark(Y),mark(Z)) p24: a____#(__(X,Y),Z) -> mark#(X) and R consists of: r1: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) r2: a____(X,nil()) -> mark(X) r3: a____(nil(),X) -> mark(X) r4: a__and(tt(),X) -> mark(X) r5: a__isList(V) -> a__isNeList(V) r6: a__isList(nil()) -> tt() r7: a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) r8: a__isNeList(V) -> a__isQid(V) r9: a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) r10: a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) r11: a__isNePal(V) -> a__isQid(V) r12: a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) r13: a__isPal(V) -> a__isNePal(V) r14: a__isPal(nil()) -> tt() r15: a__isQid(a()) -> tt() r16: a__isQid(e()) -> tt() r17: a__isQid(i()) -> tt() r18: a__isQid(o()) -> tt() r19: a__isQid(u()) -> tt() r20: mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) r21: mark(and(X1,X2)) -> a__and(mark(X1),X2) r22: mark(isList(X)) -> a__isList(X) r23: mark(isNeList(X)) -> a__isNeList(X) r24: mark(isQid(X)) -> a__isQid(X) r25: mark(isNePal(X)) -> a__isNePal(X) r26: mark(isPal(X)) -> a__isPal(X) r27: mark(nil()) -> nil() r28: mark(tt()) -> tt() r29: mark(a()) -> a() r30: mark(e()) -> e() r31: mark(i()) -> i() r32: mark(o()) -> o() r33: mark(u()) -> u() r34: a____(X1,X2) -> __(X1,X2) r35: a__and(X1,X2) -> and(X1,X2) r36: a__isList(X) -> isList(X) r37: a__isNeList(X) -> isNeList(X) r38: a__isQid(X) -> isQid(X) r39: a__isNePal(X) -> isNePal(X) r40: a__isPal(X) -> isPal(X) The estimated dependency graph contains the following SCCs: {p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: a____#(__(X,Y),Z) -> a____#(mark(X),a____(mark(Y),mark(Z))) p2: a____#(__(X,Y),Z) -> mark#(X) p3: mark#(__(X1,X2)) -> a____#(mark(X1),mark(X2)) p4: a____#(__(X,Y),Z) -> a____#(mark(Y),mark(Z)) p5: a____#(__(X,Y),Z) -> mark#(Y) p6: mark#(__(X1,X2)) -> mark#(X1) p7: mark#(__(X1,X2)) -> mark#(X2) p8: mark#(and(X1,X2)) -> a__and#(mark(X1),X2) p9: a__and#(tt(),X) -> mark#(X) p10: mark#(and(X1,X2)) -> mark#(X1) p11: mark#(isList(X)) -> a__isList#(X) p12: a__isList#(V) -> a__isNeList#(V) p13: a__isNeList#(__(V1,V2)) -> a__and#(a__isList(V1),isNeList(V2)) p14: a__isNeList#(__(V1,V2)) -> a__isList#(V1) p15: a__isList#(__(V1,V2)) -> a__and#(a__isList(V1),isList(V2)) p16: a__isList#(__(V1,V2)) -> a__isList#(V1) p17: a__isNeList#(__(V1,V2)) -> a__and#(a__isNeList(V1),isList(V2)) p18: a__isNeList#(__(V1,V2)) -> a__isNeList#(V1) p19: mark#(isNeList(X)) -> a__isNeList#(X) p20: mark#(isNePal(X)) -> a__isNePal#(X) p21: a__isNePal#(__(I,__(P,I))) -> a__and#(a__isQid(I),isPal(P)) p22: mark#(isPal(X)) -> a__isPal#(X) p23: a__isPal#(V) -> a__isNePal#(V) p24: a____#(__(X,Y),Z) -> mark#(Z) and R consists of: r1: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) r2: a____(X,nil()) -> mark(X) r3: a____(nil(),X) -> mark(X) r4: a__and(tt(),X) -> mark(X) r5: a__isList(V) -> a__isNeList(V) r6: a__isList(nil()) -> tt() r7: a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) r8: a__isNeList(V) -> a__isQid(V) r9: a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) r10: a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) r11: a__isNePal(V) -> a__isQid(V) r12: a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) r13: a__isPal(V) -> a__isNePal(V) r14: a__isPal(nil()) -> tt() r15: a__isQid(a()) -> tt() r16: a__isQid(e()) -> tt() r17: a__isQid(i()) -> tt() r18: a__isQid(o()) -> tt() r19: a__isQid(u()) -> tt() r20: mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) r21: mark(and(X1,X2)) -> a__and(mark(X1),X2) r22: mark(isList(X)) -> a__isList(X) r23: mark(isNeList(X)) -> a__isNeList(X) r24: mark(isQid(X)) -> a__isQid(X) r25: mark(isNePal(X)) -> a__isNePal(X) r26: mark(isPal(X)) -> a__isPal(X) r27: mark(nil()) -> nil() r28: mark(tt()) -> tt() r29: mark(a()) -> a() r30: mark(e()) -> e() r31: mark(i()) -> i() r32: mark(o()) -> o() r33: mark(u()) -> u() r34: a____(X1,X2) -> __(X1,X2) r35: a__and(X1,X2) -> and(X1,X2) r36: a__isList(X) -> isList(X) r37: a__isNeList(X) -> isNeList(X) r38: a__isQid(X) -> isQid(X) r39: a__isNePal(X) -> isNePal(X) r40: a__isPal(X) -> isPal(X) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29, r30, r31, r32, r33, r34, r35, r36, r37, r38, r39, r40 Take the reduction pair: matrix interpretations: carrier: N^2 order: standard order interpretations: a____#_A(x1,x2) = x1 + ((1,1),(0,0)) x2 + (5,0) ___A(x1,x2) = ((1,1),(0,0)) x1 + ((1,1),(0,0)) x2 + (2,0) mark_A(x1) = ((1,1),(0,0)) x1 a_____A(x1,x2) = ((1,1),(0,0)) x1 + ((1,1),(0,0)) x2 + (2,0) mark#_A(x1) = x1 + (3,0) and_A(x1,x2) = x1 + ((1,1),(0,0)) x2 + (1,0) a__and#_A(x1,x2) = x2 + (3,0) tt_A() = (0,0) isList_A(x1) = ((1,1),(0,0)) x1 + (1,0) a__isList#_A(x1) = x1 + (4,0) a__isNeList#_A(x1) = x1 + (2,0) a__isList_A(x1) = ((1,1),(0,0)) x1 + (1,0) isNeList_A(x1) = x1 + (1,0) a__isNeList_A(x1) = x1 + (1,0) isNePal_A(x1) = x1 + (1,0) a__isNePal#_A(x1) = x1 a__isQid_A(x1) = (0,0) isPal_A(x1) = x1 + (1,0) a__isPal#_A(x1) = x1 + (4,0) a__and_A(x1,x2) = x1 + ((1,1),(0,0)) x2 + (1,0) a__isNePal_A(x1) = x1 + (1,0) a__isPal_A(x1) = x1 + (1,0) nil_A() = (1,0) a_A() = (1,0) e_A() = (1,0) i_A() = (1,0) o_A() = (1,0) u_A() = (1,0) isQid_A(x1) = (0,0) The next rules are strictly ordered: p2, p4, p5, p6, p7, p8, p10, p12, p15, p16, p18, p19, p20, p23, p24 We remove them from the problem. -- SCC decomposition. Consider the dependency pair problem (P, R), where P consists of p1: a____#(__(X,Y),Z) -> a____#(mark(X),a____(mark(Y),mark(Z))) p2: mark#(__(X1,X2)) -> a____#(mark(X1),mark(X2)) p3: a__and#(tt(),X) -> mark#(X) p4: mark#(isList(X)) -> a__isList#(X) p5: a__isNeList#(__(V1,V2)) -> a__and#(a__isList(V1),isNeList(V2)) p6: a__isNeList#(__(V1,V2)) -> a__isList#(V1) p7: a__isNeList#(__(V1,V2)) -> a__and#(a__isNeList(V1),isList(V2)) p8: a__isNePal#(__(I,__(P,I))) -> a__and#(a__isQid(I),isPal(P)) p9: mark#(isPal(X)) -> a__isPal#(X) and R consists of: r1: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) r2: a____(X,nil()) -> mark(X) r3: a____(nil(),X) -> mark(X) r4: a__and(tt(),X) -> mark(X) r5: a__isList(V) -> a__isNeList(V) r6: a__isList(nil()) -> tt() r7: a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) r8: a__isNeList(V) -> a__isQid(V) r9: a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) r10: a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) r11: a__isNePal(V) -> a__isQid(V) r12: a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) r13: a__isPal(V) -> a__isNePal(V) r14: a__isPal(nil()) -> tt() r15: a__isQid(a()) -> tt() r16: a__isQid(e()) -> tt() r17: a__isQid(i()) -> tt() r18: a__isQid(o()) -> tt() r19: a__isQid(u()) -> tt() r20: mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) r21: mark(and(X1,X2)) -> a__and(mark(X1),X2) r22: mark(isList(X)) -> a__isList(X) r23: mark(isNeList(X)) -> a__isNeList(X) r24: mark(isQid(X)) -> a__isQid(X) r25: mark(isNePal(X)) -> a__isNePal(X) r26: mark(isPal(X)) -> a__isPal(X) r27: mark(nil()) -> nil() r28: mark(tt()) -> tt() r29: mark(a()) -> a() r30: mark(e()) -> e() r31: mark(i()) -> i() r32: mark(o()) -> o() r33: mark(u()) -> u() r34: a____(X1,X2) -> __(X1,X2) r35: a__and(X1,X2) -> and(X1,X2) r36: a__isList(X) -> isList(X) r37: a__isNeList(X) -> isNeList(X) r38: a__isQid(X) -> isQid(X) r39: a__isNePal(X) -> isNePal(X) r40: a__isPal(X) -> isPal(X) The estimated dependency graph contains the following SCCs: {p1} -- Reduction pair. Consider the dependency pair problem (P, R), where P consists of p1: a____#(__(X,Y),Z) -> a____#(mark(X),a____(mark(Y),mark(Z))) and R consists of: r1: a____(__(X,Y),Z) -> a____(mark(X),a____(mark(Y),mark(Z))) r2: a____(X,nil()) -> mark(X) r3: a____(nil(),X) -> mark(X) r4: a__and(tt(),X) -> mark(X) r5: a__isList(V) -> a__isNeList(V) r6: a__isList(nil()) -> tt() r7: a__isList(__(V1,V2)) -> a__and(a__isList(V1),isList(V2)) r8: a__isNeList(V) -> a__isQid(V) r9: a__isNeList(__(V1,V2)) -> a__and(a__isList(V1),isNeList(V2)) r10: a__isNeList(__(V1,V2)) -> a__and(a__isNeList(V1),isList(V2)) r11: a__isNePal(V) -> a__isQid(V) r12: a__isNePal(__(I,__(P,I))) -> a__and(a__isQid(I),isPal(P)) r13: a__isPal(V) -> a__isNePal(V) r14: a__isPal(nil()) -> tt() r15: a__isQid(a()) -> tt() r16: a__isQid(e()) -> tt() r17: a__isQid(i()) -> tt() r18: a__isQid(o()) -> tt() r19: a__isQid(u()) -> tt() r20: mark(__(X1,X2)) -> a____(mark(X1),mark(X2)) r21: mark(and(X1,X2)) -> a__and(mark(X1),X2) r22: mark(isList(X)) -> a__isList(X) r23: mark(isNeList(X)) -> a__isNeList(X) r24: mark(isQid(X)) -> a__isQid(X) r25: mark(isNePal(X)) -> a__isNePal(X) r26: mark(isPal(X)) -> a__isPal(X) r27: mark(nil()) -> nil() r28: mark(tt()) -> tt() r29: mark(a()) -> a() r30: mark(e()) -> e() r31: mark(i()) -> i() r32: mark(o()) -> o() r33: mark(u()) -> u() r34: a____(X1,X2) -> __(X1,X2) r35: a__and(X1,X2) -> and(X1,X2) r36: a__isList(X) -> isList(X) r37: a__isNeList(X) -> isNeList(X) r38: a__isQid(X) -> isQid(X) r39: a__isNePal(X) -> isNePal(X) r40: a__isPal(X) -> isPal(X) The set of usable rules consists of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29, r30, r31, r32, r33, r34, r35, r36, r37, r38, r39, r40 Take the reduction pair: matrix interpretations: carrier: N^2 order: standard order interpretations: a____#_A(x1,x2) = ((1,1),(1,0)) x1 ___A(x1,x2) = ((1,1),(1,1)) x1 + x2 + (1,0) mark_A(x1) = x1 a_____A(x1,x2) = ((1,1),(1,1)) x1 + x2 + (1,0) a__and_A(x1,x2) = ((0,1),(1,1)) x1 + x2 tt_A() = (0,0) a__isList_A(x1) = ((0,1),(1,1)) x1 a__isNeList_A(x1) = ((0,1),(1,1)) x1 nil_A() = (0,0) isList_A(x1) = ((0,1),(1,1)) x1 a__isQid_A(x1) = ((0,1),(1,1)) x1 isNeList_A(x1) = ((0,1),(1,1)) x1 a__isNePal_A(x1) = ((1,1),(1,1)) x1 isPal_A(x1) = ((1,1),(1,1)) x1 a__isPal_A(x1) = ((1,1),(1,1)) x1 a_A() = (0,0) e_A() = (0,0) i_A() = (0,0) o_A() = (0,0) u_A() = (0,0) and_A(x1,x2) = ((0,1),(1,1)) x1 + x2 isQid_A(x1) = ((0,1),(1,1)) x1 isNePal_A(x1) = ((1,1),(1,1)) x1 The next rules are strictly ordered: p1 We remove them from the problem. Then no dependency pair remains.