Marked_a__anda__isNatU11Marked_marksanda__U21isNatMarked_a__U21a__U11Marked_a__isNata__andplusMarked_a__U11ttU21a__plus0Marked_a__plusmarkX3X2X1V2V1XMNa__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U11(tt,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_a__plus(N,0)Marked_a__U11(a__isNat(N),N)Marked_a__plus(N,0)Marked_a__isNat(N)Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U11(X1,X2))Marked_a__U11(mark(X1),X2)Marked_mark(U11(X1,X2))Marked_mark(X1)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)Marked_mark(s(X))Marked_mark(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U11(tt,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_a__plus(N,0)Marked_a__U11(a__isNat(N),N)Marked_a__plus(N,0)Marked_a__isNat(N)Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U11(X1,X2))Marked_a__U11(mark(X1),X2)Marked_mark(U11(X1,X2))Marked_mark(X1)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)Marked_mark(s(X))Marked_mark(X)mark10Marked_a__plus110010a__plus210U212120tt0Marked_a__U1110plus210a__and120Marked_a__isNat0a__U11110Marked_a__U21110isNat0a__U212120and120s10Marked_mark10U11110a__isNat0Marked_a__and20Marked_a__plus(N,0)Marked_a__U11(a__isNat(N),N)Marked_a__plus(N,0)Marked_a__isNat(N)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U11(tt,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U11(X1,X2))Marked_a__U11(mark(X1),X2)Marked_mark(U11(X1,X2))Marked_mark(X1)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)Marked_mark(s(X))Marked_mark(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U11(tt,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U11(X1,X2))Marked_a__U11(mark(X1),X2)Marked_mark(U11(X1,X2))Marked_mark(X1)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)Marked_mark(s(X))Marked_mark(X)mark10Marked_a__plus220020a__plus120U212210tt0Marked_a__U1120plus120a__and120Marked_a__isNat0a__U111210Marked_a__U21220isNat0a__U212210and120s10Marked_mark20U111210a__isNat0Marked_a__and20Marked_mark(U11(X1,X2))Marked_a__U11(mark(X1),X2)Marked_mark(U11(X1,X2))Marked_mark(X1)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U11(tt,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)Marked_mark(s(X))Marked_mark(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)Marked_mark(s(X))Marked_mark(X)mark10Marked_a__plus23000a__plus120U2131210tt0plus120a__and220Marked_a__isNat20a__U1110Marked_a__U212320isNat0a__U2131210and220s310Marked_mark220U1110a__isNat0Marked_a__and220Marked_a__U21(tt,M,N)Marked_a__plus(mark(N),mark(M))Marked_a__plus(N,s(M))Marked_a__U21(a__and(a__isNat(M),isNat(N)),M,N)Marked_a__plus(N,s(M))Marked_a__and(a__isNat(M),isNat(N))Marked_a__plus(N,s(M))Marked_a__isNat(M)Marked_mark(U21(X1,X2,X3))Marked_a__U21(mark(X1),X2,X3)Marked_mark(U21(X1,X2,X3))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_a__plus(mark(X1),mark(X2))Marked_mark(s(X))Marked_mark(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__U21(tt,M,N)Marked_mark(N)Marked_a__U21(tt,M,N)Marked_mark(M)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_a__isNat(s(V1))Marked_a__isNat(V1)Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)mark1000a__plus110U212110tt0plus110a__and110Marked_a__isNat20a__U1110isNat20a__U212110and110s210Marked_mark10U1110a__isNat20Marked_a__and10Marked_a__isNat(s(V1))Marked_a__isNat(V1)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)mark1000a__plus2220U210tt0plus2220a__and220Marked_a__isNat0a__U11210isNat0a__U210and220s0Marked_mark10U11210a__isNat0Marked_a__and10Marked_mark(plus(X1,X2))Marked_mark(X1)Marked_mark(plus(X1,X2))Marked_mark(X2)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__and(tt,X)Marked_mark(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)mark10010a__plus220U21220tt10plus220a__and210Marked_a__isNat20a__U1110isNat10a__U21220and210s10Marked_mark20U1110a__isNat10Marked_a__and220Marked_a__and(tt,X)Marked_mark(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__isNat(plus(V1,V2))Marked_a__and(a__isNat(V1),isNat(V2))Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)Marked_mark(and(X1,X2))Marked_a__and(mark(X1),X2)Marked_mark(and(X1,X2))Marked_mark(X1)Marked_mark(isNat(X))Marked_a__isNat(X)a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_mark(and(X1,X2))Marked_mark(X1)mark1000a__plus1120U211210tt0plus1120a__and1110a__U11110isNat10a__U211210and1110s10Marked_mark30U11110a__isNat10a__U11(tt,N)mark(N)a__U21(tt,M,N)s(a__plus(mark(N),mark(M)))a__and(tt,X)mark(X)a__isNat(0)tta__isNat(plus(V1,V2))a__and(a__isNat(V1),isNat(V2))a__isNat(s(V1))a__isNat(V1)a__plus(N,0)a__U11(a__isNat(N),N)a__plus(N,s(M))a__U21(a__and(a__isNat(M),isNat(N)),M,N)mark(U11(X1,X2))a__U11(mark(X1),X2)mark(U21(X1,X2,X3))a__U21(mark(X1),X2,X3)mark(plus(X1,X2))a__plus(mark(X1),mark(X2))mark(and(X1,X2))a__and(mark(X1),X2)mark(isNat(X))a__isNat(X)mark(tt)ttmark(s(X))s(mark(X))mark(0)0a__U11(X1,X2)U11(X1,X2)a__U21(X1,X2,X3)U21(X1,X2,X3)a__plus(X1,X2)plus(X1,X2)a__and(X1,X2)and(X1,X2)a__isNat(X)isNat(X)Marked_a__isNat(plus(V1,V2))Marked_a__isNat(V1)mark2000a__plus220U2120tt0plus220a__and20Marked_a__isNat30a__U1120isNat0a__U2120and20s20U1110a__isNat0