Left Termination proof of /tmp/tmp3wgbjE/sum.pl

Left Termination of the query pattern sum_in_3(g, g, a) w.r.t. the given Prolog program could successfully be proven:

↳ Prolog

  ↳ PrologToPiTRSProof

Clauses:

sum([], [], []).
sum(.(X1, Y1), .(X2, Y2), .(X3, Y3)) :- ','(add(X1, X2, X3), sum(Y1, Y2, Y3)).
add(0, X, X).
add(s(X), Y, s(Z)) :- add(X, Y, Z).

Queries:

sum(g,g,a).

We use the technique of [30]. With regard to the inferred argument filtering the predicates were used in the following modes:
sum_in: (b,b,f)
add_in: (b,b,f)
Transforming Prolog into the following Term Rewriting System:
Pi-finite rewrite system:
The TRS R consists of the following rules:

sum_in_gga([], [], []) → sum_out_gga([], [], [])
sum_in_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_gga(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))
U1_gga(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_out_gga(Y1, Y2, Y3)) → sum_out_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3))

Infinitary Constructor Rewriting Termination of PiTRS implies Termination of Prolog

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

Pi-finite rewrite system:
The TRS R consists of the following rules:

sum_in_gga([], [], []) → sum_out_gga([], [], [])
sum_in_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_gga(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))
U1_gga(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_out_gga(Y1, Y2, Y3)) → sum_out_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3))

The argument filtering Pi contains the following mapping:
sum_in_gga(x1, x2, x3) = sum_in_gga(x1, x2)
[] = []
sum_out_gga(x1, x2, x3) = sum_out_gga(x3)
.(x1, x2) = .(x1, x2)
U1_gga(x1, x2, x3, x4, x5, x6, x7) = U1_gga(x2, x4, x7)
add_in_gga(x1, x2, x3) = add_in_gga(x1, x2)
0 = 0
add_out_gga(x1, x2, x3) = add_out_gga(x3)
s(x1) = s(x1)
U3_gga(x1, x2, x3, x4) = U3_gga(x4)
U2_gga(x1, x2, x3, x4, x5, x6, x7) = U2_gga(x5, x7)

Using Dependency Pairs [1,30] we result in the following initial DP problem:
Pi DP problem:
The TRS P consists of the following rules:

SUM_IN_GGA(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
SUM_IN_GGA(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → ADD_IN_GGA(X1, X2, X3)
ADD_IN_GGA(s(X), Y, s(Z)) → U3_GGA(X, Y, Z, add_in_gga(X, Y, Z))
ADD_IN_GGA(s(X), Y, s(Z)) → ADD_IN_GGA(X, Y, Z)
U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_GGA(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → SUM_IN_GGA(Y1, Y2, Y3)

The TRS R consists of the following rules:

sum_in_gga([], [], []) → sum_out_gga([], [], [])
sum_in_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_gga(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))
U1_gga(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_out_gga(Y1, Y2, Y3)) → sum_out_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3))

The argument filtering Pi contains the following mapping:
sum_in_gga(x1, x2, x3) = sum_in_gga(x1, x2)
[] = []
sum_out_gga(x1, x2, x3) = sum_out_gga(x3)
.(x1, x2) = .(x1, x2)
U1_gga(x1, x2, x3, x4, x5, x6, x7) = U1_gga(x2, x4, x7)
add_in_gga(x1, x2, x3) = add_in_gga(x1, x2)
0 = 0
add_out_gga(x1, x2, x3) = add_out_gga(x3)
s(x1) = s(x1)
U3_gga(x1, x2, x3, x4) = U3_gga(x4)
U2_gga(x1, x2, x3, x4, x5, x6, x7) = U2_gga(x5, x7)
ADD_IN_GGA(x1, x2, x3) = ADD_IN_GGA(x1, x2)
U2_GGA(x1, x2, x3, x4, x5, x6, x7) = U2_GGA(x5, x7)
SUM_IN_GGA(x1, x2, x3) = SUM_IN_GGA(x1, x2)
U3_GGA(x1, x2, x3, x4) = U3_GGA(x4)
U1_GGA(x1, x2, x3, x4, x5, x6, x7) = U1_GGA(x2, x4, x7)

We have to consider all (P,R,Pi)-chains

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

Pi DP problem:
The TRS P consists of the following rules:

SUM_IN_GGA(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
SUM_IN_GGA(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → ADD_IN_GGA(X1, X2, X3)
ADD_IN_GGA(s(X), Y, s(Z)) → U3_GGA(X, Y, Z, add_in_gga(X, Y, Z))
ADD_IN_GGA(s(X), Y, s(Z)) → ADD_IN_GGA(X, Y, Z)
U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_GGA(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → SUM_IN_GGA(Y1, Y2, Y3)

The TRS R consists of the following rules:

sum_in_gga([], [], []) → sum_out_gga([], [], [])
sum_in_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_gga(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))
U1_gga(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_out_gga(Y1, Y2, Y3)) → sum_out_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3))

The argument filtering Pi contains the following mapping:
sum_in_gga(x1, x2, x3) = sum_in_gga(x1, x2)
[] = []
sum_out_gga(x1, x2, x3) = sum_out_gga(x3)
.(x1, x2) = .(x1, x2)
U1_gga(x1, x2, x3, x4, x5, x6, x7) = U1_gga(x2, x4, x7)
add_in_gga(x1, x2, x3) = add_in_gga(x1, x2)
0 = 0
add_out_gga(x1, x2, x3) = add_out_gga(x3)
s(x1) = s(x1)
U3_gga(x1, x2, x3, x4) = U3_gga(x4)
U2_gga(x1, x2, x3, x4, x5, x6, x7) = U2_gga(x5, x7)
ADD_IN_GGA(x1, x2, x3) = ADD_IN_GGA(x1, x2)
U2_GGA(x1, x2, x3, x4, x5, x6, x7) = U2_GGA(x5, x7)
SUM_IN_GGA(x1, x2, x3) = SUM_IN_GGA(x1, x2)
U3_GGA(x1, x2, x3, x4) = U3_GGA(x4)
U1_GGA(x1, x2, x3, x4, x5, x6, x7) = U1_GGA(x2, x4, x7)

We have to consider all (P,R,Pi)-chains
The approximation of the Dependency Graph [30] contains 2 SCCs with 3 less nodes.

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

            ↳ AND

              ↳ PiDP

                ↳ UsableRulesProof

              ↳ PiDP

Pi DP problem:
The TRS P consists of the following rules:

ADD_IN_GGA(s(X), Y, s(Z)) → ADD_IN_GGA(X, Y, Z)

The TRS R consists of the following rules:

sum_in_gga([], [], []) → sum_out_gga([], [], [])
sum_in_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_gga(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))
U1_gga(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_out_gga(Y1, Y2, Y3)) → sum_out_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3))

The argument filtering Pi contains the following mapping:
sum_in_gga(x1, x2, x3) = sum_in_gga(x1, x2)
[] = []
sum_out_gga(x1, x2, x3) = sum_out_gga(x3)
.(x1, x2) = .(x1, x2)
U1_gga(x1, x2, x3, x4, x5, x6, x7) = U1_gga(x2, x4, x7)
add_in_gga(x1, x2, x3) = add_in_gga(x1, x2)
0 = 0
add_out_gga(x1, x2, x3) = add_out_gga(x3)
s(x1) = s(x1)
U3_gga(x1, x2, x3, x4) = U3_gga(x4)
U2_gga(x1, x2, x3, x4, x5, x6, x7) = U2_gga(x5, x7)
ADD_IN_GGA(x1, x2, x3) = ADD_IN_GGA(x1, x2)

We have to consider all (P,R,Pi)-chains
For (infinitary) constructor rewriting [30] we can delete all non-usable rules from R.

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

            ↳ AND

              ↳ PiDP

                ↳ UsableRulesProof

                  ↳ PiDP

                    ↳ PiDPToQDPProof

              ↳ PiDP

Pi DP problem:
The TRS P consists of the following rules:

ADD_IN_GGA(s(X), Y, s(Z)) → ADD_IN_GGA(X, Y, Z)

R is empty.
The argument filtering Pi contains the following mapping:
s(x1) = s(x1)
ADD_IN_GGA(x1, x2, x3) = ADD_IN_GGA(x1, x2)

We have to consider all (P,R,Pi)-chains
Transforming (infinitary) constructor rewriting Pi-DP problem [30] into ordinary QDP problem [15] by application of Pi.

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

            ↳ AND

              ↳ PiDP

                ↳ UsableRulesProof

                  ↳ PiDP

                    ↳ PiDPToQDPProof

                      ↳ QDP

                        ↳ QDPSizeChangeProof

              ↳ PiDP

Q DP problem:
The TRS P consists of the following rules:

ADD_IN_GGA(s(X), Y) → ADD_IN_GGA(X, Y)

R is empty.
Q is empty.
We have to consider all (P,Q,R)-chains.
By using the subterm criterion [20] together with the size-change analysis [32] we have proven that there are no infinite chains for this DP problem.

From the DPs we obtained the following set of size-change graphs:

ADD_IN_GGA(s(X), Y) → ADD_IN_GGA(X, Y)
The graph contains the following edges 1 > 1, 2 >= 2

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

            ↳ AND

              ↳ PiDP

              ↳ PiDP

                ↳ UsableRulesProof

Pi DP problem:
The TRS P consists of the following rules:

SUM_IN_GGA(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → SUM_IN_GGA(Y1, Y2, Y3)

The TRS R consists of the following rules:

sum_in_gga([], [], []) → sum_out_gga([], [], [])
sum_in_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_gga(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))
U1_gga(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_in_gga(Y1, Y2, Y3))
U2_gga(X1, Y1, X2, Y2, X3, Y3, sum_out_gga(Y1, Y2, Y3)) → sum_out_gga(.(X1, Y1), .(X2, Y2), .(X3, Y3))

The argument filtering Pi contains the following mapping:
sum_in_gga(x1, x2, x3) = sum_in_gga(x1, x2)
[] = []
sum_out_gga(x1, x2, x3) = sum_out_gga(x3)
.(x1, x2) = .(x1, x2)
U1_gga(x1, x2, x3, x4, x5, x6, x7) = U1_gga(x2, x4, x7)
add_in_gga(x1, x2, x3) = add_in_gga(x1, x2)
0 = 0
add_out_gga(x1, x2, x3) = add_out_gga(x3)
s(x1) = s(x1)
U3_gga(x1, x2, x3, x4) = U3_gga(x4)
U2_gga(x1, x2, x3, x4, x5, x6, x7) = U2_gga(x5, x7)
SUM_IN_GGA(x1, x2, x3) = SUM_IN_GGA(x1, x2)
U1_GGA(x1, x2, x3, x4, x5, x6, x7) = U1_GGA(x2, x4, x7)

We have to consider all (P,R,Pi)-chains
For (infinitary) constructor rewriting [30] we can delete all non-usable rules from R.

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

            ↳ AND

              ↳ PiDP

              ↳ PiDP

                ↳ UsableRulesProof

                  ↳ PiDP

                    ↳ PiDPToQDPProof

Pi DP problem:
The TRS P consists of the following rules:

SUM_IN_GGA(.(X1, Y1), .(X2, Y2), .(X3, Y3)) → U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_in_gga(X1, X2, X3))
U1_GGA(X1, Y1, X2, Y2, X3, Y3, add_out_gga(X1, X2, X3)) → SUM_IN_GGA(Y1, Y2, Y3)

The TRS R consists of the following rules:

add_in_gga(0, X, X) → add_out_gga(0, X, X)
add_in_gga(s(X), Y, s(Z)) → U3_gga(X, Y, Z, add_in_gga(X, Y, Z))
U3_gga(X, Y, Z, add_out_gga(X, Y, Z)) → add_out_gga(s(X), Y, s(Z))

The argument filtering Pi contains the following mapping:
.(x1, x2) = .(x1, x2)
add_in_gga(x1, x2, x3) = add_in_gga(x1, x2)
0 = 0
add_out_gga(x1, x2, x3) = add_out_gga(x3)
s(x1) = s(x1)
U3_gga(x1, x2, x3, x4) = U3_gga(x4)
SUM_IN_GGA(x1, x2, x3) = SUM_IN_GGA(x1, x2)
U1_GGA(x1, x2, x3, x4, x5, x6, x7) = U1_GGA(x2, x4, x7)

We have to consider all (P,R,Pi)-chains
Transforming (infinitary) constructor rewriting Pi-DP problem [30] into ordinary QDP problem [15] by application of Pi.

↳ Prolog

  ↳ PrologToPiTRSProof

    ↳ PiTRS

      ↳ DependencyPairsProof

        ↳ PiDP

          ↳ DependencyGraphProof

            ↳ AND

              ↳ PiDP

              ↳ PiDP

                ↳ UsableRulesProof

                  ↳ PiDP

                    ↳ PiDPToQDPProof

                      ↳ QDP

                        ↳ QDPSizeChangeProof

Q DP problem:
The TRS P consists of the following rules:

SUM_IN_GGA(.(X1, Y1), .(X2, Y2)) → U1_GGA(Y1, Y2, add_in_gga(X1, X2))
U1_GGA(Y1, Y2, add_out_gga(X3)) → SUM_IN_GGA(Y1, Y2)

The TRS R consists of the following rules:

add_in_gga(0, X) → add_out_gga(X)
add_in_gga(s(X), Y) → U3_gga(add_in_gga(X, Y))
U3_gga(add_out_gga(Z)) → add_out_gga(s(Z))

The set Q consists of the following terms:

add_in_gga(x0, x1)
U3_gga(x0)

We have to consider all (P,Q,R)-chains.
By using the subterm criterion [20] together with the size-change analysis [32] we have proven that there are no infinite chains for this DP problem.

From the DPs we obtained the following set of size-change graphs:

U1_GGA(Y1, Y2, add_out_gga(X3)) → SUM_IN_GGA(Y1, Y2)
The graph contains the following edges 1 >= 1, 2 >= 2
SUM_IN_GGA(.(X1, Y1), .(X2, Y2)) → U1_GGA(Y1, Y2, add_in_gga(X1, X2))
The graph contains the following edges 1 > 1, 2 > 2