YES

We show the termination of the TRS R:

  -(x,|0|()) -> x
  -(s(x),s(y)) -> -(x,y)
  p(s(x)) -> x
  f(s(x),y) -> f(p(-(s(x),y)),p(-(y,s(x))))
  f(x,s(y)) -> f(p(-(x,s(y))),p(-(s(y),x)))

-- SCC decomposition.

Consider the dependency pair problem (P, R), where P consists of

p1: -#(s(x),s(y)) -> -#(x,y)
p2: f#(s(x),y) -> f#(p(-(s(x),y)),p(-(y,s(x))))
p3: f#(s(x),y) -> p#(-(s(x),y))
p4: f#(s(x),y) -> -#(s(x),y)
p5: f#(s(x),y) -> p#(-(y,s(x)))
p6: f#(s(x),y) -> -#(y,s(x))
p7: f#(x,s(y)) -> f#(p(-(x,s(y))),p(-(s(y),x)))
p8: f#(x,s(y)) -> p#(-(x,s(y)))
p9: f#(x,s(y)) -> -#(x,s(y))
p10: f#(x,s(y)) -> p#(-(s(y),x))
p11: f#(x,s(y)) -> -#(s(y),x)

and R consists of:

r1: -(x,|0|()) -> x
r2: -(s(x),s(y)) -> -(x,y)
r3: p(s(x)) -> x
r4: f(s(x),y) -> f(p(-(s(x),y)),p(-(y,s(x))))
r5: f(x,s(y)) -> f(p(-(x,s(y))),p(-(s(y),x)))

The estimated dependency graph contains the following SCCs:

  {p2, p7}
  {p1}


-- Reduction pair.

Consider the dependency pair problem (P, R), where P consists of

p1: f#(x,s(y)) -> f#(p(-(x,s(y))),p(-(s(y),x)))
p2: f#(s(x),y) -> f#(p(-(s(x),y)),p(-(y,s(x))))

and R consists of:

r1: -(x,|0|()) -> x
r2: -(s(x),s(y)) -> -(x,y)
r3: p(s(x)) -> x
r4: f(s(x),y) -> f(p(-(s(x),y)),p(-(y,s(x))))
r5: f(x,s(y)) -> f(p(-(x,s(y))),p(-(s(y),x)))

The set of usable rules consists of

  r1, r2, r3

Take the reduction pair:

  lexicographic combination of reduction pairs:
  
    1. max/plus interpretations on natural numbers:
    
      f#_A(x1,x2) = max{x1 + 1, x2 + 6}
      s_A(x1) = x1 + 9
      p_A(x1) = max{4, x1 - 8}
      -_A(x1,x2) = max{10, x1 + 1}
      |0|_A = 0
    
    2. max/plus interpretations on natural numbers:
    
      f#_A(x1,x2) = 0
      s_A(x1) = 0
      p_A(x1) = 0
      -_A(x1,x2) = 0
      |0|_A = 0
    

The next rules are strictly ordered:

  p1

We remove them from the problem.

-- SCC decomposition.

Consider the dependency pair problem (P, R), where P consists of

p1: f#(s(x),y) -> f#(p(-(s(x),y)),p(-(y,s(x))))

and R consists of:

r1: -(x,|0|()) -> x
r2: -(s(x),s(y)) -> -(x,y)
r3: p(s(x)) -> x
r4: f(s(x),y) -> f(p(-(s(x),y)),p(-(y,s(x))))
r5: f(x,s(y)) -> f(p(-(x,s(y))),p(-(s(y),x)))

The estimated dependency graph contains the following SCCs:

  {p1}


-- Reduction pair.

Consider the dependency pair problem (P, R), where P consists of

p1: f#(s(x),y) -> f#(p(-(s(x),y)),p(-(y,s(x))))

and R consists of:

r1: -(x,|0|()) -> x
r2: -(s(x),s(y)) -> -(x,y)
r3: p(s(x)) -> x
r4: f(s(x),y) -> f(p(-(s(x),y)),p(-(y,s(x))))
r5: f(x,s(y)) -> f(p(-(x,s(y))),p(-(s(y),x)))

The set of usable rules consists of

  r1, r2, r3

Take the reduction pair:

  lexicographic combination of reduction pairs:
  
    1. max/plus interpretations on natural numbers:
    
      f#_A(x1,x2) = max{1, x1 - 4, x2}
      s_A(x1) = max{7, x1 + 6}
      p_A(x1) = max{0, x1 - 5}
      -_A(x1,x2) = max{2, x1 + 1, x2 - 3}
      |0|_A = 0
    
    2. max/plus interpretations on natural numbers:
    
      f#_A(x1,x2) = 0
      s_A(x1) = 0
      p_A(x1) = 0
      -_A(x1,x2) = 0
      |0|_A = 0
    

The next rules are strictly ordered:

  p1

We remove them from the problem.  Then no dependency pair remains.

-- Reduction pair.

Consider the dependency pair problem (P, R), where P consists of

p1: -#(s(x),s(y)) -> -#(x,y)

and R consists of:

r1: -(x,|0|()) -> x
r2: -(s(x),s(y)) -> -(x,y)
r3: p(s(x)) -> x
r4: f(s(x),y) -> f(p(-(s(x),y)),p(-(y,s(x))))
r5: f(x,s(y)) -> f(p(-(x,s(y))),p(-(s(y),x)))

The set of usable rules consists of

  (no rules)

Take the reduction pair:

  lexicographic combination of reduction pairs:
  
    1. max/plus interpretations on natural numbers:
    
      -#_A(x1,x2) = max{x1, x2}
      s_A(x1) = max{2, x1 + 1}
    
    2. max/plus interpretations on natural numbers:
    
      -#_A(x1,x2) = 0
      s_A(x1) = 0
    

The next rules are strictly ordered:

  p1

We remove them from the problem.  Then no dependency pair remains.