YES Problem: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Proof: DP Processor: DPs: min#(s(x),s(y)) -> min#(x,y) max#(s(x),s(y)) -> max#(x,y) -#(s(x),s(y)) -> -#(x,y) gcd#(s(x),s(y)) -> min#(x,y) gcd#(s(x),s(y)) -> max#(x,y) gcd#(s(x),s(y)) -> -#(max(x,y),min(x,y)) gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) TDG Processor: DPs: min#(s(x),s(y)) -> min#(x,y) max#(s(x),s(y)) -> max#(x,y) -#(s(x),s(y)) -> -#(x,y) gcd#(s(x),s(y)) -> min#(x,y) gcd#(s(x),s(y)) -> max#(x,y) gcd#(s(x),s(y)) -> -#(max(x,y),min(x,y)) gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) graph: gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) -> gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) -> gcd#(s(x),s(y)) -> -#(max(x,y),min(x,y)) gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) -> gcd#(s(x),s(y)) -> max#(x,y) gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) -> gcd#(s(x),s(y)) -> min#(x,y) gcd#(s(x),s(y)) -> -#(max(x,y),min(x,y)) -> -#(s(x),s(y)) -> -#(x,y) gcd#(s(x),s(y)) -> max#(x,y) -> max#(s(x),s(y)) -> max#(x,y) gcd#(s(x),s(y)) -> min#(x,y) -> min#(s(x),s(y)) -> min#(x,y) -#(s(x),s(y)) -> -#(x,y) -> -#(s(x),s(y)) -> -#(x,y) max#(s(x),s(y)) -> max#(x,y) -> max#(s(x),s(y)) -> max#(x,y) min#(s(x),s(y)) -> min#(x,y) -> min#(s(x),s(y)) -> min#(x,y) SCC Processor: #sccs: 4 #rules: 4 #arcs: 10/49 DPs: gcd#(s(x),s(y)) -> gcd#(-(max(x,y),min(x,y)),s(min(x,y))) TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Arctic Interpretation Processor: dimension: 1 interpretation: [gcd#](x0, x1) = 1x0 + x1 + 0, [gcd](x0, x1) = x0 + x1 + 0, [-](x0, x1) = x0 + x1 + 0, [max](x0, x1) = x0 + x1 + 0, [s](x0) = 2x0 + 4, [min](x0, x1) = x0 + 0, [0] = 0 orientation: gcd#(s(x),s(y)) = 3x + 2y + 5 >= 2x + 1y + 4 = gcd#(-(max(x,y),min(x,y)),s(min(x,y))) min(x,0()) = x + 0 >= 0 = 0() min(0(),y) = 0 >= 0 = 0() min(s(x),s(y)) = 2x + 4 >= 2x + 4 = s(min(x,y)) max(x,0()) = x + 0 >= x = x max(0(),y) = y + 0 >= y = y max(s(x),s(y)) = 2x + 2y + 4 >= 2x + 2y + 4 = s(max(x,y)) -(x,0()) = x + 0 >= x = x -(s(x),s(y)) = 2x + 2y + 4 >= x + y + 0 = -(x,y) gcd(s(x),0()) = 2x + 4 >= 2x + 4 = s(x) gcd(0(),s(x)) = 2x + 4 >= 2x + 4 = s(x) gcd(s(x),s(y)) = 2x + 2y + 4 >= 2x + y + 4 = gcd(-(max(x,y),min(x,y)),s(min(x,y))) problem: DPs: TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Qed DPs: -#(s(x),s(y)) -> -#(x,y) TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Subterm Criterion Processor: simple projection: pi(-#) = 1 problem: DPs: TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Qed DPs: max#(s(x),s(y)) -> max#(x,y) TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Subterm Criterion Processor: simple projection: pi(max#) = 1 problem: DPs: TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Qed DPs: min#(s(x),s(y)) -> min#(x,y) TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Subterm Criterion Processor: simple projection: pi(min#) = 1 problem: DPs: TRS: min(x,0()) -> 0() min(0(),y) -> 0() min(s(x),s(y)) -> s(min(x,y)) max(x,0()) -> x max(0(),y) -> y max(s(x),s(y)) -> s(max(x,y)) -(x,0()) -> x -(s(x),s(y)) -> -(x,y) gcd(s(x),0()) -> s(x) gcd(0(),s(x)) -> s(x) gcd(s(x),s(y)) -> gcd(-(max(x,y),min(x,y)),s(min(x,y))) Qed