We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict Trs: { or(x, true()) -> true() , or(true(), y) -> true() , or(false(), false()) -> false() , mem(x, nil()) -> false() , mem(x, set(y)) -> =(x, y) , mem(x, union(y, z)) -> or(mem(x, y), mem(x, z)) } Obligation: runtime complexity Answer: YES(O(1),O(n^1)) We add the following weak dependency pairs: Strict DPs: { or^#(x, true()) -> c_1() , or^#(true(), y) -> c_2() , or^#(false(), false()) -> c_3() , mem^#(x, nil()) -> c_4() , mem^#(x, set(y)) -> c_5(x, y) , mem^#(x, union(y, z)) -> c_6(or^#(mem(x, y), mem(x, z))) } and mark the set of starting terms. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { or^#(x, true()) -> c_1() , or^#(true(), y) -> c_2() , or^#(false(), false()) -> c_3() , mem^#(x, nil()) -> c_4() , mem^#(x, set(y)) -> c_5(x, y) , mem^#(x, union(y, z)) -> c_6(or^#(mem(x, y), mem(x, z))) } Strict Trs: { or(x, true()) -> true() , or(true(), y) -> true() , or(false(), false()) -> false() , mem(x, nil()) -> false() , mem(x, set(y)) -> =(x, y) , mem(x, union(y, z)) -> or(mem(x, y), mem(x, z)) } Obligation: runtime complexity Answer: YES(O(1),O(n^1)) The weightgap principle applies (using the following constant growth matrix-interpretation) The following argument positions are usable: Uargs(or) = {1, 2}, Uargs(or^#) = {1, 2}, Uargs(c_6) = {1} TcT has computed the following constructor-restricted matrix interpretation. [or](x1, x2) = [1 0] x1 + [1 0] x2 + [2] [0 0] [0 0] [1] [true] = [2] [0] [false] = [1] [1] [mem](x1, x2) = [1 1] x2 + [1] [0 0] [1] [nil] = [2] [1] [set](x1) = [0] [0] [=](x1, x2) = [0] [0] [union](x1, x2) = [1 0] x1 + [1 0] x2 + [2] [0 1] [0 1] [2] [or^#](x1, x2) = [1 0] x1 + [1 1] x2 + [0] [0 0] [0 0] [0] [c_1] = [0] [0] [c_2] = [0] [0] [c_3] = [0] [0] [mem^#](x1, x2) = [1 1] x1 + [2 1] x2 + [0] [0 0] [0 0] [0] [c_4] = [0] [0] [c_5](x1, x2) = [0] [0] [c_6](x1) = [1 0] x1 + [0] [0 1] [0] The order satisfies the following ordering constraints: [or(x, true())] = [1 0] x + [4] [0 0] [1] > [2] [0] = [true()] [or(true(), y)] = [1 0] y + [4] [0 0] [1] > [2] [0] = [true()] [or(false(), false())] = [4] [1] > [1] [1] = [false()] [mem(x, nil())] = [4] [1] > [1] [1] = [false()] [mem(x, set(y))] = [1] [1] > [0] [0] = [=(x, y)] [mem(x, union(y, z))] = [1 1] y + [1 1] z + [5] [0 0] [0 0] [1] > [1 1] y + [1 1] z + [4] [0 0] [0 0] [1] = [or(mem(x, y), mem(x, z))] [or^#(x, true())] = [1 0] x + [2] [0 0] [0] > [0] [0] = [c_1()] [or^#(true(), y)] = [1 1] y + [2] [0 0] [0] > [0] [0] = [c_2()] [or^#(false(), false())] = [3] [0] > [0] [0] = [c_3()] [mem^#(x, nil())] = [1 1] x + [5] [0 0] [0] > [0] [0] = [c_4()] [mem^#(x, set(y))] = [1 1] x + [0] [0 0] [0] >= [0] [0] = [c_5(x, y)] [mem^#(x, union(y, z))] = [2 1] y + [1 1] x + [2 1] z + [6] [0 0] [0 0] [0 0] [0] > [1 1] y + [1 1] z + [3] [0 0] [0 0] [0] = [c_6(or^#(mem(x, y), mem(x, z)))] Further, it can be verified that all rules not oriented are covered by the weightgap condition. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { mem^#(x, set(y)) -> c_5(x, y) } Weak DPs: { or^#(x, true()) -> c_1() , or^#(true(), y) -> c_2() , or^#(false(), false()) -> c_3() , mem^#(x, nil()) -> c_4() , mem^#(x, union(y, z)) -> c_6(or^#(mem(x, y), mem(x, z))) } Weak Trs: { or(x, true()) -> true() , or(true(), y) -> true() , or(false(), false()) -> false() , mem(x, nil()) -> false() , mem(x, set(y)) -> =(x, y) , mem(x, union(y, z)) -> or(mem(x, y), mem(x, z)) } Obligation: runtime complexity Answer: YES(O(1),O(n^1)) The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. { or^#(x, true()) -> c_1() , or^#(true(), y) -> c_2() , or^#(false(), false()) -> c_3() , mem^#(x, nil()) -> c_4() , mem^#(x, union(y, z)) -> c_6(or^#(mem(x, y), mem(x, z))) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { mem^#(x, set(y)) -> c_5(x, y) } Weak Trs: { or(x, true()) -> true() , or(true(), y) -> true() , or(false(), false()) -> false() , mem(x, nil()) -> false() , mem(x, set(y)) -> =(x, y) , mem(x, union(y, z)) -> or(mem(x, y), mem(x, z)) } Obligation: runtime complexity Answer: YES(O(1),O(n^1)) No rule is usable, rules are removed from the input problem. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(n^1)). Strict DPs: { mem^#(x, set(y)) -> c_5(x, y) } Obligation: runtime complexity Answer: YES(O(1),O(n^1)) We use the processor 'matrix interpretation of dimension 1' to orient following rules strictly. DPs: { 1: mem^#(x, set(y)) -> c_5(x, y) } Sub-proof: ---------- The following argument positions are usable: none TcT has computed the following constructor-based matrix interpretation satisfying not(EDA). [set](x1) = [1] [mem^#](x1, x2) = [7] x1 + [1] x2 + [4] [c_5](x1, x2) = [1] x1 + [1] The order satisfies the following ordering constraints: [mem^#(x, set(y))] = [7] x + [5] > [1] x + [1] = [c_5(x, y)] The strictly oriented rules are moved into the weak component. We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Weak DPs: { mem^#(x, set(y)) -> c_5(x, y) } Obligation: runtime complexity Answer: YES(O(1),O(1)) The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed. { mem^#(x, set(y)) -> c_5(x, y) } We are left with following problem, upon which TcT provides the certificate YES(O(1),O(1)). Rules: Empty Obligation: runtime complexity Answer: YES(O(1),O(1)) Empty rules are trivially bounded Hurray, we answered YES(O(1),O(n^1))