WORST_CASE(?,O(n^2)) * Step 1: NaturalPI WORST_CASE(?,O(n^2)) + Considered Problem: - Strict TRS: add(0(),y) -> y add(s(x),y) -> s(add(x,y)) mult(0(),y) -> 0() mult(s(x),y) -> add(y,mult(x,y)) - Signature: {add/2,mult/2} / {0/0,s/1} - Obligation: innermost runtime complexity wrt. defined symbols {add,mult} and constructors {0,s} + Applied Processor: NaturalPI {shape = Mixed 2, restrict = Restrict, uargs = UArgs, urules = URules, selector = Just any strict-rules} + Details: We apply a polynomial interpretation of kind constructor-based(mixed(2)): The following argument positions are considered usable: uargs(add) = {2}, uargs(s) = {1} Following symbols are considered usable: {add,mult} TcT has computed the following interpretation: p(0) = 0 p(add) = x1 + x2 p(mult) = 2 + x1*x2 + x1^2 + 3*x2^2 p(s) = 1 + x1 Following rules are strictly oriented: mult(0(),y) = 2 + 3*y^2 > 0 = 0() mult(s(x),y) = 3 + 2*x + x*y + x^2 + y + 3*y^2 > 2 + x*y + x^2 + y + 3*y^2 = add(y,mult(x,y)) Following rules are (at-least) weakly oriented: add(0(),y) = y >= y = y add(s(x),y) = 1 + x + y >= 1 + x + y = s(add(x,y)) * Step 2: NaturalPI WORST_CASE(?,O(n^2)) + Considered Problem: - Strict TRS: add(0(),y) -> y add(s(x),y) -> s(add(x,y)) - Weak TRS: mult(0(),y) -> 0() mult(s(x),y) -> add(y,mult(x,y)) - Signature: {add/2,mult/2} / {0/0,s/1} - Obligation: innermost runtime complexity wrt. defined symbols {add,mult} and constructors {0,s} + Applied Processor: NaturalPI {shape = Mixed 2, restrict = Restrict, uargs = UArgs, urules = URules, selector = Just any strict-rules} + Details: We apply a polynomial interpretation of kind constructor-based(mixed(2)): The following argument positions are considered usable: uargs(add) = {2}, uargs(s) = {1} Following symbols are considered usable: {add,mult} TcT has computed the following interpretation: p(0) = 1 p(add) = x1 + x2 p(mult) = 1 + x1*x2 p(s) = 2 + x1 Following rules are strictly oriented: add(0(),y) = 1 + y > y = y Following rules are (at-least) weakly oriented: add(s(x),y) = 2 + x + y >= 2 + x + y = s(add(x,y)) mult(0(),y) = 1 + y >= 1 = 0() mult(s(x),y) = 1 + x*y + 2*y >= 1 + x*y + y = add(y,mult(x,y)) * Step 3: NaturalPI WORST_CASE(?,O(n^2)) + Considered Problem: - Strict TRS: add(s(x),y) -> s(add(x,y)) - Weak TRS: add(0(),y) -> y mult(0(),y) -> 0() mult(s(x),y) -> add(y,mult(x,y)) - Signature: {add/2,mult/2} / {0/0,s/1} - Obligation: innermost runtime complexity wrt. defined symbols {add,mult} and constructors {0,s} + Applied Processor: NaturalPI {shape = Mixed 2, restrict = Restrict, uargs = UArgs, urules = URules, selector = Just any strict-rules} + Details: We apply a polynomial interpretation of kind constructor-based(mixed(2)): The following argument positions are considered usable: uargs(add) = {2}, uargs(s) = {1} Following symbols are considered usable: {add,mult} TcT has computed the following interpretation: p(0) = 0 p(add) = 2*x1 + x2 p(mult) = 2 + 2*x1*x2 p(s) = 1 + x1 Following rules are strictly oriented: add(s(x),y) = 2 + 2*x + y > 1 + 2*x + y = s(add(x,y)) Following rules are (at-least) weakly oriented: add(0(),y) = y >= y = y mult(0(),y) = 2 >= 0 = 0() mult(s(x),y) = 2 + 2*x*y + 2*y >= 2 + 2*x*y + 2*y = add(y,mult(x,y)) * Step 4: EmptyProcessor WORST_CASE(?,O(1)) + Considered Problem: - Weak TRS: add(0(),y) -> y add(s(x),y) -> s(add(x,y)) mult(0(),y) -> 0() mult(s(x),y) -> add(y,mult(x,y)) - Signature: {add/2,mult/2} / {0/0,s/1} - Obligation: innermost runtime complexity wrt. defined symbols {add,mult} and constructors {0,s} + Applied Processor: EmptyProcessor + Details: The problem is already closed. The intended complexity is O(1). WORST_CASE(?,O(n^2))