NO ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l5 0: l0 -> l1 : n^0'=n^post_1, x^0'=x^post_1, [ n^0==n^post_1 && x^0==x^post_1 ], cost: 1 1: l1 -> l0 : n^0'=n^post_2, x^0'=x^post_2, [ n^0==n^post_2 && x^0==x^post_2 ], cost: 1 2: l2 -> l0 : n^0'=n^post_3, x^0'=x^post_3, [ n^0<=0 && x^1_1==0 && x^post_3==1 && n^0==n^post_3 ], cost: 1 3: l2 -> l3 : n^0'=n^post_4, x^0'=x^post_4, [ 1<=n^0 && n^0==n^post_4 && x^0==x^post_4 ], cost: 1 4: l3 -> l2 : n^0'=n^post_5, x^0'=x^post_5, [ n^0==n^post_5 && x^0==x^post_5 ], cost: 1 5: l4 -> l2 : n^0'=n^post_6, x^0'=x^post_6, [ n^post_6==n^post_6 && x^post_6==1 ], cost: 1 6: l5 -> l4 : n^0'=n^post_7, x^0'=x^post_7, [ n^0==n^post_7 && x^0==x^post_7 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 6: l5 -> l4 : n^0'=n^post_7, x^0'=x^post_7, [ n^0==n^post_7 && x^0==x^post_7 ], cost: 1 Simplified all rules, resulting in: Start location: l5 0: l0 -> l1 : [], cost: 1 1: l1 -> l0 : [], cost: 1 2: l2 -> l0 : x^0'=1, [ n^0<=0 ], cost: 1 3: l2 -> l3 : [ 1<=n^0 ], cost: 1 4: l3 -> l2 : [], cost: 1 5: l4 -> l2 : n^0'=n^post_6, x^0'=1, [], cost: 1 6: l5 -> l4 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l5 9: l0 -> l0 : [], cost: 2 2: l2 -> l0 : x^0'=1, [ n^0<=0 ], cost: 1 8: l2 -> l2 : [ 1<=n^0 ], cost: 2 7: l5 -> l2 : n^0'=n^post_6, x^0'=1, [], cost: 2 Accelerating simple loops of location 0. Accelerating the following rules: 9: l0 -> l0 : [], cost: 2 Accelerated rule 9 with non-termination, yielding the new rule 10. [accelerate] Nesting with 0 inner and 0 outer candidates Removing the simple loops: 9. Accelerating simple loops of location 2. Accelerating the following rules: 8: l2 -> l2 : [ 1<=n^0 ], cost: 2 Accelerated rule 8 with non-termination, yielding the new rule 11. [accelerate] Nesting with 0 inner and 0 outer candidates Removing the simple loops: 8. Accelerated all simple loops using metering functions (where possible): Start location: l5 10: l0 -> [6] : [], cost: NONTERM 2: l2 -> l0 : x^0'=1, [ n^0<=0 ], cost: 1 11: l2 -> [7] : [ 1<=n^0 ], cost: NONTERM 7: l5 -> l2 : n^0'=n^post_6, x^0'=1, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l5 2: l2 -> l0 : x^0'=1, [ n^0<=0 ], cost: 1 12: l2 -> [6] : [ n^0<=0 ], cost: NONTERM 7: l5 -> l2 : n^0'=n^post_6, x^0'=1, [], cost: 2 13: l5 -> [7] : [], cost: NONTERM Removed unreachable locations (and leaf rules with constant cost): Start location: l5 12: l2 -> [6] : [ n^0<=0 ], cost: NONTERM 7: l5 -> l2 : n^0'=n^post_6, x^0'=1, [], cost: 2 13: l5 -> [7] : [], cost: NONTERM Eliminated locations (on linear paths): Start location: l5 13: l5 -> [7] : [], cost: NONTERM 14: l5 -> [6] : [ n^post_6<=0 ], cost: NONTERM ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l5 13: l5 -> [7] : [], cost: NONTERM 14: l5 -> [6] : [ n^post_6<=0 ], cost: NONTERM Computing asymptotic complexity for rule 13 Guard is satisfiable, yielding nontermination Resulting cost NONTERM has complexity: Nonterm Found new complexity Nonterm. Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Nonterm Cpx degree: Nonterm Solved cost: NONTERM Rule cost: NONTERM Rule guard: [] NO