NO ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l3 0: l0 -> l1 : __const_100^0'=__const_100^post_1, __const_200^0'=__const_200^post_1, __const_300^0'=__const_300^post_1, __const_400^0'=__const_400^post_1, x^0'=x^post_1, [ x^post_1==x^0+__const_300^0 && 1+__const_100^0<=x^post_1 && __const_100^0==__const_100^post_1 && __const_200^0==__const_200^post_1 && __const_300^0==__const_300^post_1 && __const_400^0==__const_400^post_1 ], cost: 1 1: l1 -> l0 : __const_100^0'=__const_100^post_2, __const_200^0'=__const_200^post_2, __const_300^0'=__const_300^post_2, __const_400^0'=__const_400^post_2, x^0'=x^post_2, [ x^post_2==x^0+__const_400^0 && 1+__const_100^0<=x^post_2 && __const_100^0==__const_100^post_2 && __const_200^0==__const_200^post_2 && __const_300^0==__const_300^post_2 && __const_400^0==__const_400^post_2 ], cost: 1 2: l2 -> l0 : __const_100^0'=__const_100^post_3, __const_200^0'=__const_200^post_3, __const_300^0'=__const_300^post_3, __const_400^0'=__const_400^post_3, x^0'=x^post_3, [ x^post_3==x^0+__const_200^0 && 1+__const_100^0<=x^post_3 && __const_100^0==__const_100^post_3 && __const_200^0==__const_200^post_3 && __const_300^0==__const_300^post_3 && __const_400^0==__const_400^post_3 ], cost: 1 3: l2 -> l1 : __const_100^0'=__const_100^post_4, __const_200^0'=__const_200^post_4, __const_300^0'=__const_300^post_4, __const_400^0'=__const_400^post_4, x^0'=x^post_4, [ x^post_4==x^0+__const_100^0 && 1+__const_100^0<=x^post_4 && __const_100^0==__const_100^post_4 && __const_200^0==__const_200^post_4 && __const_300^0==__const_300^post_4 && __const_400^0==__const_400^post_4 ], cost: 1 4: l3 -> l2 : __const_100^0'=__const_100^post_5, __const_200^0'=__const_200^post_5, __const_300^0'=__const_300^post_5, __const_400^0'=__const_400^post_5, x^0'=x^post_5, [ __const_100^0==__const_100^post_5 && __const_200^0==__const_200^post_5 && __const_300^0==__const_300^post_5 && __const_400^0==__const_400^post_5 && x^0==x^post_5 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 4: l3 -> l2 : __const_100^0'=__const_100^post_5, __const_200^0'=__const_200^post_5, __const_300^0'=__const_300^post_5, __const_400^0'=__const_400^post_5, x^0'=x^post_5, [ __const_100^0==__const_100^post_5 && __const_200^0==__const_200^post_5 && __const_300^0==__const_300^post_5 && __const_400^0==__const_400^post_5 && x^0==x^post_5 ], cost: 1 Simplified all rules, resulting in: Start location: l3 0: l0 -> l1 : x^0'=x^0+__const_300^0, [ 1+__const_100^0<=x^0+__const_300^0 ], cost: 1 1: l1 -> l0 : x^0'=x^0+__const_400^0, [ 1+__const_100^0<=x^0+__const_400^0 ], cost: 1 2: l2 -> l0 : x^0'=x^0+__const_200^0, [ 1+__const_100^0<=x^0+__const_200^0 ], cost: 1 3: l2 -> l1 : x^0'=x^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 ], cost: 1 4: l3 -> l2 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on tree-shaped paths): Start location: l3 0: l0 -> l1 : x^0'=x^0+__const_300^0, [ 1+__const_100^0<=x^0+__const_300^0 ], cost: 1 1: l1 -> l0 : x^0'=x^0+__const_400^0, [ 1+__const_100^0<=x^0+__const_400^0 ], cost: 1 5: l3 -> l0 : x^0'=x^0+__const_200^0, [ 1+__const_100^0<=x^0+__const_200^0 ], cost: 2 6: l3 -> l1 : x^0'=x^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 ], cost: 2 Eliminated location l0 (as a last resort): Start location: l3 7: l1 -> l1 : x^0'=x^0+__const_300^0+__const_400^0, [ 1+__const_100^0<=x^0+__const_400^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0 ], cost: 2 6: l3 -> l1 : x^0'=x^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 ], cost: 2 8: l3 -> l1 : x^0'=x^0+__const_200^0+__const_300^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 ], cost: 3 Accelerating simple loops of location 1. Accelerating the following rules: 7: l1 -> l1 : x^0'=x^0+__const_300^0+__const_400^0, [ 1+__const_100^0<=x^0+__const_400^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0 ], cost: 2 [test] deduced pseudo-invariant -__const_300^0-__const_400^0<=0, also trying __const_300^0+__const_400^0<=-1 Accelerated rule 7 with non-termination, yielding the new rule 9. Accelerated rule 7 with non-termination, yielding the new rule 10. Accelerated rule 7 with backward acceleration, yielding the new rule 11. Accelerated rule 7 with backward acceleration, yielding the new rule 12. [accelerate] Nesting with 1 inner and 1 outer candidates Also removing duplicate rules: 10. Accelerated all simple loops using metering functions (where possible): Start location: l3 7: l1 -> l1 : x^0'=x^0+__const_300^0+__const_400^0, [ 1+__const_100^0<=x^0+__const_400^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0 ], cost: 2 9: l1 -> [4] : [ 1+__const_100^0<=x^0+__const_400^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0 && x^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 11: l1 -> [4] : [ 1+__const_100^0<=x^0+__const_400^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 12: l1 -> l1 : x^0'=k*__const_300^0+x^0+k*__const_400^0, [ __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_400^0+(-1+k)*__const_300^0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0 ], cost: 2*k 6: l3 -> l1 : x^0'=x^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 ], cost: 2 8: l3 -> l1 : x^0'=x^0+__const_200^0+__const_300^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 ], cost: 3 Chained accelerated rules (with incoming rules): Start location: l3 6: l3 -> l1 : x^0'=x^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 ], cost: 2 8: l3 -> l1 : x^0'=x^0+__const_200^0+__const_300^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 ], cost: 3 13: l3 -> l1 : x^0'=x^0+__const_300^0+__const_400^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 ], cost: 4 14: l3 -> l1 : x^0'=x^0+__const_200^0+2*__const_300^0+__const_400^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 ], cost: 5 15: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && x^0+__const_100^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 16: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 && x^0+__const_200^0+__const_300^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 17: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 18: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 19: l3 -> l1 : x^0'=k*__const_300^0+x^0+k*__const_400^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 && __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_400^0+(-1+k)*__const_300^0+__const_100^0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0+__const_100^0 ], cost: 2+2*k 20: l3 -> l1 : x^0'=k*__const_300^0+x^0+__const_200^0+__const_300^0+k*__const_400^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+__const_200^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+(-1+k)*__const_400^0+2*__const_300^0+__const_400^0+(-1+k)*__const_300^0 ], cost: 3+2*k Removed unreachable locations (and leaf rules with constant cost): Start location: l3 15: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && x^0+__const_100^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 16: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 && x^0+__const_200^0+__const_300^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 17: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 18: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 19: l3 -> l1 : x^0'=k*__const_300^0+x^0+k*__const_400^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 && __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_400^0+(-1+k)*__const_300^0+__const_100^0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0+__const_100^0 ], cost: 2+2*k 20: l3 -> l1 : x^0'=k*__const_300^0+x^0+__const_200^0+__const_300^0+k*__const_400^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+__const_200^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+(-1+k)*__const_400^0+2*__const_300^0+__const_400^0+(-1+k)*__const_300^0 ], cost: 3+2*k ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l3 15: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && x^0+__const_100^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 16: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 && x^0+__const_200^0+__const_300^0==1 && __const_300^0==0 && __const_400^0==0 && __const_100^0==0 ], cost: NONTERM 17: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 18: l3 -> [4] : [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0+__const_400^0 && 1+__const_100^0<=x^0+__const_200^0+2*__const_300^0+__const_400^0 && -__const_300^0-__const_400^0<=0 ], cost: NONTERM 19: l3 -> l1 : x^0'=k*__const_300^0+x^0+k*__const_400^0+__const_100^0, [ 1+__const_100^0<=x^0+__const_100^0 && __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_400^0+(-1+k)*__const_300^0+__const_100^0 && 1+__const_100^0<=x^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0+__const_100^0 ], cost: 2+2*k 20: l3 -> l1 : x^0'=k*__const_300^0+x^0+__const_200^0+__const_300^0+k*__const_400^0, [ 1+__const_100^0<=x^0+__const_200^0 && 1+__const_100^0<=x^0+__const_200^0+__const_300^0 && __const_300^0+__const_400^0<=-1 && k>=0 && 1+__const_100^0<=x^0+__const_200^0+(-1+k)*__const_400^0+__const_300^0+__const_400^0+(-1+k)*__const_300^0 && 1+__const_100^0<=x^0+__const_200^0+(-1+k)*__const_400^0+2*__const_300^0+__const_400^0+(-1+k)*__const_300^0 ], cost: 3+2*k Computing asymptotic complexity for rule 17 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: [ 1+__const_100^0<=x^0+__const_100^0 && 1+__const_100^0<=x^0+__const_400^0+__const_100^0 && 1+__const_100^0<=x^0+__const_300^0+__const_400^0+__const_100^0 && -__const_300^0-__const_400^0<=0 ] NO