WORST_CASE(Omega(n^1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l6 0: l0 -> l1 : __const_50^0'=__const_50^post_1, i5^0'=i5^post_1, i^0'=i^post_1, tmp^0'=tmp^post_1, [ __const_50^0<=i5^0 && i^post_1==0 && __const_50^0==__const_50^post_1 && i5^0==i5^post_1 && tmp^0==tmp^post_1 ], cost: 1 1: l0 -> l2 : __const_50^0'=__const_50^post_2, i5^0'=i5^post_2, i^0'=i^post_2, tmp^0'=tmp^post_2, [ 1+i5^0<=__const_50^0 && i5^post_2==1+i5^0 && __const_50^0==__const_50^post_2 && i^0==i^post_2 && tmp^0==tmp^post_2 ], cost: 1 3: l1 -> l3 : __const_50^0'=__const_50^post_4, i5^0'=i5^post_4, i^0'=i^post_4, tmp^0'=tmp^post_4, [ __const_50^0==__const_50^post_4 && i^0==i^post_4 && i5^0==i5^post_4 && tmp^0==tmp^post_4 ], cost: 1 2: l2 -> l0 : __const_50^0'=__const_50^post_3, i5^0'=i5^post_3, i^0'=i^post_3, tmp^0'=tmp^post_3, [ __const_50^0==__const_50^post_3 && i^0==i^post_3 && i5^0==i5^post_3 && tmp^0==tmp^post_3 ], cost: 1 4: l3 -> l4 : __const_50^0'=__const_50^post_5, i5^0'=i5^post_5, i^0'=i^post_5, tmp^0'=tmp^post_5, [ __const_50^0<=i^0 && __const_50^0==__const_50^post_5 && i^0==i^post_5 && i5^0==i5^post_5 && tmp^0==tmp^post_5 ], cost: 1 5: l3 -> l1 : __const_50^0'=__const_50^post_6, i5^0'=i5^post_6, i^0'=i^post_6, tmp^0'=tmp^post_6, [ 1+i^0<=__const_50^0 && i^post_6==1+i^0 && __const_50^0==__const_50^post_6 && i5^0==i5^post_6 && tmp^0==tmp^post_6 ], cost: 1 6: l5 -> l2 : __const_50^0'=__const_50^post_7, i5^0'=i5^post_7, i^0'=i^post_7, tmp^0'=tmp^post_7, [ i^post_7==0 && tmp^post_7==tmp^post_7 && i5^1_1==0 && i5^post_7==0 && __const_50^0==__const_50^post_7 ], cost: 1 7: l6 -> l5 : __const_50^0'=__const_50^post_8, i5^0'=i5^post_8, i^0'=i^post_8, tmp^0'=tmp^post_8, [ __const_50^0==__const_50^post_8 && i^0==i^post_8 && i5^0==i5^post_8 && tmp^0==tmp^post_8 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 7: l6 -> l5 : __const_50^0'=__const_50^post_8, i5^0'=i5^post_8, i^0'=i^post_8, tmp^0'=tmp^post_8, [ __const_50^0==__const_50^post_8 && i^0==i^post_8 && i5^0==i5^post_8 && tmp^0==tmp^post_8 ], cost: 1 Removed unreachable and leaf rules: Start location: l6 0: l0 -> l1 : __const_50^0'=__const_50^post_1, i5^0'=i5^post_1, i^0'=i^post_1, tmp^0'=tmp^post_1, [ __const_50^0<=i5^0 && i^post_1==0 && __const_50^0==__const_50^post_1 && i5^0==i5^post_1 && tmp^0==tmp^post_1 ], cost: 1 1: l0 -> l2 : __const_50^0'=__const_50^post_2, i5^0'=i5^post_2, i^0'=i^post_2, tmp^0'=tmp^post_2, [ 1+i5^0<=__const_50^0 && i5^post_2==1+i5^0 && __const_50^0==__const_50^post_2 && i^0==i^post_2 && tmp^0==tmp^post_2 ], cost: 1 3: l1 -> l3 : __const_50^0'=__const_50^post_4, i5^0'=i5^post_4, i^0'=i^post_4, tmp^0'=tmp^post_4, [ __const_50^0==__const_50^post_4 && i^0==i^post_4 && i5^0==i5^post_4 && tmp^0==tmp^post_4 ], cost: 1 2: l2 -> l0 : __const_50^0'=__const_50^post_3, i5^0'=i5^post_3, i^0'=i^post_3, tmp^0'=tmp^post_3, [ __const_50^0==__const_50^post_3 && i^0==i^post_3 && i5^0==i5^post_3 && tmp^0==tmp^post_3 ], cost: 1 5: l3 -> l1 : __const_50^0'=__const_50^post_6, i5^0'=i5^post_6, i^0'=i^post_6, tmp^0'=tmp^post_6, [ 1+i^0<=__const_50^0 && i^post_6==1+i^0 && __const_50^0==__const_50^post_6 && i5^0==i5^post_6 && tmp^0==tmp^post_6 ], cost: 1 6: l5 -> l2 : __const_50^0'=__const_50^post_7, i5^0'=i5^post_7, i^0'=i^post_7, tmp^0'=tmp^post_7, [ i^post_7==0 && tmp^post_7==tmp^post_7 && i5^1_1==0 && i5^post_7==0 && __const_50^0==__const_50^post_7 ], cost: 1 7: l6 -> l5 : __const_50^0'=__const_50^post_8, i5^0'=i5^post_8, i^0'=i^post_8, tmp^0'=tmp^post_8, [ __const_50^0==__const_50^post_8 && i^0==i^post_8 && i5^0==i5^post_8 && tmp^0==tmp^post_8 ], cost: 1 Simplified all rules, resulting in: Start location: l6 0: l0 -> l1 : i^0'=0, [ __const_50^0<=i5^0 ], cost: 1 1: l0 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 1 3: l1 -> l3 : [], cost: 1 2: l2 -> l0 : [], cost: 1 5: l3 -> l1 : i^0'=1+i^0, [ 1+i^0<=__const_50^0 ], cost: 1 6: l5 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 1 7: l6 -> l5 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l6 0: l0 -> l1 : i^0'=0, [ __const_50^0<=i5^0 ], cost: 1 1: l0 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 1 9: l1 -> l1 : i^0'=1+i^0, [ 1+i^0<=__const_50^0 ], cost: 2 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 Accelerating simple loops of location 1. Accelerating the following rules: 9: l1 -> l1 : i^0'=1+i^0, [ 1+i^0<=__const_50^0 ], cost: 2 Accelerated rule 9 with metering function -i^0+__const_50^0, yielding the new rule 10. Removing the simple loops: 9. Accelerated all simple loops using metering functions (where possible): Start location: l6 0: l0 -> l1 : i^0'=0, [ __const_50^0<=i5^0 ], cost: 1 1: l0 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 1 10: l1 -> l1 : i^0'=__const_50^0, [ 1+i^0<=__const_50^0 ], cost: -2*i^0+2*__const_50^0 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l6 0: l0 -> l1 : i^0'=0, [ __const_50^0<=i5^0 ], cost: 1 1: l0 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 1 11: l0 -> l1 : i^0'=__const_50^0, [ __const_50^0<=i5^0 && 1<=__const_50^0 ], cost: 1+2*__const_50^0 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 Removed unreachable locations (and leaf rules with constant cost): Start location: l6 1: l0 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 1 11: l0 -> l1 : i^0'=__const_50^0, [ __const_50^0<=i5^0 && 1<=__const_50^0 ], cost: 1+2*__const_50^0 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 Eliminated locations (on tree-shaped paths): Start location: l6 12: l2 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 2 13: l2 -> l1 : i^0'=__const_50^0, [ __const_50^0<=i5^0 && 1<=__const_50^0 ], cost: 2+2*__const_50^0 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 Accelerating simple loops of location 2. Accelerating the following rules: 12: l2 -> l2 : i5^0'=1+i5^0, [ 1+i5^0<=__const_50^0 ], cost: 2 Accelerated rule 12 with metering function __const_50^0-i5^0, yielding the new rule 14. Removing the simple loops: 12. Accelerated all simple loops using metering functions (where possible): Start location: l6 13: l2 -> l1 : i^0'=__const_50^0, [ __const_50^0<=i5^0 && 1<=__const_50^0 ], cost: 2+2*__const_50^0 14: l2 -> l2 : i5^0'=__const_50^0, [ 1+i5^0<=__const_50^0 ], cost: 2*__const_50^0-2*i5^0 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l6 13: l2 -> l1 : i^0'=__const_50^0, [ __const_50^0<=i5^0 && 1<=__const_50^0 ], cost: 2+2*__const_50^0 8: l6 -> l2 : i5^0'=0, i^0'=0, tmp^0'=tmp^post_7, [], cost: 2 15: l6 -> l2 : i5^0'=__const_50^0, i^0'=0, tmp^0'=tmp^post_7, [ 1<=__const_50^0 ], cost: 2+2*__const_50^0 Eliminated locations (on tree-shaped paths): Start location: l6 16: l6 -> l1 : i5^0'=__const_50^0, i^0'=__const_50^0, tmp^0'=tmp^post_7, [ 1<=__const_50^0 ], cost: 4+4*__const_50^0 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l6 16: l6 -> l1 : i5^0'=__const_50^0, i^0'=__const_50^0, tmp^0'=tmp^post_7, [ 1<=__const_50^0 ], cost: 4+4*__const_50^0 Computing asymptotic complexity for rule 16 Solved the limit problem by the following transformations: Created initial limit problem: 4+4*__const_50^0 (+), __const_50^0 (+/+!) [not solved] removing all constraints (solved by SMT) resulting limit problem: [solved] applying transformation rule (C) using substitution {__const_50^0==n} resulting limit problem: [solved] Solution: __const_50^0 / n Resulting cost 4+4*n has complexity: Poly(n^1) Found new complexity Poly(n^1). Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Poly(n^1) Cpx degree: 1 Solved cost: 4+4*n Rule cost: 4+4*__const_50^0 Rule guard: [ 1<=__const_50^0 ] WORST_CASE(Omega(n^1),?)