WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l6 0: l0 -> l1 : i^0'=i^post_1, j^0'=j^post_1, y4^0'=y4^post_1, y6^0'=y6^post_1, y8^0'=y8^post_1, [ 100<=i^0 && j^post_1==100 && i^0==i^post_1 && y4^0==y4^post_1 && y6^0==y6^post_1 && y8^0==y8^post_1 ], cost: 1 1: l0 -> l2 : i^0'=i^post_2, j^0'=j^post_2, y4^0'=y4^post_2, y6^0'=y6^post_2, y8^0'=y8^post_2, [ 1+i^0<=100 && y4^post_2==i^0 && y6^post_2==i^0 && i^post_2==1+i^0 && j^0==j^post_2 && y8^0==y8^post_2 ], cost: 1 5: l1 -> l3 : i^0'=i^post_6, j^0'=j^post_6, y4^0'=y4^post_6, y6^0'=y6^post_6, y8^0'=y8^post_6, [ i^0==i^post_6 && j^0==j^post_6 && y4^0==y4^post_6 && y6^0==y6^post_6 && y8^0==y8^post_6 ], cost: 1 2: l2 -> l0 : i^0'=i^post_3, j^0'=j^post_3, y4^0'=y4^post_3, y6^0'=y6^post_3, y8^0'=y8^post_3, [ i^0==i^post_3 && j^0==j^post_3 && y4^0==y4^post_3 && y6^0==y6^post_3 && y8^0==y8^post_3 ], cost: 1 3: l3 -> l4 : i^0'=i^post_4, j^0'=j^post_4, y4^0'=y4^post_4, y6^0'=y6^post_4, y8^0'=y8^post_4, [ 200<=j^0 && i^0==i^post_4 && j^0==j^post_4 && y4^0==y4^post_4 && y6^0==y6^post_4 && y8^0==y8^post_4 ], cost: 1 4: l3 -> l1 : i^0'=i^post_5, j^0'=j^post_5, y4^0'=y4^post_5, y6^0'=y6^post_5, y8^0'=y8^post_5, [ 1+j^0<=200 && y8^post_5==j^0 && j^post_5==1+j^0 && i^0==i^post_5 && y4^0==y4^post_5 && y6^0==y6^post_5 ], cost: 1 6: l5 -> l2 : i^0'=i^post_7, j^0'=j^post_7, y4^0'=y4^post_7, y6^0'=y6^post_7, y8^0'=y8^post_7, [ i^post_7==0 && j^0==j^post_7 && y4^0==y4^post_7 && y6^0==y6^post_7 && y8^0==y8^post_7 ], cost: 1 7: l6 -> l5 : i^0'=i^post_8, j^0'=j^post_8, y4^0'=y4^post_8, y6^0'=y6^post_8, y8^0'=y8^post_8, [ i^0==i^post_8 && j^0==j^post_8 && y4^0==y4^post_8 && y6^0==y6^post_8 && y8^0==y8^post_8 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 7: l6 -> l5 : i^0'=i^post_8, j^0'=j^post_8, y4^0'=y4^post_8, y6^0'=y6^post_8, y8^0'=y8^post_8, [ i^0==i^post_8 && j^0==j^post_8 && y4^0==y4^post_8 && y6^0==y6^post_8 && y8^0==y8^post_8 ], cost: 1 Removed unreachable and leaf rules: Start location: l6 0: l0 -> l1 : i^0'=i^post_1, j^0'=j^post_1, y4^0'=y4^post_1, y6^0'=y6^post_1, y8^0'=y8^post_1, [ 100<=i^0 && j^post_1==100 && i^0==i^post_1 && y4^0==y4^post_1 && y6^0==y6^post_1 && y8^0==y8^post_1 ], cost: 1 1: l0 -> l2 : i^0'=i^post_2, j^0'=j^post_2, y4^0'=y4^post_2, y6^0'=y6^post_2, y8^0'=y8^post_2, [ 1+i^0<=100 && y4^post_2==i^0 && y6^post_2==i^0 && i^post_2==1+i^0 && j^0==j^post_2 && y8^0==y8^post_2 ], cost: 1 5: l1 -> l3 : i^0'=i^post_6, j^0'=j^post_6, y4^0'=y4^post_6, y6^0'=y6^post_6, y8^0'=y8^post_6, [ i^0==i^post_6 && j^0==j^post_6 && y4^0==y4^post_6 && y6^0==y6^post_6 && y8^0==y8^post_6 ], cost: 1 2: l2 -> l0 : i^0'=i^post_3, j^0'=j^post_3, y4^0'=y4^post_3, y6^0'=y6^post_3, y8^0'=y8^post_3, [ i^0==i^post_3 && j^0==j^post_3 && y4^0==y4^post_3 && y6^0==y6^post_3 && y8^0==y8^post_3 ], cost: 1 4: l3 -> l1 : i^0'=i^post_5, j^0'=j^post_5, y4^0'=y4^post_5, y6^0'=y6^post_5, y8^0'=y8^post_5, [ 1+j^0<=200 && y8^post_5==j^0 && j^post_5==1+j^0 && i^0==i^post_5 && y4^0==y4^post_5 && y6^0==y6^post_5 ], cost: 1 6: l5 -> l2 : i^0'=i^post_7, j^0'=j^post_7, y4^0'=y4^post_7, y6^0'=y6^post_7, y8^0'=y8^post_7, [ i^post_7==0 && j^0==j^post_7 && y4^0==y4^post_7 && y6^0==y6^post_7 && y8^0==y8^post_7 ], cost: 1 7: l6 -> l5 : i^0'=i^post_8, j^0'=j^post_8, y4^0'=y4^post_8, y6^0'=y6^post_8, y8^0'=y8^post_8, [ i^0==i^post_8 && j^0==j^post_8 && y4^0==y4^post_8 && y6^0==y6^post_8 && y8^0==y8^post_8 ], cost: 1 Simplified all rules, resulting in: Start location: l6 0: l0 -> l1 : j^0'=100, [ 100<=i^0 ], cost: 1 1: l0 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 1 5: l1 -> l3 : [], cost: 1 2: l2 -> l0 : [], cost: 1 4: l3 -> l1 : j^0'=1+j^0, y8^0'=j^0, [ 1+j^0<=200 ], cost: 1 6: l5 -> l2 : i^0'=0, [], cost: 1 7: l6 -> l5 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l6 0: l0 -> l1 : j^0'=100, [ 100<=i^0 ], cost: 1 1: l0 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 1 9: l1 -> l1 : j^0'=1+j^0, y8^0'=j^0, [ 1+j^0<=200 ], cost: 2 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i^0'=0, [], cost: 2 Accelerating simple loops of location 1. Accelerating the following rules: 9: l1 -> l1 : j^0'=1+j^0, y8^0'=j^0, [ 1+j^0<=200 ], cost: 2 Accelerated rule 9 with backward acceleration, yielding the new rule 10. [accelerate] Nesting with 1 inner and 1 outer candidates Removing the simple loops: 9. Accelerated all simple loops using metering functions (where possible): Start location: l6 0: l0 -> l1 : j^0'=100, [ 100<=i^0 ], cost: 1 1: l0 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 1 10: l1 -> l1 : j^0'=200, y8^0'=199, [ 200-j^0>=1 ], cost: 400-2*j^0 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i^0'=0, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l6 0: l0 -> l1 : j^0'=100, [ 100<=i^0 ], cost: 1 1: l0 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 1 11: l0 -> l1 : j^0'=200, y8^0'=199, [ 100<=i^0 ], cost: 201 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i^0'=0, [], cost: 2 Removed unreachable locations (and leaf rules with constant cost): Start location: l6 1: l0 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 1 2: l2 -> l0 : [], cost: 1 8: l6 -> l2 : i^0'=0, [], cost: 2 Eliminated locations (on linear paths): Start location: l6 12: l2 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 2 8: l6 -> l2 : i^0'=0, [], cost: 2 Accelerating simple loops of location 2. Accelerating the following rules: 12: l2 -> l2 : i^0'=1+i^0, y4^0'=i^0, y6^0'=i^0, [ 1+i^0<=100 ], cost: 2 Accelerated rule 12 with backward acceleration, yielding the new rule 13. [accelerate] Nesting with 1 inner and 1 outer candidates Removing the simple loops: 12. Accelerated all simple loops using metering functions (where possible): Start location: l6 13: l2 -> l2 : i^0'=100, y4^0'=99, y6^0'=99, [ 100-i^0>=1 ], cost: 200-2*i^0 8: l6 -> l2 : i^0'=0, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l6 8: l6 -> l2 : i^0'=0, [], cost: 2 14: l6 -> l2 : i^0'=100, y4^0'=99, y6^0'=99, [], cost: 202 Removed unreachable locations (and leaf rules with constant cost): Start location: l6 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l6 Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Constant Cpx degree: 0 Solved cost: 1 Rule cost: 1 Rule guard: [ i^0==i^post_8 && j^0==j^post_8 && y4^0==y4^post_8 && y6^0==y6^post_8 && y8^0==y8^post_8 ] WORST_CASE(Omega(1),?)