WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l4 0: l0 -> l1 : i!14^0'=i!14^post_1, i!22^0'=i!22^post_1, result!12^0'=result!12^post_1, temp0!15^0'=temp0!15^post_1, [ i!14^1_1==0 && 0<=i!14^1_1 && i!14^1_1<=0 && 0<=i!14^1_1 && i!14^1_1<=0 && 1+i!14^1_1<=10 && i!14^2_1==1+i!14^1_1 && 1<=i!14^2_1 && i!14^2_1<=1 && 1<=i!14^2_1 && i!14^2_1<=1 && 1+i!14^2_1<=10 && i!14^post_1==1+i!14^2_1 && 2<=i!14^post_1 && i!14^post_1<=2 && i!22^0==i!22^post_1 && result!12^0==result!12^post_1 && temp0!15^0==temp0!15^post_1 ], cost: 1 1: l1 -> l2 : i!14^0'=i!14^post_2, i!22^0'=i!22^post_2, result!12^0'=result!12^post_2, temp0!15^0'=temp0!15^post_2, [ 10<=i!14^0 && result!12^post_2==temp0!15^0 && i!14^0==i!14^post_2 && i!22^0==i!22^post_2 && temp0!15^0==temp0!15^post_2 ], cost: 1 2: l1 -> l3 : i!14^0'=i!14^post_3, i!22^0'=i!22^post_3, result!12^0'=result!12^post_3, temp0!15^0'=temp0!15^post_3, [ 1+i!14^0<=10 && i!14^post_3==1+i!14^0 && i!14^post_3<=1+i!22^0 && 1+i!22^0<=i!14^post_3 && 1+i!22^0<=10 && i!22^0==i!22^post_3 && result!12^0==result!12^post_3 && temp0!15^0==temp0!15^post_3 ], cost: 1 3: l3 -> l1 : i!14^0'=i!14^post_4, i!22^0'=i!22^post_4, result!12^0'=result!12^post_4, temp0!15^0'=temp0!15^post_4, [ i!14^0==i!14^post_4 && i!22^0==i!22^post_4 && result!12^0==result!12^post_4 && temp0!15^0==temp0!15^post_4 ], cost: 1 4: l4 -> l0 : i!14^0'=i!14^post_5, i!22^0'=i!22^post_5, result!12^0'=result!12^post_5, temp0!15^0'=temp0!15^post_5, [ i!14^0==i!14^post_5 && i!22^0==i!22^post_5 && result!12^0==result!12^post_5 && temp0!15^0==temp0!15^post_5 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 4: l4 -> l0 : i!14^0'=i!14^post_5, i!22^0'=i!22^post_5, result!12^0'=result!12^post_5, temp0!15^0'=temp0!15^post_5, [ i!14^0==i!14^post_5 && i!22^0==i!22^post_5 && result!12^0==result!12^post_5 && temp0!15^0==temp0!15^post_5 ], cost: 1 Removed unreachable and leaf rules: Start location: l4 0: l0 -> l1 : i!14^0'=i!14^post_1, i!22^0'=i!22^post_1, result!12^0'=result!12^post_1, temp0!15^0'=temp0!15^post_1, [ i!14^1_1==0 && 0<=i!14^1_1 && i!14^1_1<=0 && 0<=i!14^1_1 && i!14^1_1<=0 && 1+i!14^1_1<=10 && i!14^2_1==1+i!14^1_1 && 1<=i!14^2_1 && i!14^2_1<=1 && 1<=i!14^2_1 && i!14^2_1<=1 && 1+i!14^2_1<=10 && i!14^post_1==1+i!14^2_1 && 2<=i!14^post_1 && i!14^post_1<=2 && i!22^0==i!22^post_1 && result!12^0==result!12^post_1 && temp0!15^0==temp0!15^post_1 ], cost: 1 2: l1 -> l3 : i!14^0'=i!14^post_3, i!22^0'=i!22^post_3, result!12^0'=result!12^post_3, temp0!15^0'=temp0!15^post_3, [ 1+i!14^0<=10 && i!14^post_3==1+i!14^0 && i!14^post_3<=1+i!22^0 && 1+i!22^0<=i!14^post_3 && 1+i!22^0<=10 && i!22^0==i!22^post_3 && result!12^0==result!12^post_3 && temp0!15^0==temp0!15^post_3 ], cost: 1 3: l3 -> l1 : i!14^0'=i!14^post_4, i!22^0'=i!22^post_4, result!12^0'=result!12^post_4, temp0!15^0'=temp0!15^post_4, [ i!14^0==i!14^post_4 && i!22^0==i!22^post_4 && result!12^0==result!12^post_4 && temp0!15^0==temp0!15^post_4 ], cost: 1 4: l4 -> l0 : i!14^0'=i!14^post_5, i!22^0'=i!22^post_5, result!12^0'=result!12^post_5, temp0!15^0'=temp0!15^post_5, [ i!14^0==i!14^post_5 && i!22^0==i!22^post_5 && result!12^0==result!12^post_5 && temp0!15^0==temp0!15^post_5 ], cost: 1 Simplified all rules, resulting in: Start location: l4 0: l0 -> l1 : i!14^0'=2, [], cost: 1 2: l1 -> l3 : i!14^0'=1+i!14^0, [ 1+i!14^0<=10 && -i!22^0+i!14^0==0 ], cost: 1 3: l3 -> l1 : [], cost: 1 4: l4 -> l0 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l4 6: l1 -> l1 : i!14^0'=1+i!14^0, [ 1+i!14^0<=10 && -i!22^0+i!14^0==0 ], cost: 2 5: l4 -> l1 : i!14^0'=2, [], cost: 2 Accelerating simple loops of location 1. Accelerating the following rules: 6: l1 -> l1 : i!14^0'=1+i!14^0, [ 1+i!14^0<=10 && -i!22^0+i!14^0==0 ], cost: 2 Failed to prove monotonicity of the guard of rule 6. [accelerate] Nesting with 1 inner and 1 outer candidates Accelerated all simple loops using metering functions (where possible): Start location: l4 6: l1 -> l1 : i!14^0'=1+i!14^0, [ 1+i!14^0<=10 && -i!22^0+i!14^0==0 ], cost: 2 5: l4 -> l1 : i!14^0'=2, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l4 5: l4 -> l1 : i!14^0'=2, [], cost: 2 7: l4 -> l1 : i!14^0'=3, [ 2-i!22^0==0 ], cost: 4 Removed unreachable locations (and leaf rules with constant cost): Start location: l4 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l4 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!14^0==i!14^post_5 && i!22^0==i!22^post_5 && result!12^0==result!12^post_5 && temp0!15^0==temp0!15^post_5 ] WORST_CASE(Omega(1),?)