Initial Problem
Start: l0
Program_Vars: X₀, X₁
Temp_Vars:
Locations: l0, l1
Transitions:
t₀: l0(X₀, X₁) → l1(X₀, X₁) :|: 1 ≤ X₀ ∧ X₁+1 ≤ 0
t₁: l1(X₀, X₁) → l1(X₀-X₁, X₁) :|: X₁+1 ≤ X₀ ∧ X₁+1 ≤ 0
Preprocessing
Found invariant 1+X₁ ≤ 0 ∧ 2+X₁ ≤ X₀ ∧ 1 ≤ X₀ for location l1
Problem after Preprocessing
Start: l0
Program_Vars: X₀, X₁
Temp_Vars:
Locations: l0, l1
Transitions:
t₀: l0(X₀, X₁) → l1(X₀, X₁) :|: 1 ≤ X₀ ∧ X₁+1 ≤ 0
t₁: l1(X₀, X₁) → l1(X₀-X₁, X₁) :|: X₁+1 ≤ X₀ ∧ X₁+1 ≤ 0 ∧ 1+X₁ ≤ 0 ∧ 2+X₁ ≤ X₀ ∧ 1 ≤ X₀
Solv. Size Bound: t₁: l1→l1 for X₀
cycle: [t₁: l1→l1]
loop: (X₁+1 ≤ X₀ ∧ X₁+1 ≤ 0,(X₀,X₁) -> (X₀-X₁,X₁)
overappr. closed-form: X₁⋅n+X₀ {O(n^2)}
runtime bound: inf {Infinity}
Solv. Size Bound - Lifting for t₁: l1→l1 and X₀: inf {Infinity}
Solv. Size Bound - Lifting for t₁: l1→l1 and X₀: inf {Infinity}
Analysing control-flow refined program
Found invariant 1+X₁ ≤ 0 ∧ 2+X₁ ≤ X₀ ∧ 1 ≤ X₀ for location l1
Found invariant 1+X₁ ≤ 0 ∧ 3+X₁ ≤ X₀ ∧ 1 ≤ X₀+X₁ ∧ 2 ≤ X₀ for location n_l1___1
Solv. Size Bound: t₂₅: n_l1___1→n_l1___1 for X₀
cycle: [t₂₅: n_l1___1→n_l1___1]
loop: (1 ≤ X₀+X₁,(X₀,X₁) -> (X₀-X₁,X₁)
overappr. closed-form: X₁⋅n+X₀ {O(n^2)}
runtime bound: inf {Infinity}
Solv. Size Bound - Lifting for t₂₅: n_l1___1→n_l1___1 and X₀: inf {Infinity}
Solv. Size Bound - Lifting for t₂₅: n_l1___1→n_l1___1 and X₀: inf {Infinity}
CFR did not improve the program. Rolling back
CFR did not improve the program. Rolling back
All Bounds
Timebounds
Overall timebound:inf {Infinity}
t₀: 1 {O(1)}
t₁: inf {Infinity}
Costbounds
Overall costbound: inf {Infinity}
t₀: 1 {O(1)}
t₁: inf {Infinity}
Sizebounds
t₀, X₀: X₀ {O(n)}
t₀, X₁: X₁ {O(n)}
t₁, X₁: X₁ {O(n)}