Initial Problem

Start: l0
Program_Vars: X₀, X₁
Temp_Vars:
Locations: l0, l1, l2, l3, l4, l5
Transitions:
t₀: l0(X₀, X₁) → l2(X₀, X₁)
t₂: l1(X₀, X₁) → l3(X₀, X₁) :|: 0 < X₀
t₃: l1(X₀, X₁) → l4(X₀, X₁) :|: X₀ ≤ 0
t₁: l2(X₀, X₁) → l1(X₁, X₁)
t₄: l3(X₀, X₁) → l1(X₀+1, X₁) :|: 3 < X₀
t₅: l3(X₀, X₁) → l1(X₀-1, X₁) :|: X₀ ≤ 3
t₆: l4(X₀, X₁) → l5(X₀, X₁)

Preprocessing

Found invariant X₀ ≤ 0 for location l5

Found invariant X₀ ≤ 0 for location l4

Found invariant 1 ≤ X₀ for location l3

Problem after Preprocessing

Start: l0
Program_Vars: X₀, X₁
Temp_Vars:
Locations: l0, l1, l2, l3, l4, l5
Transitions:
t₀: l0(X₀, X₁) → l2(X₀, X₁)
t₂: l1(X₀, X₁) → l3(X₀, X₁) :|: 0 < X₀
t₃: l1(X₀, X₁) → l4(X₀, X₁) :|: X₀ ≤ 0
t₁: l2(X₀, X₁) → l1(X₁, X₁)
t₄: l3(X₀, X₁) → l1(X₀+1, X₁) :|: 3 < X₀ ∧ 1 ≤ X₀
t₅: l3(X₀, X₁) → l1(X₀-1, X₁) :|: X₀ ≤ 3 ∧ 1 ≤ X₀
t₆: l4(X₀, X₁) → l5(X₀, X₁) :|: X₀ ≤ 0

Analysing control-flow refined program

Cut unsatisfiable transition t₁₃₅: n_l1___4→l4

Found invariant 1+X₁ ≤ X₀ ∧ 4 ≤ X₁ ∧ 9 ≤ X₀+X₁ ∧ 5 ≤ X₀ for location n_l1___4

Found invariant X₁ ≤ X₀ ∧ 1 ≤ X₁ ∧ 2 ≤ X₀+X₁ ∧ X₀ ≤ X₁ ∧ 1 ≤ X₀ for location n_l3___5

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 5 ∧ 1 ≤ X₁ ∧ 1 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 0 ≤ X₀ for location n_l1___3

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 3 ∧ X₀ ≤ X₁ ∧ X₀ ≤ 0 for location l5

Found invariant 1+X₁ ≤ X₀ ∧ 4 ≤ X₁ ∧ 9 ≤ X₀+X₁ ∧ 5 ≤ X₀ for location n_l3___2

Found invariant X₁ ≤ X₀ ∧ X₀ ≤ X₁ for location l1

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 3 ∧ X₀ ≤ X₁ ∧ X₀ ≤ 0 for location l4

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 2+X₀ ∧ X₀+X₁ ≤ 5 ∧ 2 ≤ X₁ ∧ 3 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 1 ≤ X₀ for location n_l3___1

Found invariant 1+X₁ ≤ X₀ ∧ 4 ≤ X₁ ∧ 9 ≤ X₀+X₁ ∧ 5 ≤ X₀ for location n_l1___4

Found invariant X₁ ≤ X₀ ∧ 1 ≤ X₁ ∧ 2 ≤ X₀+X₁ ∧ X₀ ≤ X₁ ∧ 1 ≤ X₀ for location n_l3___5

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 5 ∧ 1 ≤ X₁ ∧ 1 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 0 ≤ X₀ for location n_l1___3

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 3 ∧ X₀ ≤ X₁ ∧ X₀ ≤ 0 for location l5

Found invariant 1+X₁ ≤ X₀ ∧ 4 ≤ X₁ ∧ 9 ≤ X₀+X₁ ∧ 5 ≤ X₀ for location n_l3___2

Found invariant X₁ ≤ X₀ ∧ X₀ ≤ X₁ for location l1

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 3 ∧ X₀ ≤ X₁ ∧ X₀ ≤ 0 for location l4

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 2+X₀ ∧ X₀+X₁ ≤ 5 ∧ 2 ≤ X₁ ∧ 3 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 1 ≤ X₀ for location n_l3___1

Time-Bound by TWN-Loops:

TWN-Loops: t₁₂₁ 44 {O(1)}

TWN-Loops:

entry: t₁₂₆: n_l3___5(X₀, X₁) → n_l1___3(X₀-1, X₁) :|: 0 < X₀ ∧ X₀ ≤ X₁ ∧ X₁ ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 3 ∧ X₁ ≤ X₀ ∧ 1 ≤ X₁ ∧ 2 ≤ X₀+X₁ ∧ X₀ ≤ X₁ ∧ 1 ≤ X₀
results in twn-loop: twn:Inv: [X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 5 ∧ 1 ≤ X₁ ∧ 1 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 0 ≤ X₀ ∧ X₁ ≤ 3 ∧ X₁ ≤ 2+X₀ ∧ X₀+X₁ ≤ 5 ∧ 2 ≤ X₁ ∧ 3 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 1 ≤ X₀] , (X₀,X₁) -> (X₀-1,X₁) :|: X₀ ≤ 3 ∧ 0 ≤ X₀ ∧ X₀ ≤ 2 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 0 < X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 3
order: [X₀; X₁]
closed-form:
X₀: X₀ + [[n != 0]] * -1 * n^1
X₁: X₁

Termination: true
Formula:

0 < 1 ∧ 1 < 0
∨ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ 0 < 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ 0 < 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 1 < 0 ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ 0 < 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 < 0 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ 0 < 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 < 0 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 1 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ 1 < X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 1 < X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ 0 < 1 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ 0 < 1 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 1 < X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ 1 < X₀ ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 1 < X₀ ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ 0 < 1 ∧ 1 < X₀ ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 < X₀ ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ 0 < 1 ∧ 1 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ 0 < 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < 0 ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < 0 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < 0 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ < 3 ∧ 1 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ < 3 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 0 < 1 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < 0 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 < X₀ ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 1 < 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 < 1 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < 1 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 0 < 1 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ < 2 ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ < 2 ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ 0 ≤ 1 ∧ 1 ≤ 0 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 < 0
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 0 < X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1
∨ X₀ ≤ 3 ∧ 3 ≤ X₀ ∧ 1 ≤ X₀ ∧ X₀ ≤ 1 ∧ 0 < X₀ ∧ X₀ ≤ 2 ∧ 2 ≤ X₀ ∧ 1 ≤ 0 ∧ 0 ≤ 1 ∧ 0 ≤ X₀ ∧ X₀ ≤ 0

Stabilization-Threshold for: X₀ ≤ 3
alphas_abs: 3+X₀
M: 0
N: 1
Bound: 2⋅X₀+8 {O(n)}
Stabilization-Threshold for: 1 ≤ X₀
alphas_abs: 1+X₀
M: 0
N: 1
Bound: 2⋅X₀+4 {O(n)}
Stabilization-Threshold for: 0 < X₀
alphas_abs: X₀
M: 0
N: 1
Bound: 2⋅X₀+2 {O(n)}
Stabilization-Threshold for: X₀ ≤ 2
alphas_abs: 2+X₀
M: 0
N: 1
Bound: 2⋅X₀+6 {O(n)}
Stabilization-Threshold for: 0 ≤ X₀
alphas_abs: X₀
M: 0
N: 1
Bound: 2⋅X₀+2 {O(n)}

relevant size-bounds w.r.t. t₁₂₆:
X₀: 2 {O(1)}
Runtime-bound of t₁₂₆: 1 {O(1)}
Results in: 44 {O(1)}

44 {O(1)}

Time-Bound by TWN-Loops:

TWN-Loops: t₁₂₄ 44 {O(1)}

relevant size-bounds w.r.t. t₁₂₆:
X₀: 2 {O(1)}
Runtime-bound of t₁₂₆: 1 {O(1)}
Results in: 44 {O(1)}

44 {O(1)}

Found invariant 1+X₁ ≤ X₀ ∧ 4 ≤ X₁ ∧ 9 ≤ X₀+X₁ ∧ 5 ≤ X₀ for location n_l1___4

Found invariant X₁ ≤ X₀ ∧ 1 ≤ X₁ ∧ 2 ≤ X₀+X₁ ∧ X₀ ≤ X₁ ∧ 1 ≤ X₀ for location n_l3___5

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 5 ∧ 1 ≤ X₁ ∧ 1 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 0 ≤ X₀ for location n_l1___3

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 3 ∧ X₀ ≤ X₁ ∧ X₀ ≤ 0 for location l5

Found invariant 1+X₁ ≤ X₀ ∧ 4 ≤ X₁ ∧ 9 ≤ X₀+X₁ ∧ 5 ≤ X₀ for location n_l3___2

Found invariant X₁ ≤ X₀ ∧ X₀ ≤ X₁ for location l1

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 3+X₀ ∧ X₀+X₁ ≤ 3 ∧ X₀ ≤ X₁ ∧ X₀ ≤ 0 for location l4

Found invariant X₁ ≤ 3 ∧ X₁ ≤ 2+X₀ ∧ X₀+X₁ ≤ 5 ∧ 2 ≤ X₁ ∧ 3 ≤ X₀+X₁ ∧ 1+X₀ ≤ X₁ ∧ X₀ ≤ 2 ∧ 1 ≤ X₀ for location n_l3___1

CFR did not improve the program. Rolling back

All Bounds

Timebounds

Overall timebound:inf {Infinity}
t₀: 1 {O(1)}
t₂: inf {Infinity}
t₃: 1 {O(1)}
t₁: 1 {O(1)}
t₄: inf {Infinity}
t₅: inf {Infinity}
t₆: 1 {O(1)}

Costbounds

Overall costbound: inf {Infinity}
t₀: 1 {O(1)}
t₂: inf {Infinity}
t₃: 1 {O(1)}
t₁: 1 {O(1)}
t₄: inf {Infinity}
t₅: inf {Infinity}
t₆: 1 {O(1)}

Sizebounds

t₀, X₀: X₀ {O(n)}
t₀, X₁: X₁ {O(n)}
t₂, X₁: X₁ {O(n)}
t₃, X₀: X₁+2 {O(n)}
t₃, X₁: 2⋅X₁ {O(n)}
t₁, X₀: X₁ {O(n)}
t₁, X₁: X₁ {O(n)}
t₄, X₁: X₁ {O(n)}
t₅, X₀: 2 {O(1)}
t₅, X₁: X₁ {O(n)}
t₆, X₀: X₁+2 {O(n)}
t₆, X₁: 2⋅X₁ {O(n)}