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Proof step 7 from proof reachless-succ-edge (conclusion)

⊦ b ∈ succ(a) ∧ reach(source, a, n0) → (¬ reach<(source, b, n0 + 2) ↔ false)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
reach(source, a, n0), b ∈ succ(a) ⊦ succ(a) = ∅, # succ(a) = 0, reach<(source, b, n0 + 2)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ s ≠ ∅ → # s ≠ 0], [CSIMPFORWARD : ⊦ a ∈ s → s ≠ ∅])]]