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Proof step 1 from proof one-inf (conclusion)

⊦ str ' ∈ fnode(fid) ↔ false

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ p ∈ fnode(fid) ↔ p = ε

Rule argument

Additional information

Used simplifier rules: fnode-notin: ⊦ p ∈ fnode(fid) ↔ p = ε;% ⊦ str ' ≠ ε; (s)