| fs[ri[key]] = truncnode(key0, m), ri-cons(ri, fs), key ∈ ri ⊦ |
fs[ri[key]] = truncnode(key0, m), key ∈ ri, ∀ key. key ∈ ri → ri[key] ∈ fs ∧ key-cons(key, fs[ri[key]]) ⊦
Used simplifier rules: ri-cons: ⊦ ri-cons(ri, fs) ↔ (∀ key. key ∈ ri → ri[key] ∈ fs ∧ key-cons(key, fs[ri[key]]));