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Proof step 4 from proof validrefs-null-02 (conclusion)

⊦ validrefs(str, jvmref ' + refs, ty, st) ↔ refs = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ validrefs(str, jvmref ', ty, st)
Proof step 3:
validrefs(str, jvmref ' + refs, ty, st) ⊦ refs = []

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ refs + [] = refs])]]