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Proof step 120 from proof validrefs-lastelem (previous step)

r0 ≠ jvmref, validrefs(str, r0 ' + acc, ty, st), validrefs(str, (r0 ' + acc) + r ', ty, st), ∀ str, ty, st, r. validrefs(str, acc, ty, st) ∧ validrefs(str, acc + r ', ty, st) → acc = [] ∨ has_reffield(acc .last, st) ⊦ has_reffield((r0 ' + acc) .last, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 119:
validrefs(str, (r0 ' + acc) + r ', ty, st), validrefs(str, r0 ' + acc, ty, st), ∀ str, ty, st, r. validrefs(str, acc, ty, st) ∧ validrefs(str, acc + r ', ty, st) → acc = [] ∨ has_reffield(acc .last, st) ⊦ r0 = jvmref, has_reffield((r0 ' + acc) .last, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]