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Proof step 18 from proof validrefs-delcycle (previous step)

st[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), acc + r ' = r1 ' + refs, refs1 .last = jvmref, validrefs(str, acc + r ' + refs0 + r ' + refs1, ty0, st), mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r0 -- _type] .type .class), st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st), ∀ str, r, refs0, refs1, ty, st. validrefs(str, acc + r ' + refs0 + r ' + refs1, ty, st) ∧ refs1 ≠ [] ∧ refs1 .last = jvmref → validrefs(str, acc + r ' + refs1, ty, st) ⊦ refs1 = [], r0 = jvmref, ¬ r1 ∈ acc ∧ r1 ≠ r, r ≠ r1 ∧ ¬ r ∈ refs, ∃ fs. fs ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- fs ']) ∧ r1 = st[r0 -- fs '] .refval ∧ validrefs(str, acc + r ' + refs1, fs .type, st)

User applied rule exists right

And obtained the following new goals

Proof step 17:
st[r0 -- mkfs(class, ty0, fieldvar) '] = refval(r1), acc + r ' = r1 ' + refs, refs1 .last = jvmref, validrefs(str, acc + r ' + refs0 + r ' + refs1, ty0, st), mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r0 -- _type] .type .class), st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st), ∀ str, r, refs0, refs1, ty, st. validrefs(str, acc + r ' + refs0 + r ' + refs1, ty, st) ∧ refs1 ≠ [] ∧ refs1 .last = jvmref → validrefs(str, acc + r ' + refs1, ty, st) ⊦ refs1 = [], r0 = jvmref, ¬ r1 ∈ acc ∧ r1 ≠ r, r ≠ r1 ∧ ¬ r ∈ refs, mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- mkfs(class, ty0, fieldvar) ']) ∧ r1 = st[r0 -- mkfs(class, ty0, fieldvar) '] .refval ∧ validrefs(str, acc + r ' + refs1, mkfs(class, ty0, fieldvar) .type, st)

Rule argument

[EXRARG : pos: right 5, [extquanttermlist: (mkfs(class, ty0, fieldvar)) abort:F , discard:T , computed:T ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (mkfs(class, ty0, fieldvar))]]