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Proof step 18 from proof junkrefs-put-null-01 (previous step)

st[r0 -- mkfs(class0, ty2, fieldvar0) '] = refval(r2), junkrefs(str, r2 ' + refs, ty2, st[r -- mkfs(class, ty0, fieldvar) ', refval(jvmref)]), is_reftype(ty0), is_obj(str, r0, st[r -- mkfs(class, ty0, fieldvar) ', refval(jvmref)]), st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st), mkfs(class0, ty2, fieldvar0) ' ∈ instfields(st[r0 -- _type] .type .class), ∀ str0, ty1, st0, fs0, r1. ¬ junkrefs(str0, r2 ' + refs, ty1, st0) ∧ is_reftype(fs0 .type) → ¬ junkrefs(str0, r2 ' + refs, ty1, st0[r1 -- fs0 ', refval(jvmref)]), r0 ≠ r ∨ _type ≠ mkfs(class, ty0, fieldvar) ', r0 ≠ r ∨ class0 ≠ class ∨ ty2 ≠ ty0 ∨ fieldvar0 ≠ fieldvar ⊦ r0 = jvmref, mkfs(class0, ty2, fieldvar0) ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_referencevalue(st[r0 -- mkfs(class0, ty2, fieldvar0) ']) ∧ r2 = st[r0 -- mkfs(class0, ty2, fieldvar0) '] .refval ∧ junkrefs(str, st[r0 -- mkfs(class0, ty2, fieldvar0) '] .refval ' + refs, mkfs(class0, ty2, fieldvar0) .type, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
st[r0 -- mkfs(class0, ty2, fieldvar0) '] = refval(r2), mkfs(class0, ty2, fieldvar0) ' ∈ instfields(st[r0 -- _type] .type .class), is_obj(str, r0, st), st[r0 -- _type] .type ≤ ty, is_obj(str, r0, st[r -- mkfs(class, ty0, fieldvar) ', refval(jvmref)]), is_reftype(ty0), junkrefs(str, r2 ' + refs, ty2, st[r -- mkfs(class, ty0, fieldvar) ', refval(jvmref)]), r0 ≠ r ∨ class0 ≠ class ∨ ty2 ≠ ty0 ∨ fieldvar0 ≠ fieldvar, r0 ≠ r ∨ _type ≠ mkfs(class, ty0, fieldvar) ', ∀ str0, ty1, st0, fs0, r1. ¬ junkrefs(str0, r2 ' + refs, ty1, st0) ∧ is_reftype(fs0 .type) → ¬ junkrefs(str0, r2 ' + refs, ty1, st0[r1 -- fs0 ', refval(jvmref)]) ⊦ r0 = jvmref, junkrefs(str, r2 ' + refs, ty2, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ refval(r) .refval = r], [CSIMPSEQ : ⊦ is_referencevalue(refval(r))], [CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty], [CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1])]]