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Proof step 21 from proof nosharing-forward (previous step)

∀ st, sks0, r0, r, class, str, ty, fs. st[jvmref -- sks0] = refval(r0) ∧ st[r -- _type] .type = mkclasstype(class) ∧ st[jvmref -- sks1] = refval(r0) ∧ fits(jvmref, sks1, st) ∧ fits(jvmref, sks0, st) ∧ validref(str, r, ty, st) ∧ fs ' ∈ instfields(class) → r = jvmref ∨ sks0 = sks1 ∨ sks0 = [] ∨ sks1 = [] ∨ r0 = jvmref ∨ is_referencevalue(st[r -- fs ']), st[jvmref -- sks0] = refval(r0), st[r -- _type] .type = mkclasstype(class), st[jvmref -- (sk + sks1)] = refval(r0), fits(jvmref, sk + sks1, st), fits(jvmref, sks0, st), validref(str, r, ty, st), fs ' ∈ instfields(class) ⊦ r = jvmref, sks0 = sk + sks1, sks0 = [], sk + sks1 = [], r0 = jvmref, is_referencevalue(st[r -- fs '])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
st[jvmref -- sks0] = refval(r0), st[r -- _type] .type = mkclasstype(class), st[jvmref -- (sk ' + sks1)] = refval(r0), fits(jvmref, sks0, st), validref(str, r, ty, st), fs ' ∈ instfields(class), fits(jvmref, sk ' + sks1, st), ∀ st, sks0, r0, r, class, str, ty, fs. st[jvmref -- sks0] = refval(r0) ∧ st[r -- _type] .type = mkclasstype(class) ∧ st[jvmref -- sks1] = refval(r0) ∧ fits(jvmref, sks1, st) ∧ fits(jvmref, sks0, st) ∧ validref(str, r, ty, st) ∧ fs ' ∈ instfields(class) → r = jvmref ∨ sks0 = sks1 ∨ sks0 = [] ∨ sks1 = [] ∨ r0 = jvmref ∨ is_referencevalue(st[r -- fs ']) ⊦ sks0 = [], r0 = jvmref, r = jvmref, sks0 = sk ' + sks1, is_referencevalue(st[r -- fs '])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (sks + sks0) + sks1 = sks + sks0 + sks1], [CSIMPSEQ : ⊦ sk ' + sks ≠ []], [CSIMPSEQ : ⊦ sk + sks = sk ' + sks])]]