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Proof step 20 from proof same-subclasses-is-array (previous step)

has_classtype(st[r -- _type] .type), ¬ has_classtype(st[r -- _type] .type) ∨ tdname+∃(str0, st[r -- _type] .type .jtclass), same-subclasses(st[r -- _type] .type .jtelemtype .class, str, str0), is_array(r, st) ⊦ st[r -- _type] .type .jtelemtype = abstract_type, st[r -- _type] .type .jtelemtype = void_type, tdname+∃(str, st[r -- _type] .type .jtelemtype .class)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
has_classtype(st[r -- _type] .type), same-subclasses(st[r -- _type] .type .jtelemtype .class, str, str0), is_array(r, st), tdname+∃(str0, st[r -- _type] .type .jtelemtype .class) ⊦ st[r -- _type] .type .jtelemtype = abstract_type, st[r -- _type] .type .jtelemtype = void_type, tdname+∃(str, st[r -- _type] .type .jtelemtype .class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ty .jtclass = ty .jtelemtype .class])]]