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In this paper, we review existing points-to Separation Logics for dynamicmemory reasoning and we find that different usages of heap separation tend tobe an obstacle. Hence, two total and strict spatial heap operations areproposed upon heap graphs, for conjunction and disjunction -- similar tological conjuncts. Heap conjunction implies that there exists a free heapvertex to connect to or an explicit destination vertex is provided.Essentially, Burstall's properties do not change. By heap we refer to anarbitrary simple directed graph, which is finite and may contain compositevertices representing class objects. Arbitrary heap memory access isrestricted, as well as type punning, late class binding and furtherrestrictions. Properties of the new logic are investigated, and as a resultgroup properties are shown. Both expecting and superficial heaps arespecifiable. Equivalence transformations may make denotated heaps inconsistent,although those may be detected and patched by the two generic linearcanonization steps presented. The properties help to motivate a later fullintroduction of a set of equivalences over heap for future work. Partial heapsare considered as a useful specification technique that help to reduceincompleteness issues with specifications. Finally, the logic proposed may beconsidered for extension for the Object Constraint Language.

A Non-repetitive Logic for Verification of Dynamic Memory with Explicit Heap Conjunction and Disjunction