We introduce an extension of Hoare logic for imperative higher-order functions with local state. Local state may be generated dynamically and exported outside its scope, may store higher-order functions, and may be used to construct complex shared mutable data structures. The induced behaviour is captured with a first order predicate which asserts reachability of reference names. The logic enjo...

This paper presents a new definition for Plans The objects defined are called Plan Nets, and are similar in spirit to Sacerdoti's Procedural Nets (1975) It is argued that Plan Nets are more descriptive tham Procedural Nets, because they can easily describe iterative behaviour The Plan Net definition is motivated by providing an operational semantics for the Procedural Net, and noticing that all...