We propose a program specialization technique for locally stratified CLP(Z) programs, that is, logic programs with linear constraints over the set Z of the integer numbers. For reasons of efficiency our technique makes use of a relaxation from integers to reals. We reformulate the familiar unfold/fold transformation rules for CLP programs so that: (i) the applicability conditions of the rules are based on the satisfiability or entailment of constraints over the set R of the real numbers, and (ii) every application of the rules transforms a given program into a new program with the same perfect model constructed over Z. Then, we introduce a strategy which applies the transformation rules for specializing CLP(Z) programs with respect to a given query. Finally, we show that our specialization strategy can be applied for verifying properties of infinite state reactive systems specified by constraints over Z.
Using Real Relaxations During Program Specialization
Proietti M;
2012
Abstract
We propose a program specialization technique for locally stratified CLP(Z) programs, that is, logic programs with linear constraints over the set Z of the integer numbers. For reasons of efficiency our technique makes use of a relaxation from integers to reals. We reformulate the familiar unfold/fold transformation rules for CLP programs so that: (i) the applicability conditions of the rules are based on the satisfiability or entailment of constraints over the set R of the real numbers, and (ii) every application of the rules transforms a given program into a new program with the same perfect model constructed over Z. Then, we introduce a strategy which applies the transformation rules for specializing CLP(Z) programs with respect to a given query. Finally, we show that our specialization strategy can be applied for verifying properties of infinite state reactive systems specified by constraints over Z.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
