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p01-phil2.pddl
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;; This problem instance specifies a
;; particular communication protocol
;; that is compiled from Promela source
;; (c) Stefan Edelkamp, 2004
(define (problem instance)
(:domain protocol)
(:objects
;; available processes
philosopher-0
philosopher-1
- process
;; available comunication channels
forks-0-
forks-1-
- queue
;; available comunication channels types
queue-1
- queuetype
;; available queue cells
qs-0
- queue-state
;; available message types
empty
fork
- message
;; available number tags
zero
one
- number_
;; available process types
philosopher
- proctype
;; possible local states
state-1
state-6
state-3
state-4
state-5
- state
;; possible state transitions
forks--pid-Wfork
forks--pid-Rfork
forks-__-pidp1__2_-Rfork
forks-__-pidp1__2_-Wfork
- transition
)
(:init
(queue-next queue-1 qs-0 qs-0)
(is-not-max queue-1 zero)
(is-max queue-1 one)
;; process declaration: activeness, start state, type
(pending philosopher-0)
(at-process philosopher-0 state-1)
(is-a-process philosopher-0 philosopher)
(pending philosopher-1)
(at-process philosopher-1 state-1)
(is-a-process philosopher-1 philosopher)
;; numerics
(is-zero zero)
(dec one zero)
(inc zero one)
(is-not-zero one)
;; queue configuration
(is-a-queue forks-0- queue-1)
(queue-head forks-0- qs-0)
(queue-tail forks-0- qs-0)
(queue-head-msg forks-0- empty)
(queue-size forks-0- zero)
(settled forks-0-)
(is-a-queue forks-1- queue-1)
(queue-head forks-1- qs-0)
(queue-tail forks-1- qs-0)
(queue-head-msg forks-1- empty)
(queue-size forks-1- zero)
(settled forks-1-)
;; special operations
;; queue access operations
(writes philosopher-0 forks-0- forks--pid-Wfork)
(trans-msg forks--pid-Wfork fork)
(reads philosopher-0 forks-0- forks--pid-Rfork)
(trans-msg forks--pid-Rfork fork)
(reads philosopher-0 forks-1- forks-__-pidp1__2_-Rfork)
(trans-msg forks-__-pidp1__2_-Rfork fork)
(writes philosopher-0 forks-1- forks-__-pidp1__2_-Wfork)
(trans-msg forks-__-pidp1__2_-Wfork fork)
(writes philosopher-1 forks-1- forks--pid-Wfork)
(reads philosopher-1 forks-1- forks--pid-Rfork)
(reads philosopher-1 forks-0- forks-__-pidp1__2_-Rfork)
(writes philosopher-1 forks-0- forks-__-pidp1__2_-Wfork)
;; state transition function: state x trans -> state
(trans philosopher forks--pid-Wfork state-1 state-6)
(trans philosopher forks--pid-Rfork state-6 state-3)
(trans philosopher forks-__-pidp1__2_-Rfork state-3 state-4)
(trans philosopher forks--pid-Wfork state-4 state-5)
(trans philosopher forks-__-pidp1__2_-Wfork state-5 state-6)
)
(:goal
(and
;; deadlock, all local processes are blocked
(blocked philosopher-0)
(blocked philosopher-1)
)
)
)