fix syntax

nptav2maude/src/Parser.py

@@ -123,7 +123,7 @@ class InterpreterParser:
         locations_str = self.maude.operators(locations, [], "Location", ["ctor"])
 
         # actions
-        actions = sorted(model.actions)
+        actions = sorted(model.actions + ["noaction"])
         actions_str = self.maude.operators(actions, [], "Action", ["ctor"])
 
         # automata label
@@ -236,7 +236,12 @@ class InterpreterParser:
 
         # sync
         actions = t.sync
-        sync_str = f"sync {actions}" if actions in sync_actions else f"local {actions}"
+        if actions is None:
+            sync_str = "local noaction"
+        else:
+            sync_str = (
+                f"sync {actions}" if actions in sync_actions else f"local {actions}"
+            )
 
         # guard
         guard = self._normalize_constraints(t.guard)

nptav2maude/tests/examples/coffee-intrpr.maude

@@ -4,7 +4,7 @@ mod MODEL is
    extending ANALYSIS .
 
    ops cdone idle preparing sugar : -> Location [ctor] .
-   ops coffee cup press sleep : -> Action [ctor] .
+   ops coffee cup noaction press sleep : -> Action [ctor] .
    op machine : -> AutoId [ctor] .
    ops x y : -> Clock [ctor] .
    ops p1 p2 p3 : -> Parameter [ctor] .

nptav2maude/tests/examples/fischer-intrpr.maude

@@ -4,7 +4,7 @@ mod MODEL is
   extending ANALYSIS .
 
  ops active1 active2 check1 check2 cs1 cs2 idle1 idle2 locaccess1 locaccess2 obs1 obs2 obsviolation obswaiting : -> Location [ctor] .
- ops access1 access2 enter1 enter2 exit1 exit2 noaccess1 noaccess2 try1 try2 update1 update2 : -> Action [ctor] .
+ ops access1 access2 enter1 enter2 exit1 exit2 noaccess1 noaccess2 noaction try1 try2 update1 update2 : -> Action [ctor] .
  ops observer proc1 proc2 : -> AutoId [ctor] .
  ops x1 x2 : -> Clock [ctor] .
  op turn : -> DVariable [ctor] .

nptav2maude/tests/examples/train-intruder-intrpr.maude

@@ -4,7 +4,7 @@ mod MODEL is
   extending ANALYSIS .
 
  ops approaching choosing crash down emergencylowering far gone initgate inittrain intruderdone lowering nopower up verynear waiting walkinghouse walkingsensor : -> Location [ctor] .
- ops breaksensor choosehouse choosesensor endlowering noactiongate noactiontrain pass powercut sensorclose sensorfar startlowering : -> Action [ctor] .
+ ops breaksensor choosehouse choosesensor endlowering noaction pass powercut sensorclose sensorfar startlowering : -> Action [ctor] .
  ops gate intruder train : -> AutoId [ctor] .
  ops xgate xintruder xtrain : -> Clock [ctor] .
  ops choice gatedown sensoractive start : -> DVariable [ctor] .
@@ -13,9 +13,9 @@ mod MODEL is
  op Train : -> Automaton .
  eq Train = < train |
                   (@ inittrain inv true :
-                   (when (start = 1) local noactiontrain do { nothing } goto far)),
+                   (when (start = 1) local noaction do { nothing } goto far)),
                   (@ far inv (xtrain <= pfar) :
-                     (when ((xtrain = pfar) and (sensoractive = 0)) local noactiontrain do { xtrain := 0 } goto approaching ,
+                     (when ((xtrain = pfar) and (sensoractive = 0)) local noaction do { xtrain := 0 } goto approaching ,
                      when ((xtrain = pfar) and (sensoractive = 1)) sync sensorfar do { xtrain := 0 } goto approaching)),
                   (@ approaching inv (xtrain <= papproaching) :
                     (when (xtrain = papproaching) sync sensorclose do { nothing } goto verynear)),
@@ -41,7 +41,7 @@ mod MODEL is
  op Gate : -> Automaton .
  eq Gate = < gate |
              (@ initgate inv true :
-              (when (start = 1) local noactiongate do { nothing } goto up)),
+              (when (start = 1) local noaction do { nothing } goto up)),
              (@ up inv true :
                (when true sync pass do { xgate := 0 } goto up ,
                 when true sync sensorclose do { xgate := 0 } goto emergencylowering ,

nptav2maude/tests/examples/train-intruder.imi

@@ -7,13 +7,13 @@ var
 (************************************************************)
  automaton train
 (************************************************************)
-synclabs : sensorfar, sensorclose, pass, noactiontrain;
+synclabs : sensorfar, sensorclose, pass;
 
 loc inittrain : invariant True
-  when start = 1 sync noactiontrain goto far ;
+  when start = 1  goto far ;
 
 loc far : invariant xtrain <= pfar
-  when xtrain = pfar & sensoractive = 0 sync noactiontrain do { xtrain := 0 } goto approaching ;
+  when xtrain = pfar & sensoractive = 0 do { xtrain := 0 } goto approaching ;
   when xtrain = pfar & sensoractive = 1 sync sensorfar do { xtrain := 0} goto approaching ;
 
 loc approaching : invariant xtrain <= papproaching
@@ -52,11 +52,11 @@ end (* intruder *)
 (************************************************************)
  automaton gate
 (************************************************************)
-synclabs : noactiongate, pass, sensorclose, powercut, sensorfar, startlowering, endlowering ;
+synclabs : pass, sensorclose, powercut, sensorfar, startlowering, endlowering ;
 
 
 loc initgate : invariant True
-  when start = 1 sync noactiongate goto up ;
+  when start = 1 goto up ;
 
 loc up : invariant True
   when True sync pass do {xgate:=0} goto up ;