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44 lines
1.0 KiB
44 lines
1.0 KiB
// Israeli-Jalfon algorithm
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// dxp/gxn 10/06/02
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// token of size 7
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nondeterministic
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// variables to represent whether a process has a token or not
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// note they are global because they can be updated by other processes
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global q1 : [0..1];
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global q2 : [0..1];
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global q3 : [0..1];
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global q4 : [0..1];
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global q5 : [0..1];
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global q6 : [0..1];
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global q7 : [0..1];
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// module of process 1
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module process1
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[] (q1=1) -> 0.5 : (q1'=0) & (q7'=1) + 0.5 : (q1'=0) & (q2'=1);
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endmodule
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// add further processes through renaming
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module process2 =process1[q1=q2 ,q2=q3 ,q7=q1] endmodule
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module process3 =process1[q1=q3 ,q2=q4 ,q7=q2] endmodule
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module process4 =process1[q1=q4 ,q2=q5 ,q7=q3] endmodule
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module process5 =process1[q1=q5 ,q2=q6 ,q7=q4] endmodule
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module process6 =process1[q1=q6 ,q2=q7 ,q7=q5] endmodule
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module process7 =process1[q1=q7 ,q2=q1 ,q7=q6] endmodule
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// cost - 1 in each state (expected steps)
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rewards
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true : 1;
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endrewards
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// initial states (at least one token)
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init
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q1+q2+q3+q4+q5+q6+q7>=1
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endinit
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