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54 lines
1.5 KiB
54 lines
1.5 KiB
// mutual exclusion [PZ82]
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// dxp/gxn 19/12/99
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nondeterministic
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// atomic formula
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// none in low, high, tie
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formula none_lht = p2!=4..13 & p3!=4..13 & p4!=4..13;
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// some in admit
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formula some_a = p2=14..15 | p3=14..15 | p4=14..15;
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// some in high, admit
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formula some_ha = p2=4..5,10..15 | p3=4..5,10..15 | p4=4..5,10..15;
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// none in high, tie, admit
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formula none_hta = p2=0..3,7..8 & p3=0..3,7..8 & p4=0..3,7..8;
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// none in enter
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formula none_e = p2!=2..3 & p3!=2..3 & p4!=2..3;
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module process1
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p1: [0..15];
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[] p1=0 -> (p1'=0);
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[] p1=0 -> (p1'=1);
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[] p1=1 -> (p1'=2);
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[] p1=2 & (none_lht | some_a) -> (p1'=3);
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[] p1=2 & !(none_lht | some_a) -> (p1'=2);
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[] p1=3 -> (p1'=4);
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[] p1=3 -> (p1'=7);
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[] p1=4 & some_ha -> (p1'=5);
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[] p1=4 & !some_ha -> (p1'=10);
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[] p1=5 -> (p1'=6);
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[] p1=6 & some_ha -> (p1'=6);
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[] p1=6 & !some_ha -> (p1'=9);
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[] p1=7 & none_hta -> (p1'=8);
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[] p1=7 & !none_hta -> (p1'=7);
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[] p1=8 -> (p1'=9);
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[] p1=9 -> 0.5 : (p1'=4) + 0.5 : (p1'=7);
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[] p1=10 -> (p1'=11);
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[] p1=11 & none_lht -> (p1'=13);
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[] p1=11 & !none_lht -> (p1'=12);
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[] p1=12 -> (p1'=0);
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[] p1=13 -> (p1'=14);
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[] p1=14 & none_e -> (p1'=15);
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[] p1=14 & !none_e -> (p1'=14);
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[] p1=15 -> (p1'=0);
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endmodule
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// construct further modules through renaming
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module process2 = process1 [p1=p2, p2=p1] endmodule
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module process3 = process1 [p1=p3, p3=p1] endmodule
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module process4 = process1 [p1=p4, p4=p1] endmodule
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