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45 lines
1.9 KiB
45 lines
1.9 KiB
// randomized dining philosophers [LR81]
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// dxp/gxn 12/12/99
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// atomic formulae
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// left fork free and right fork free resp.
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formula lfree = (p2>=0&p2<=4)|p2=6|p2=10;
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formula rfree = (p8>=0&p8<=3)|p8=5|p8=7|p8=11;
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module phil1
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p1: [0..11];
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[] p1=0 -> (p1'=0); // stay thinking
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[] p1=0 -> (p1'=1); // trying
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[] p1=1 -> 0.5 : (p1'=2) + 0.5 : (p1'=3); // draw randomly
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[] p1=2 & lfree -> (p1'=4); // pick up left
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[] p1=2 & !lfree -> (p1'=2); // left not free
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[] p1=3 & rfree -> (p1'=5); // pick up right
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[] p1=3 & !rfree -> (p1'=3); // right not free
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[] p1=4 & rfree -> (p1'=8); // pick up right (got left)
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[] p1=4 & !rfree -> (p1'=6); // right not free (got left)
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[] p1=5 & lfree -> (p1'=8); // pick up left (got right)
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[] p1=5 & !lfree -> (p1'=7); // left not free (got right)
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[] p1=6 -> (p1'=1); // put down left
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[] p1=7 -> (p1'=1); // put down right
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[] p1=8 -> (p1'=9); // move to eating (got forks)
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[] p1=9 -> (p1'=10); // finished eating and put down left
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[] p1=9 -> (p1'=11); // finished eating and put down right
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[] p1=10 -> (p1'=0); // put down right and return to think
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[] p1=11 -> (p1'=0); // put down left and return to think
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endmodule
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// construct further modules through renaming
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module phil2 = phil1 [ p1=p2, p2=p3, p8=p1 ] endmodule
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module phil3 = phil1 [ p1=p3, p2=p4, p8=p2 ] endmodule
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module phil4 = phil1 [ p1=p4, p2=p5, p8=p3 ] endmodule
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module phil5 = phil1 [ p1=p5, p2=p6, p8=p4 ] endmodule
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module phil6 = phil1 [ p1=p6, p2=p7, p8=p5 ] endmodule
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module phil7 = phil1 [ p1=p7, p2=p8, p8=p6 ] endmodule
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module phil8 = phil1 [ p1=p8, p2=p1, p8=p7 ] endmodule
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// labels
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label "hungry" = ((p1>0)&(p1<8))|((p2>0)&(p2<8))|((p3>0)&(p3<8))|((p4>0)&(p4<8))|((p5>0)&(p5<8))|((p6>0)&(p6<8))|((p7>0)&(p7<8))|((p8>0)&(p8<8));
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label "eat" = ((p1>=8)&(p1<=9))|((p2>=8)&(p2<=9))|((p3>=8)&(p3<=9))|((p4>=8)&(p4<=9))|((p5>=8)&(p5<=9))|((p6>=8)&(p6<=9))|((p7>=8)&(p7<=9))|((p8>=8)&(p8<=9));
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