You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.7 KiB
43 lines
1.7 KiB
// randomized dining philosophers [LR81]
|
|
// dxp/gxn 12/12/99
|
|
// atomic formulae
|
|
// left fork free and right fork free resp.
|
|
formula lfree = p2>=0&p2<=4|p2=6|p2=10;
|
|
formula rfree = p3>=0&p3<=3|p3=5|p3=7|p3=11;
|
|
|
|
module phil1
|
|
|
|
p1: [0..11];
|
|
|
|
[] p1=0 -> (p1'=0); // stay thinking
|
|
[] p1=0 -> (p1'=1); // trying
|
|
[] p1=1 -> 0.5 : (p1'=2) + 0.5 : (p1'=3); // draw randomly
|
|
[] p1=2 & lfree -> (p1'=4); // pick up left
|
|
[] p1=2 & !lfree -> (p1'=2); // left not free
|
|
[] p1=3 & rfree -> (p1'=5); // pick up right
|
|
[] p1=3 & !rfree -> (p1'=3); // right not free
|
|
[] p1=4 & rfree -> (p1'=8); // pick up right (got left)
|
|
[] p1=4 & !rfree -> (p1'=6); // right not free (got left)
|
|
[] p1=5 & lfree -> (p1'=8); // pick up left (got right)
|
|
[] p1=5 & !lfree -> (p1'=7); // left not free (got right)
|
|
[] p1=6 -> (p1'=1); // put down left
|
|
[] p1=7 -> (p1'=1); // put down right
|
|
[] p1=8 -> (p1'=9); // move to eating (got forks)
|
|
[] p1=9 -> (p1'=10); // finished eating and put down left
|
|
[] p1=9 -> (p1'=11); // finished eating and put down right
|
|
[] p1=10 -> (p1'=0); // put down right and return to think
|
|
[] p1=11 -> (p1'=0); // put down left and return to think
|
|
|
|
endmodule
|
|
|
|
// construct further modules through renaming
|
|
module phil2 = phil1 [ p1=p2, p2=p3, p3=p1 ] endmodule
|
|
module phil3 = phil1 [ p1=p3, p2=p4, p3=p2 ] endmodule
|
|
module phil4 = phil1 [ p1=p4, p2=p5, p3=p3 ] endmodule
|
|
module phil5 = phil1 [ p1=p5, p2=p6, p3=p4 ] endmodule
|
|
module phil6 = phil1 [ p1=p6, p2=p1, p3=p5 ] endmodule
|
|
|
|
// labels
|
|
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));
|
|
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));
|
|
|