pomdp

observable "end" = s=5;
observable "trap" = s=4;

module main
    s : [0..5] init 0;
    [a] s = 0 -> 0.25: (s'=1) + 0.25: (s'=2) + 0.5:(s'=3);
    [b] s=0 -> 0.5: (s'=1) + 0.5: (s'=2);
    [a] s=1 -> (s'=2);
    [a] s=2 -> (s'=1);
    [b] s=1 -> (s'=4);
    [b] s=2 -> (s'=5);
    [a] s=3 -> (s'=5);
    [b] s=3 -> (s'=5);
endmodule

label "goal" = s=5;