never {
accept_init:
s0_init:
    if
    :: (p) && !(r) && !(s) -> goto s0_init
    :: (s) -> goto s1
    :: (r) && !(s) -> goto accept_s2
    :: !(p) && !(r) && !(s) -> goto accept_s3
    fi;
s1:
    if
    :: (1) -> goto s1
    fi;
accept_s2:
    if
    :: (s) -> goto s1
    :: (q) && !(s) -> goto accept_s2
    :: !(q) && (r) && !(s) -> goto accept_s2
    :: (p) && !(q) && !(r) && !(s) -> goto s0_init
    :: !(p) && !(q) && !(r) && !(s) -> goto accept_s3
    fi;
accept_s3:
    if
    :: (1) -> goto accept_s3
    fi;
}