never {
s0_init:
    if
    :: (s) && !(t) -> goto s2
    :: (q) && !(r) && (s) && !(t) -> goto s3
    :: (1) -> goto s0_init
    :: (q) && (r) && (s) && !(t) -> goto accept_s1
    fi;
s2:
    if
    :: !(s) && !(t) -> goto s2
    :: (q) && (r) && !(s) && !(t) -> goto accept_s1
    :: (q) && !(r) && !(t) -> goto accept_s1
    fi;
s3:
    if
    :: !(p) && (r) -> goto accept_s4
    :: !(r) && !(t) -> goto s3
    fi;
accept_s1:
    if
    :: !(r) && !(t) -> goto s3
    :: !(p) && (r) -> goto accept_s4
    fi;
accept_s4:
    if
    :: !(p) -> goto accept_s4
    fi;
}