never {
s0_init:
    if
    :: !(p) && (s) -> goto accept_s3
    :: !(p) && (q) && (s) -> goto s2
    :: !(p) && !(q) && (s) -> goto s4
    :: !(s) -> goto accept_s1
    fi;
s2:
    if
    :: !(p) && !(r) -> goto s2
    :: (r) -> goto accept_s1
    fi;
s4:
    if
    :: !(p) && !(q) -> goto s4
    :: !(p) && (q) -> goto s2
    fi;
accept_s1:
    if
    :: (1) -> goto accept_s1
    fi;
accept_s3:
    if
    :: !(p) -> goto accept_s3
    fi;
}