never {
s1_init:
    if
    :: (p) -> goto s0
    :: !(p) -> goto s0
    fi;
s0:
    if
    :: !(p) -> goto s0
    :: (p) -> goto accept_s2
    fi;
accept_s2:
    if
    :: (p) -> goto accept_s2
    :: !(p) -> goto accept_s2
    fi;
}