When combining at least 3 "not equal" constraints in a conjunction of disjunction,
the pattern will not match as expected when compiled with executable model.

For example the following rule:

    rule "test with three attributes"
    when Pojo(x != 0 && (y != 11 || z != 12))
    then
    end

if compiled with executable model, will match against the following fact:

    Pojo{x=0, y=1, z=2}

whereas it does not when compiled in DRL mode.