(Isaiah 41) Open theism

Tell us, you idols, what is going to happen. Tell us what the former things were, so that we may consider them and know their final outcome. Or declare to us the things to come, tell us what the future holds,  so we may know that you are gods. Do something, whether good or bad,  so that we will be dismayed and filled with fear. But you are less than nothing and your works are utterly worthless; whoever chooses you is detestable. 

The idols were challenged to foretell the future, as a test of their “God-ness”.  The strong implication here is that no one can foretell the future, except God alone.  These verses do not square with the notion of open theism.