Does the Bible Contradict Itself?

[Taqiyya Mockingbird]

Heres two propositions throughout the Bible in numerous passages that contradict:
1. God is omnipotent, all-powerful and all knowing.
2. We have freewill.

If God has knowledge of events past, future and present then that means there is a single, unchanging path we all travel. Every choice we make is preordained to occur as is the outcome which means it isn't really a choice. We're just following the script of a massive machination.
Ergo, either God is not omnipotent or there is no free-will.
If free-will is implemented then that makes our future unwritten and therefore unpredictable to God, rendering omnipotence meaningless.
If God is omnipotent then that negates freewill, rendering freewill meaningless.
Explain.

Examples:
"And if it is disagreeable in your sight to serve the LORD, choose for yourselves today whom you will serve: whether the gods which your fathers served which were beyond the River, or the gods of the Amorites in whose land you are living; but as for me and my house, we will serve the LORD." (Joshua 24:15)

"For I am God, and there is no other;
I am God, and there is none like me,
declaring the end from the beginning
and from ancient times things not yet done,
saying, "My counsel shall stand,
and I will accomplish all my purpose,"
calling a bird of prey from the east,
the man of my counsel from a far country.
I have spoken, and I will bring it to pass;
I have purposed, and I will do it."
(Isaiah 46.9-11)

Calvinists and other proponents of Reformed Theology address the apparent contradiction by saying our choices (both for good, or evil) are chosen by God. No free will, no seeming contradictions.

How would you respond to their answer?

Does all of xtardity agree with these calvinists? Do calvinists speak for all xtards? Last time I checked, they were one of the more batshit-crazy sects, including such shining examples as Fred and Shirley Phelps.