Where does the Bible say that the satan is guilty of the unforgivable sin?
Neither of the verses you presented say even mention the satan
True, neither Satan nor Adam are mentioned yet both have no future life.
Satan will be destroyed according to Hebrews 2:14 B. Jesus is the one that is the 'seed' of Genesis 3:15 that will deal Satan that fatal death bruise to his head.
Adam was told he was from dust and upon disobedience return to where he started or originated which was dust. Dust to dust.
Angels were created with heavenly perfection.
Adam was created with earthly or human perfection.
Perfect creation does not sin by mistake. Perfect creation can only sin on purpose, deliberate, intentional, willful. There is no record that either Satan nor Adam expressed any remorse or sorrow as we, being imperfect, might. Jesus ransom sacrifice does not cover the fallen angels nor Adam and Eve, but we through no fault of our own, are imperfect so Jesus ransom can cover for us. Hebrews 10:26; Matthew 20:28.