Overflow checking #3027

Tests

• ❌ key.core.testgen:test [no report files] (11 succeeded, 2 failed)
• ❌ key.core:test [no report files] (796 succeeded, 84 failed, 80 skipped)
• ❌ key.core:testProveRules [no report files] (0 succeeded, 1 failed)
• ❌ key.core:testRunAllFunProofs [no report files] (0 succeeded, 47 failed)
• ❌ key.core:testRunAllInfProofs [no report files] (1 succeeded, 29 failed)
• ✅ key.removegenerics:test [no report files] (45 succeeded)
• ✅ key.ui:test [no report files] (5 succeeded)
• ✅ key.util:test [no report files] (153 succeeded)
• ❌ keyext.exploration:test [no report files] (0 succeeded, 3 failed)
• ✅ recoder:test [no report files] (14 succeeded, 15 skipped)