If A s< B holds, then A u< also holds, if A s>= 0. https://alive2.llvm.org/ce/z/J4JZuN
If A >s B then A >=u 0, if B >=s -1. https://alive2.llvm.org/ce/z/cncGKi
This patch adds a new transferToOtherSystem helper that tries to transfer information from signed predicates to the unsigned system and vice versa. The initial version adds A >=u B for A >=s B && B >=s 0 https://alive2.llvm.org/ce/z/8b6F9i
Florian Hahn