MAYBE UNSAT "/tmp/SMTS4493-9" (line 1, column 6): The smt problem could not be solved (was unsat). Parsed Typed Term Rewrite System: --------------------------------- (STRATEGY INNERMOST) (VAR "v2" "v1" "v6" "v4" "v0") (DATATYPES "list" = µX.< "Nil", "Cons"("__ANY_TYPE__", X) >) (SIGNATURES "rev#1" :: ["list"] --> "list" "append#2" :: ["list" x "list"] --> "list" "main" :: ["list"] --> "list") (RULES "rev#1"("Nil"()) -> "Nil"() "rev#1"("Cons"("v2","v1")) -> "append#2"("rev#1"("v1"),"Cons"("v2","Nil"())) "append#2"("Nil"(),"Cons"("v2","Nil"())) -> "Cons"("v2","Nil"()) "append#2"("Cons"("v6","v4"),"Cons"("v2","Nil"())) -> "Cons"("v6","append#2"("v4","Cons"("v2","Nil"()))) "main"("v0") -> "rev#1"("v0")) MAYBE