MAYBE UNSAT "/tmp/SMTS19696-5" (line 1, column 6): The smt problem could not be solved (was unsat). Parsed Typed Term Rewrite System: --------------------------------- (STRATEGY INNERMOST) (VAR "v8" "v12" "v40" "v14" "v56" "v6" "v3" "v2" "v1") (DATATYPES "list" = µX.< "Nil", "product_ms_ns_2"("__ANY_TYPE__"), "Cons"("__ANY_TYPE__", X), "product_ms_ns"(X) > "pair" = < "Pair"("__ANY_TYPE__", "__ANY_TYPE__") >) (SIGNATURES "foldr#3" :: ["list" x "list" x "list"] --> "list" "main" :: ["list" x "list"] --> "list") (RULES "foldr#3"("v8","v12","Nil"()) -> "v12" "foldr#3"("product_ms_ns_2"("v40"),"v14","Cons"("v56","v6")) -> "Cons"("Pair"("v40","v56"),"foldr#3"("product_ms_ns_2"("v40"),"v14","v6")) "foldr#3"("product_ms_ns"("v3"),"Nil"(),"Cons"("v2","v1")) -> "foldr#3"("product_ms_ns_2"("v2"),"foldr#3"("product_ms_ns"("v3"),"Nil"(),"v1"),"v3") "main"("v2","v1") -> "foldr#3"("product_ms_ns"("v1"),"Nil"(),"v2")) MAYBE