refine rewriting depth for lt constraints

NikolajBjorner · NikolajBjorner · commit 62db7642ec90 · 2024-11-14T21:43:40.000-08:00
diff --git a/src/ast/rewriter/seq_rewriter.cpp b/src/ast/rewriter/seq_rewriter.cpp
@@ -2473,7 +2473,7 @@ br_status seq_rewriter::mk_str_lt(expr* a, expr* b, expr_ref& result) {
     }
     if (str().is_empty(a)) {
         result = m().mk_not(m().mk_eq(a, b));
-        return BR_DONE;
+        return BR_REWRITE1;
     }
     if (str().is_string(a, as) && str().is_string(b, bs)) {
         unsigned sz = std::min(as.length(), bs.length());

Original file line number	Diff line number	Diff line change
`@@ -2473,7 +2473,7 @@ br_status seq_rewriter::mk_str_lt(expr* a, expr* b, expr_ref& result) {`
`2473`	`2473`	`}`
`2474`	`2474`	`if (str().is_empty(a)) {`
`2475`	`2475`	`result = m().mk_not(m().mk_eq(a, b));`
`2476`		`- return BR_DONE;`
	`2476`	`+ return BR_REWRITE1;`
`2477`	`2477`	`}`
`2478`	`2478`	`if (str().is_string(a, as) && str().is_string(b, bs)) {`
`2479`	`2479`	`unsigned sz = std::min(as.length(), bs.length());`