fix #6477

Z3Prover · Dec 4, 2022 · 8709595 · 8709595
1 parent ead2a46
commit 8709595
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/ast/rewriter/bv_rewriter.cpp b/src/ast/rewriter/bv_rewriter.cpp
@@ -1988,6 +1988,10 @@ bool bv_rewriter::distribute_concat(decl_kind k, unsigned n, expr* const* args,
             expr* e = to_app(arg)->get_arg(0);
             unsigned sz1 = get_bv_size(e);
             unsigned sz2 = get_bv_size(arg);
+            if (sz1 == sz2) {
+                result = m.mk_app(get_fid(), k, n, args);
+                return true;
+            }
             expr_ref_vector args1(m), args2(m);
             for (unsigned j = 0; j < n; ++j) {
                 args1.push_back(m_mk_extract(sz2 - 1, sz2 - sz1, args[j]));