Fix: algorithm change input adj_matrices

Author: homka122

experimental/algorithm/LAGraph_CFL_reachability_advanced.c

@@ -252,7 +252,9 @@ GrB_Info LAGraph_CFL_reachability_adv(
         GrB_Index ncols;
         GrB_Matrix_ncols(&ncols, adj_matrices[i]);
 
-        delta_matrices[i] = CFL_matrix_from_base(adj_matrices[i]);
+        GrB_Matrix new_adj_matrix;
+        GrB_Matrix_dup(&new_adj_matrix, adj_matrices[i]);
+        delta_matrices[i] = CFL_matrix_from_base(new_adj_matrix);
 
         GRB_TRY(GrB_Matrix_new(&matrix, GrB_BOOL, nrows, ncols));
         matrices[i] = ((optimizations & OPT_LAZY) || (optimizations & OPT_BLOCK))