Parsed test spec with 2 sessions starting permutation: s1_begin s2_begin s1_refresh s2_read s2_insert s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s2_insert: INSERT INTO orders VALUES ('2022-04-02', 'orange', 15); step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s1_refresh s2_read s2_update s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s2_update: UPDATE orders SET num = num + 1; step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s2_read s1_refresh s2_insert s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s2_insert: INSERT INTO orders VALUES ('2022-04-02', 'orange', 15); step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s2_read s1_refresh s2_update s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s2_update: UPDATE orders SET num = num + 1; step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s2_read s2_insert s1_refresh s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s2_insert: INSERT INTO orders VALUES ('2022-04-02', 'orange', 15); step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s2_read s2_update s1_refresh s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s2_update: UPDATE orders SET num = num + 1; step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s1_refresh s2_insert s2_read s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s2_insert: INSERT INTO orders VALUES ('2022-04-02', 'orange', 15); step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions starting permutation: s1_begin s2_begin s1_refresh s2_update s2_read s1_commit s2_commit step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE; step s1_refresh: REFRESH MATERIALIZED VIEW CONCURRENTLY order_summary; step s2_update: UPDATE orders SET num = num + 1; step s2_read: SELECT max(date) FROM order_summary; max ---------- 04-01-2022 (1 row) step s1_commit: COMMIT; step s2_commit: COMMIT; ERROR: could not serialize access due to read/write dependencies among transactions