Parsed test spec with 2 sessions

starting permutation: rx1 wy1 c1 rx2 ry2 wx2 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
   1
(1 row)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;

starting permutation: rx1 wy1 rx2 c1 ry2 wx2 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step c1: COMMIT;
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx1 wy1 rx2 ry2 c1 wx2 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step c1: COMMIT;
step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx1 wy1 rx2 ry2 wx2 c1 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 wy1 rx2 ry2 wx2 c2 c1
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 wy1 c1 ry2 wx2 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx1 rx2 wy1 ry2 c1 wx2 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step c1: COMMIT;
step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx1 rx2 wy1 ry2 wx2 c1 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 wy1 ry2 wx2 c2 c1
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 ry2 wy1 c1 wx2 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx1 rx2 ry2 wy1 wx2 c1 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step wx2: DELETE FROM a WHERE i = 1;
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 ry2 wy1 wx2 c2 c1
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 ry2 wx2 wy1 c1 c2
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 ry2 wx2 wy1 c2 c1
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step wy1: INSERT INTO b VALUES (1);
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx1 rx2 ry2 wx2 c2 wy1 c1
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step wy1: INSERT INTO b VALUES (1);
ERROR:  could not serialize access due to read/write dependencies among transactions
step c1: COMMIT;

starting permutation: rx2 rx1 wy1 c1 ry2 wx2 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx2 rx1 wy1 ry2 c1 wx2 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step c1: COMMIT;
step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx2 rx1 wy1 ry2 wx2 c1 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 rx1 wy1 ry2 wx2 c2 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 rx1 ry2 wy1 c1 wx2 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx2 rx1 ry2 wy1 wx2 c1 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step wx2: DELETE FROM a WHERE i = 1;
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 rx1 ry2 wy1 wx2 c2 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 rx1 ry2 wx2 wy1 c1 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 rx1 ry2 wx2 wy1 c2 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step wy1: INSERT INTO b VALUES (1);
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 rx1 ry2 wx2 c2 wy1 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step wy1: INSERT INTO b VALUES (1);
ERROR:  could not serialize access due to read/write dependencies among transactions
step c1: COMMIT;

starting permutation: rx2 ry2 rx1 wy1 c1 wx2 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step wx2: DELETE FROM a WHERE i = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step c2: COMMIT;

starting permutation: rx2 ry2 rx1 wy1 wx2 c1 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step wx2: DELETE FROM a WHERE i = 1;
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 ry2 rx1 wy1 wx2 c2 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 ry2 rx1 wx2 wy1 c1 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wx2: DELETE FROM a WHERE i = 1;
step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 ry2 rx1 wx2 wy1 c2 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wx2: DELETE FROM a WHERE i = 1;
step wy1: INSERT INTO b VALUES (1);
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 ry2 rx1 wx2 c2 wy1 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step wy1: INSERT INTO b VALUES (1);
ERROR:  could not serialize access due to read/write dependencies among transactions
step c1: COMMIT;

starting permutation: rx2 ry2 wx2 rx1 wy1 c1 c2
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 ry2 wx2 rx1 wy1 c2 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step wy1: INSERT INTO b VALUES (1);
step c2: COMMIT;
step c1: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: rx2 ry2 wx2 rx1 c2 wy1 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step rx1: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step c2: COMMIT;
step wy1: INSERT INTO b VALUES (1);
ERROR:  could not serialize access due to read/write dependencies among transactions
step c1: COMMIT;

starting permutation: rx2 ry2 wx2 c2 rx1 wy1 c1
step rx2: SELECT i FROM a WHERE i = 1;
i
-
1
(1 row)

step ry2: SELECT a_id FROM b WHERE a_id = 1;
a_id
----
(0 rows)

step wx2: DELETE FROM a WHERE i = 1;
step c2: COMMIT;
step rx1: SELECT i FROM a WHERE i = 1;
i
-
(0 rows)

step wy1: INSERT INTO b VALUES (1);
step c1: COMMIT;