Parsed test spec with 2 sessions

starting permutation: s1a s1b s1c s1d s2a s2b s2c s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s1c s2a s1d s2b s2c s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2a: BEGIN;
step s1d: COMMIT;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s1c s2a s2b s1d s2c s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s1c s2a s2b s2c s1d s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s2a s1c s1d s2b s2c s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2a: BEGIN;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s2a s1c s2b s1d s2c s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2a: BEGIN;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s2a s1c s2b s2c s1d s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2a: BEGIN;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s2a s2b s1c s1d s2c s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s2a s2b s1c s2c s1d s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s1b s2a s2b s2c s1c s1d s2d
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s1b s1c s1d s2b s2c s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s1b s1c s2b s1d s2c s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s1b s1c s2b s2c s1d s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s1b s2b s1c s1d s2c s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s1b s2b s1c s2c s1d s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s1b s2b s2c s1c s1d s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s2b s1b s1c s1d s2c s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s2b s1b s1c s2c s1d s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s2b s1b s2c s1c s1d s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s1a s2a s2b s2c s1b s1c s1d s2d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2d: COMMIT;

starting permutation: s1a s2a s2b s2c s1b s1c s2d s1d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2d: COMMIT;
step s1d: COMMIT;

starting permutation: s1a s2a s2b s2c s1b s2d s1c s1d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2d: COMMIT;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s1a s2a s2b s2c s2d s1b s1c s1d
step s1a: BEGIN;
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s1a s1b s1c s1d s2b s2c s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s1b s1c s2b s1d s2c s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s1b s1c s2b s2c s1d s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s1b s2b s1c s1d s2c s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s1b s2b s1c s2c s1d s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s1b s2b s2c s1c s1d s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s2b s1b s1c s1d s2c s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s2b s1b s1c s2c s1d s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s2b s1b s2c s1c s1d s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s1a s2b s2c s1b s1c s1d s2d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2d: COMMIT;

starting permutation: s2a s1a s2b s2c s1b s1c s2d s1d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2d: COMMIT;
step s1d: COMMIT;

starting permutation: s2a s1a s2b s2c s1b s2d s1c s1d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2d: COMMIT;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s1a s2b s2c s2d s1b s1c s1d
step s2a: BEGIN;
step s1a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s2b s1a s1b s1c s1d s2c s2d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s2b s1a s1b s1c s2c s1d s2d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s2b s1a s1b s2c s1c s1d s2d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2c: INSERT INTO a VALUES (0); <waiting ...>
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2c: <... completed>
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;

starting permutation: s2a s2b s1a s2c s1b s1c s1d s2d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2d: COMMIT;

starting permutation: s2a s2b s1a s2c s1b s1c s2d s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2d: COMMIT;
step s1d: COMMIT;

starting permutation: s2a s2b s1a s2c s1b s2d s1c s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2d: COMMIT;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s2b s1a s2c s2d s1b s1c s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s1a: BEGIN;
step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s2b s2c s1a s1b s1c s1d s2d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;
step s2d: COMMIT;

starting permutation: s2a s2b s2c s1a s1b s1c s2d s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s2d: COMMIT;
step s1d: COMMIT;

starting permutation: s2a s2b s2c s1a s1b s2d s1c s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s2d: COMMIT;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s2b s2c s1a s2d s1b s1c s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s1a: BEGIN;
step s2d: COMMIT;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;

starting permutation: s2a s2b s2c s2d s1a s1b s1c s1d
step s2a: BEGIN;
step s2b: SELECT * FROM a WHERE i = 1 LIMIT 1 FOR UPDATE;
i
-
1
(1 row)

step s2c: INSERT INTO a VALUES (0);
ERROR:  duplicate key value violates unique constraint "a_pkey"
step s2d: COMMIT;
step s1a: BEGIN;
step s1b: ALTER TABLE a DISABLE TRIGGER t;
step s1c: ALTER TABLE a ENABLE TRIGGER t;
step s1d: COMMIT;