Parsed test spec with 2 sessions

starting permutation: s1-begin s2-begin s1-insert s2-insert s1-select s2-select s1-commit s2-commit s1-select
step s1-begin:
    BEGIN;

step s2-begin:
    BEGIN;

step s1-insert:
    INSERT INTO test_insert_concurrency SELECT i, 2 * i FROM generate_series(1, 3) i;

step s2-insert:
    INSERT INTO test_insert_concurrency SELECT i, 2 * i FROM generate_series(4, 6) i;

step s1-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

1              2
2              4
3              6
step s2-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

4              8
5              10
6              12
step s1-commit:
    COMMIT;

step s2-commit:
    COMMIT;

step s1-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

1              2
2              4
3              6
4              8
5              10
6              12

starting permutation: s1-begin s2-begin s1-copy s2-insert s1-select s2-select s1-commit s2-commit s1-select
step s1-begin:
    BEGIN;

step s2-begin:
    BEGIN;

step s1-copy:
    COPY test_insert_concurrency(a) FROM PROGRAM 'seq 11 13';

step s2-insert:
    INSERT INTO test_insert_concurrency SELECT i, 2 * i FROM generate_series(4, 6) i;

step s1-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

11
12
13
step s2-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

4              8
5              10
6              12
step s1-commit:
    COMMIT;

step s2-commit:
    COMMIT;

step s1-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

4              8
5              10
6              12
11
12
13

starting permutation: s1-begin s2-begin s2-insert s1-copy s1-select s2-select s1-commit s2-commit s1-select
step s1-begin:
    BEGIN;

step s2-begin:
    BEGIN;

step s2-insert:
    INSERT INTO test_insert_concurrency SELECT i, 2 * i FROM generate_series(4, 6) i;

step s1-copy:
    COPY test_insert_concurrency(a) FROM PROGRAM 'seq 11 13';

step s1-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

11
12
13
step s2-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

4              8
5              10
6              12
step s1-commit:
    COMMIT;

step s2-commit:
    COMMIT;

step s1-select:
    SELECT * FROM test_insert_concurrency ORDER BY a;

a              b

4              8
5              10
6              12
11
12
13