Parsed test spec with 2 sessions

starting permutation: s1a s1b s1c s2a s2b s2c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;

starting permutation: s1a s1b s2a s1c s2b s2c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1c: COMMIT;
step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;

starting permutation: s1a s1b s2a s2b s1c s2c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1c: COMMIT;
step s2c: COMMIT;

starting permutation: s1a s1b s2a s2b s2c s1c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2c: COMMIT;
step s1c: COMMIT;

starting permutation: s1a s2a s1b s1c s2b s2c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;
step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;

starting permutation: s1a s2a s1b s2b s1c s2c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1c: COMMIT;
step s2c: COMMIT;

starting permutation: s1a s2a s1b s2b s2c s1c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2c: COMMIT;
step s1c: COMMIT;

starting permutation: s1a s2a s2b s1b s1c s2c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;
step s2c: COMMIT;

starting permutation: s1a s2a s2b s1b s2c s1c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;
step s1c: COMMIT;

starting permutation: s1a s2a s2b s2c s1b s1c
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2c: COMMIT;
step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;

starting permutation: s2a s1a s1b s1c s2b s2c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1c: COMMIT;
step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;

starting permutation: s2a s1a s1b s2b s1c s2c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;
step s2c: COMMIT;

starting permutation: s2a s1a s1b s2b s2c s1c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;
step s1c: COMMIT;

starting permutation: s2a s1a s2b s1b s1c s2c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1c: COMMIT;
step s2c: COMMIT;

starting permutation: s2a s1a s2b s1b s2c s1c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2c: COMMIT;
step s1c: COMMIT;

starting permutation: s2a s1a s2b s2c s1b s1c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;
step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;

starting permutation: s2a s2b s1a s1b s1c s2c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1c: COMMIT;
step s2c: COMMIT;

starting permutation: s2a s2b s1a s1b s2c s1c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2c: COMMIT;
step s1c: COMMIT;

starting permutation: s2a s2b s1a s2c s1b s1c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 2|bar |NEW   
(1 row)

step s2c: COMMIT;
step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;

starting permutation: s2a s2b s2c s1a s1b s1c
step s2a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s2c: COMMIT;
step s1a: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id|data|status
--+----+------
 1|foo |NEW   
(1 row)

step s1c: COMMIT;