Parsed test spec with 3 sessions

starting permutation: s0_vacuum s1_plan s1_fetches s1_begin s2_begin s1_read s2_read s1_update s2_update s1_commit s2_commit
step s0_vacuum: VACUUM bps_d;
step s1_plan: EXPLAIN (COSTS OFF) SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 1;
QUERY PLAN                                  
--------------------------------------------
Nested Loop                                 
  ->  Seq Scan on bps_o o                   
  ->  Custom Scan (LionBtreeScan) on bps_d d
        Index: bps_d_pkey (index only)      
        Index Cond: (d.id = o.k)            
        Lion Cond: (d.c = 1)                
        Lion Indexes: bps_d_c               
(7 rows)

step s1_fetches: SELECT bps_fetches('SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 1');
bps_fetches                                    
-----------------------------------------------
Index: bps_d_pkey (index only); Heap Fetches: 0
(1 row)

step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1_read: SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 1 ORDER BY d.id;
id
--
 1
11
(2 rows)

step s2_read: SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 2 ORDER BY d.id;
id
--
 2
12
(2 rows)

step s1_update: UPDATE bps_d SET note = 's1' WHERE id = 2;
step s2_update: UPDATE bps_d SET note = 's2' WHERE id = 1;
step s1_commit: COMMIT;
step s2_commit: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions

starting permutation: s0_vacuum s1_fetches s1_begin s2_begin s1_read s2_read s1_update s1_commit s2_update s2_commit
step s0_vacuum: VACUUM bps_d;
step s1_fetches: SELECT bps_fetches('SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 1');
bps_fetches                                    
-----------------------------------------------
Index: bps_d_pkey (index only); Heap Fetches: 0
(1 row)

step s1_begin: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s2_begin: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1_read: SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 1 ORDER BY d.id;
id
--
 1
11
(2 rows)

step s2_read: SELECT d.id FROM bps_o o JOIN bps_d d ON d.id = o.k WHERE d.c = 2 ORDER BY d.id;
id
--
 2
12
(2 rows)

step s1_update: UPDATE bps_d SET note = 's1' WHERE id = 2;
step s1_commit: COMMIT;
step s2_update: UPDATE bps_d SET note = 's2' WHERE id = 1;
ERROR:  could not serialize access due to read/write dependencies among transactions
step s2_commit: COMMIT;