Parsed test spec with 2 sessions

starting permutation: b1 b2 r1 r2 w1 w2 c1 c2
step b1: BEGIN ISOLATION LEVEL SERIALIZABLE;
step b2: BEGIN ISOLATION LEVEL SERIALIZABLE;
step r1: SELECT * FROM test WHERE i IN (5, 7)
i              t              

5              apple          
7              pear_hot_updated
step r2: SELECT * FROM test WHERE i IN (5, 7)
i              t              

5              apple          
7              pear_hot_updated
step w1: UPDATE test SET t = 'pear_xact1' WHERE i = 7
step w2: UPDATE test SET t = 'apple_xact2' WHERE i = 5
step c1: COMMIT;
step c2: COMMIT;
ERROR:  could not serialize access due to read/write dependencies among transactions