Parsed test spec with 2 sessions

starting permutation: donothing1 donothing2 c1 select2 c2
step donothing1: INSERT INTO ints(key, val) VALUES(1, 'donothing1') ON CONFLICT DO NOTHING;
step donothing2: INSERT INTO ints(key, val) VALUES(1, 'donothing2') ON CONFLICT DO NOTHING; <waiting ...>
step c1: COMMIT;
step donothing2: <... completed>
step select2: SELECT * FROM ints;
key|val       
---+----------
  1|donothing1
(1 row)

step c2: COMMIT;

starting permutation: donothing1 donothing2 a1 select2 c2
step donothing1: INSERT INTO ints(key, val) VALUES(1, 'donothing1') ON CONFLICT DO NOTHING;
step donothing2: INSERT INTO ints(key, val) VALUES(1, 'donothing2') ON CONFLICT DO NOTHING; <waiting ...>
step a1: ABORT;
step donothing2: <... completed>
step select2: SELECT * FROM ints;
key|val       
---+----------
  1|donothing2
(1 row)

step c2: COMMIT;