Parsed test spec with 2 sessions

starting permutation: s1r s2r1 s1c s2r2 s2c
step s1r: SELECT COUNT(*) FROM foo;
count
-----
  100
(1 row)

step s2r1: SELECT COUNT(*) FROM foo;
count
-----
  100
(1 row)

step s1c: COMMIT;
step s2r2: SELECT COUNT(*) FROM foo;
count
-----
  100
(1 row)

step s2c: COMMIT;