Parsed test spec with 2 sessions

starting permutation: s1l s1svp s1d s1r s1c s2l s2c
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s1svp: SAVEPOINT f;
step s1d: DELETE FROM foo;
step s1r: ROLLBACK TO f;
step s1c: COMMIT;
step s2l: SELECT * FROM foo FOR UPDATE;
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;

starting permutation: s1l s1svp s1d s1r s2l s1c s2c
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s1svp: SAVEPOINT f;
step s1d: DELETE FROM foo;
step s1r: ROLLBACK TO f;
step s2l: SELECT * FROM foo FOR UPDATE; <waiting ...>
step s1c: COMMIT;
step s2l: <... completed>
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;

starting permutation: s1l s1svp s1d s2l s1r s1c s2c
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s1svp: SAVEPOINT f;
step s1d: DELETE FROM foo;
step s2l: SELECT * FROM foo FOR UPDATE; <waiting ...>
step s1r: ROLLBACK TO f;
step s1c: COMMIT;
step s2l: <... completed>
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;

starting permutation: s1l s1svp s2l s1d s1r s1c s2c
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s1svp: SAVEPOINT f;
step s2l: SELECT * FROM foo FOR UPDATE; <waiting ...>
step s1d: DELETE FROM foo;
step s1r: ROLLBACK TO f;
step s1c: COMMIT;
step s2l: <... completed>
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;

starting permutation: s1l s2l s1svp s1d s1r s1c s2c
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s2l: SELECT * FROM foo FOR UPDATE; <waiting ...>
step s1svp: SAVEPOINT f;
step s1d: DELETE FROM foo;
step s1r: ROLLBACK TO f;
step s1c: COMMIT;
step s2l: <... completed>
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;

starting permutation: s2l s1l s2c s1svp s1d s1r s1c
step s2l: SELECT * FROM foo FOR UPDATE;
key|value
---+-----
  1|    1
(1 row)

step s1l: SELECT * FROM foo FOR KEY SHARE; <waiting ...>
step s2c: COMMIT;
step s1l: <... completed>
key|value
---+-----
  1|    1
(1 row)

step s1svp: SAVEPOINT f;
step s1d: DELETE FROM foo;
step s1r: ROLLBACK TO f;
step s1c: COMMIT;

starting permutation: s2l s2c s1l s1svp s1d s1r s1c
step s2l: SELECT * FROM foo FOR UPDATE;
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s1svp: SAVEPOINT f;
step s1d: DELETE FROM foo;
step s1r: ROLLBACK TO f;
step s1c: COMMIT;