Parsed test spec with 2 sessions

starting permutation: s1a s2a s2b s1b s2c
step s1a: SELECT * FROM queue ORDER BY id FOR SHARE SKIP LOCKED LIMIT 1;
id             data           status         

1              foo            NEW            
step s2a: SELECT * FROM queue ORDER BY id FOR SHARE SKIP LOCKED LIMIT 1;
id             data           status         

1              foo            NEW            
step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id             data           status         

2              bar            NEW            
step s1b: COMMIT;
step s2c: COMMIT;

starting permutation: s2a s1a s2b s1b s2c
step s2a: SELECT * FROM queue ORDER BY id FOR SHARE SKIP LOCKED LIMIT 1;
id             data           status         

1              foo            NEW            
step s1a: SELECT * FROM queue ORDER BY id FOR SHARE SKIP LOCKED LIMIT 1;
id             data           status         

1              foo            NEW            
step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id             data           status         

2              bar            NEW            
step s1b: COMMIT;
step s2c: COMMIT;

starting permutation: s2a s2b s1a s1b s2c
step s2a: SELECT * FROM queue ORDER BY id FOR SHARE SKIP LOCKED LIMIT 1;
id             data           status         

1              foo            NEW            
step s2b: SELECT * FROM queue ORDER BY id FOR UPDATE SKIP LOCKED LIMIT 1;
id             data           status         

1              foo            NEW            
step s1a: SELECT * FROM queue ORDER BY id FOR SHARE SKIP LOCKED LIMIT 1;
id             data           status         

2              bar            NEW            
step s1b: COMMIT;
step s2c: COMMIT;