Error: execution plan for version 3 in file execution_plan.dl at line 21
        .plan 1: (1,2,3), 2: (3,2,1), 3: (2,3,1)
-----------------------------------------^-------
only versions 0..2 permitted
Error: Invalid execution order in plan (incomplete) in file execution_plan.dl at line 25
        .plan 0: (1,2,2), 1: (3,2), 2: (2,3,1,3)
-----------------^-------------------------------
Error: Invalid execution order in plan (expected 3 atoms, not 2) in file execution_plan.dl at line 25
        .plan 0: (1,2,2), 1: (3,2), 2: (2,3,1,3)
-----------------------------^-------------------
Error: Invalid execution order in plan (expected 3 atoms, not 4) in file execution_plan.dl at line 25
        .plan 0: (1,2,2), 1: (3,2), 2: (2,3,1,3)
---------------------------------------^---------
Error: Ignored execution plan for non-recursive clause in file execution_plan.dl at line 31
        .plan 0:(1,2,3)
----------------^-------
Error: Invalid execution order in plan (expected 2 atoms, not 3) in file execution_plan.dl at line 46
        .plan 0:(1,2,3)
----------------^-------
Error: Invalid execution order in plan (incomplete) in file execution_plan.dl at line 50
        .plan 0:(1,3)
----------------^-----
7 errors generated, evaluation aborted
