f | 1 | [Path 1]: | f | 1 | [Path 1]:
t | 2 | 0: Start of execution: Beginning Search | t | 2 | 0: Start of execution: Beginning Search
| 3 | 1: Searching: query |  | 3 | 1: Searching: query
| 4 | 2: Searching: great_uncle_aunt(tommy, rufus) |  | 4 | 2: Searching: great_uncle_aunt(tommy, rufus)
| 5 | 3: Searching: grandparent(tommy, Candidate Variable_0) |  | 5 | 3: Searching: grandparent(tommy, Candidate Variable_0)
| 6 | 4: Found: grandparent(tommy, david) |  | 6 | 4: Found: grandparent(tommy, david)
| 7 | 5: Searching: parent_child(Candidate Variable_1, david) |  | 7 | 5: Searching: parent_child(Candidate Variable_1, david)
| 8 | 6: Found: parent_child(judy, david) |  | 8 | 6: Found: parent_child(judy, david)
| 9 | 7: Searching: sibling(judy, Candidate Variable_2) |  | 9 | 7: Searching: sibling(judy, Candidate Variable_2)
| 10 | 8: Found: sibling(judy, spencer) |  | 10 | 8: Found: sibling(judy, spencer)
| 11 | 9: Searching: parent_child(spencer, rufus) |  | 11 | 9: Searching: parent_child(spencer, rufus)
| 12 | 10: Fail: parent_child(spencer, rufus) |  | 12 | 10: Fail: parent_child(spencer, rufus) | {'Result': 'Search Failed'}
| 13 | 11: Backtrack to parent_child(Candidate Variable_1, david) |  | 13 | 11: Fail: great_uncle_aunt(tommy, rufus) | {'Result': 'Search Failed'}
| 14 | 12: Redo: parent_child(Candidate Variable_1, david) |  | 14 | 12: Fail: query | {'Result': 'Search Failed'}
| 15 | 13: Found: parent_child(judy, david) |  | 15 |
| 16 | 14: Searching: sibling(judy, Candidate Variable_2) |  |  |
| 17 | 15: Found: sibling(judy, spencer) |  |  |
| 18 | 16: Searching: parent_child(spencer, rufus) |  |  |
| 19 | 17: Fail: parent_child(spencer, rufus) |  |  |
| 20 | 18: Backtrack to sibling(judy, Candidate Variable_2) |  |  |
| 21 | 19: Redo: sibling(judy, Candidate Variable_2) |  |  |
| 22 | 20: Found: sibling(judy, spencer) |  |  |
| 23 | 21: Searching: parent_child(Candidate Variable_3, rufus) |  |  |
| 24 | 22: Found: parent_child(reynaldo, rufus) |  |  |
| 25 | 23: Found: great_uncle_aunt(tommy, rufus) |  |  |
| 26 | 24: Searching: in_law(rufus, maxine) |  |  |
| 27 | 25: Searching: spouse(rufus, Candidate Variable_4) |  |  |
| 28 | 26: Found: spouse(rufus, maxine) |  |  |
| 29 | 27: Searching: sibling(maxine, rufus) |  |  |
| 30 | 28: Fail: sibling(maxine, rufus) |  |  |
| 31 | 29: Backtrack to in_law(rufus, maxine) |  |  |
| 32 | 30: Redo: in_law(rufus, maxine) |  |  |
| 33 | 31: Searching: spouse(rufus, Candidate Variable_4) |  |  |
| 34 | 32: Found: spouse(rufus, maxine) |  |  |
| 35 | 33: Searching: sibling(maxine, rufus) |  |  |
| 36 | 34: Fail: sibling(maxine, rufus) |  |  |
| 37 | 35: Found: query | {'Result': 'truth = False'} |  |  |

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