f | 1 | [Path 1]: | f | 1 | [Path 1]:
n | 2 | 0: Start of execution: Beginning Search | n | 2 | 0: Start of execution: Beginning Search
| 3 | 1: Searching: query(Candidate Variable_0) |  | 3 | 1: Searching: query(Candidate Variable_0)
| 4 | 2: Searching: total_red_balls(4, Candidate Variable_1) |  | 4 | 2: Searching: total_red_balls(4, red_total)
| 5 | 3: Searching: _14514 is 4*7 |  | 5 | 3: Searching: red_total is 4*7
| 6 | 4: Found: 28 is 4*7 |  | 6 | 4: Fail: red_total is 4*7 | {'Result': 'Search Failed'}
| 7 | 5: Found: total_red_balls(4, 28) |  | 7 | 5: Fail: total_red_balls(4, red_total) | {'Result': 'Search Failed'}
| 8 | 6: Searching: total_yellow_balls(3, Candidate Variable_2) |  | 8 | 6: Fail: query(Candidate Variable_0) | {'Result': 'Search Failed'}
| 9 | 7: Searching: _16910 is 3*7 |  |  |
| 10 | 8: Found: 21 is 3*7 |  |  |
| 11 | 9: Found: total_yellow_balls(3, 21) |  |  |
| 12 | 10: Searching: difference_in_total_balls(28, 21, Candidate Variable_3) |  |  |
| 13 | 11: Searching: _5834 is 28-21 |  |  |
| 14 | 12: Found: 7 is 28-21 |  |  |
| 15 | 13: Found: difference_in_total_balls(28, 21, 7) |  |  |
| 16 | 14: Searching: difference_in_packs(7, 7, Candidate Variable_0) |  |  |
| 17 | 15: Searching: _18182 is 7//7 |  |  |
| 18 | 16: Found: 1 is 7//7 |  |  |
| 19 | 17: Found: difference_in_packs(7, 7, 1) |  |  |
| 20 | 18: Found: query(1) | {'Result': 'PackDifference = 1'} |  |  |
| 21 |  |  | 9 |
t | 22 | The code efficiently explores the logical relationships and arithmetic calculations to find the correct answer, demonstrating SWI-Prolog's capability to handle real-world problem-solving scenarios. | t |  |

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