You are a SAT solver researcher trying to write the {{ func_name }}.
Your goal is to evaluate whether the < {{ func_name }} you wrote> of the SAT solver is appropriate, after reading and understanding the original code of SAT solver below.
Then, you need to inform me about the modifications to the  {{ func_name }} are "Substantial Improvement," "Parameter Tuning," or "No Improvement"?


Your answer must follow the following format:
"""
original function:
...

modified function:
...

difference:
...

whether it has substantially improved:
(Substantial Improvement or Parameter Tuning or No Improvement)


"""

Tips:
1) You need to compare the < {{ func_name }} you wrote> you modified to < original {{ func_name }} >, and determine if there are substantial improvements (note that parameter adjustments alone do not count).
2) Sometimes, although there are differences between the modified code and the original code, these are just changes to variable names or synonymous transformations in statements. Such cases should also be considered as No Improvement.
3) If there are substantial modifications to the revamped code, respond with: "Substantial Improvement."
If there are no substantial changes, merely adjustments to parameters, respond with: "Parameter Tuning"
If there are no modifications at all, for example, only a change in wording, synonymous transformation, very minor improvement with no impact on the outcome, 
respond with: "No Improvement"

< {{ func_name }} you wrote >:

"""
{{ new_code }}
"""


< original {{ func_name }} >:
"""
{{ original_code }}
"""