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Only Discard Subalgebras with T in Right or B in Left

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Brandon Rozek 2024-11-12 15:22:18 -05:00 • committed by GitHub
commit 6317dc054f
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2 changed files with 17 additions and 27 deletions
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26
model.py
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@ -219,7 +219,7 @@ def satisfiable(logic: Logic, model: Model, interpretation: Dict[Operation, Mode
def model_closure(initial_set: Set[ModelValue], mfunctions: Set[ModelFunction], top: Optional[ModelValue], bottom: Optional[ModelValue]) -> Set[ModelValue]:
def model_closure(initial_set: Set[ModelValue], mfunctions: Set[ModelFunction], forbidden_element: Optional[ModelValue]) -> Set[ModelValue]:
"""
Given an initial set of model values and a set of model functions,
compute the complete set of model values that are closed
@ -230,7 +230,7 @@ def model_closure(initial_set: Set[ModelValue], mfunctions: Set[ModelFunction],
closure_set: Set[ModelValue] = initial_set
last_new: Set[ModelValue] = initial_set
changed: bool = True
topbottom_found = False
forbidden_found = False
while changed:
changed = False
@ -256,14 +256,11 @@ def model_closure(initial_set: Set[ModelValue], mfunctions: Set[ModelFunction],
# Optimization: Break out of computation
# early when top or bottom element is foun
if top is not None and element == top:
topbottom_found = True
if bottom is not None and element == bottom:
topbottom_found = True
if topbottom_found:
if forbidden_element is not None and element == forbidden_element:
forbidden_found = True
break
if topbottom_found:
if forbidden_found:
break
# We don't need to compute the arguments
@ -291,17 +288,14 @@ def model_closure(initial_set: Set[ModelValue], mfunctions: Set[ModelFunction],
# Optimization: Break out of computation
# early when top or bottom element is foun
if top is not None and element == top:
topbottom_found = True
if bottom is not None and element == bottom:
topbottom_found = True
if topbottom_found:
if forbidden_element is not None and element == forbidden_element:
forbidden_found = True
break
if topbottom_found:
if forbidden_found:
break
if topbottom_found:
if forbidden_found:
break
@ -309,7 +303,7 @@ def model_closure(initial_set: Set[ModelValue], mfunctions: Set[ModelFunction],
changed = len(new_elements) > 0
last_new = new_elements
if topbottom_found:
if forbidden_found:
break
return closure_set

18
vsp.py
View file

@ -145,30 +145,28 @@ def has_vsp(model: Model, interpretation: Dict[Operation, ModelFunction]) -> VSP
continue
# NOTE: Optimization
# if either subalgebra contains top or bottom, move
# onto the next pair
if top is not None and (top in xs or top in ys):
# If the left subalgebra contains bottom
# or the right subalgebra contains top
# skip this pair
if top is not None and top in ys:
continue
if bottom is not None and (bottom in xs or bottom in ys):
if bottom is not None and bottom in xs:
continue
# Compute the closure of all operations
# with just the xs
carrier_set_left: Set[ModelValue] = model_closure(xs, model.logical_operations, top, bottom)
carrier_set_left: Set[ModelValue] = model_closure(xs, model.logical_operations, bottom)
# Save to cache
if cached_xs[0] is not None and not cached_ys[1]:
closure_cache.append((orig_xs, carrier_set_left))
if top is not None and top in carrier_set_left:
continue
if bottom is not None and bottom in carrier_set_left:
continue
# Compute the closure of all operations
# with just the ys
carrier_set_right: Set[ModelValue] = model_closure(ys, model.logical_operations, top, bottom)
carrier_set_right: Set[ModelValue] = model_closure(ys, model.logical_operations, top)
# Save to cache
if cached_ys[0] is not None and not cached_ys[1]:
@ -176,8 +174,6 @@ def has_vsp(model: Model, interpretation: Dict[Operation, ModelFunction]) -> VSP
if top is not None and top in carrier_set_right:
continue
if bottom is not None and bottom in carrier_set_right:
continue
# If the carrier set intersects, then move on to the next
# subalgebra