Cleanup

smt.py

@@ -108,12 +108,6 @@ def logic_falsification_rule_to_smt_constraints(
 class SMTLogicEncoder:
     """
     Encapsulates the SMT encoding of a logic system with a fixed carrier set size.
-
-    This class handles:
-    - Creating the SMT sorts and functions
-    - Encoding logic rules as SMT constraints
-    - Managing the solver state
-    - Converting between Model objects and SMT representations
     """
 
     def __init__(self, logic: Logic, size: int):
@@ -140,18 +134,21 @@ class SMTLogicEncoder:
         # Create operation functions
         self.operation_function_map: Dict[Operation, z3.FuncDeclRef] = {}
         for operation in logic.operations:
-            self.operation_function_map[operation] = Function(
-                operation.symbol,
-                *(self.carrier_sort for _ in range(operation.arity + 1))
-            )
+            self.operation_function_map[operation] = self.create_function(operation.symbol, operation.arity)
 
         # Create designation function
-        self.is_designated = Function("D", self.carrier_sort, BoolSort(ctx=self.ctx))
+        self.is_designated = self.create_predicate("D", 1)
 
         # Add logic rules as constraints
         self._add_logic_constraints()
         self._add_designation_symmetry_constraints()
 
+    def create_predicate(self, name: str, arity: int) -> z3.FuncDeclRef:
+        return Function(name, *(self.carrier_sort for _ in range(arity)), BoolSort(ctx=self.ctx))
+
+    def create_function(self, name: str, arity: int) -> z3.FuncDeclRef:
+        return Function(name, *(self.carrier_sort for _ in range(arity + 1)))
+
     def _add_logic_constraints(self):
         """Add all logic rules and falsification rules as SMT constraints."""
         # Add regular rules
@@ -177,12 +174,6 @@ class SMTLogicEncoder:
     def extract_model(self, smt_model) -> Model:
         """
         Extract a Model object from an SMT model.
-
-        Args:
-            smt_model: The Z3 model to extract from
-
-        Returns:
-            A Model object representing the logic model
         """
         carrier_set = {ModelValue(f"{i}") for i in range(self.size)}
 
@@ -281,10 +272,6 @@ class SMTLogicEncoder:
             return self.extract_model(self.solver.model())
         return None
 
-    def reset(self):
-        """Reset the solver state."""
-        self.solver.reset()
-
     def __del__(self):
         """Cleanup resources."""
         try:
@@ -377,3 +364,11 @@ class SMTModelEncoder:
             smt_inputs = tuple(self.model_value_to_smt[inp] for inp in inputs)
             smt_output = self.model_value_to_smt[output]
             self.solver.add(smt_fn(*smt_inputs) == smt_output)
+
+    def __del__(self):
+        """Cleanup resources."""
+        try:
+            self.solver.reset()
+            del self.ctx
+        except:
+            pass