def smtlibscript_from_formula(formula, logic=None):
script = SmtLibScript()
if logic is None:
# Get the simplest SmtLib logic that contains the formula
f_logic = get_logic(formula)
smt_logic = None
try:
smt_logic = get_closer_smtlib_logic(f_logic)
except NoLogicAvailableError:
warnings.warn("The logic %s is not reducible to any SMTLib2 " \
"standard logic. Proceeding with non-standard " \
"logic '%s'" % (f_logic, f_logic),
stacklevel=3)
smt_logic = f_logic
elif not (isinstance(logic, Logic) or isinstance(logic, str)):
raise UndefinedLogicError(str(logic))
else:
if logic not in SMTLIB2_LOGICS:
warnings.warn("The logic %s is not reducible to any SMTLib2 " \
"standard logic. Proceeding with non-standard " \
"logic '%s'" % (logic, logic),
stacklevel=3)
smt_logic = logic
script.add(name=smtcmd.SET_LOGIC, args=[smt_logic])
# Declare all types
types = get_env().typeso.get_types(formula, custom_only=True)
for type_ in types:
script.add(name=smtcmd.DECLARE_SORT, args=[type_.decl])
deps = formula.get_free_variables()
# Declare all variables
for symbol in deps:
assert symbol.is_symbol()
script.add(name=smtcmd.DECLARE_FUN, args=[symbol])
# Assert formula
script.add_command(SmtLibCommand(name=smtcmd.ASSERT, args=[formula]))
# check-sat
script.add_command(SmtLibCommand(name=smtcmd.CHECK_SAT, args=[]))
return script
def get_logic_by_name(name):
"""Returns the Logic that matches the provided name."""
for logic in LOGICS:
if logic.name.lower() == name.lower(): return logic
raise UndefinedLogicError(name)