def yicesCheck(self, sessionIn, sessionOut, result):
''' Check consistency of the context. This method performs a
satisfiability check. It returns the result as a string.'''
print('yicesCheck: entry')
sid = self.session_id(sessionIn)
s_entry = self.session(sid)
mgr = s_entry['manager']
out = mgr.yices_check()
newSession = self.tick(sessionIn)
return [{sessionOut: mk_term(newSession), result: mk_term(out)}]
def yicesAssert(self, sessionIn, formula, sessionOut):
''' Assert formula into a logical context. Input has to be in
yices format. '''
print('yicesAssert: entry')
command = '(assert %s)' % formula
result = self.yices_command(sessionIn, command)
return Substitutions(self, [{sessionOut: mk_term(result)}])
def yicesInconsistent(self, sessionIn, result):
''' Passively checks consistency of the context. Only makes sense
when preceded by a call to yicesCheck. It returns the result as a string.'''
print('yicesInconsistent: entry')
sid = self.session_id(sessionIn)
s_entry = self.session(sid)
mgr = s_entry['manager']
out = mgr.yices_inconsistent()
return Substitutions(self, [{result: mk_term(out)}])
def yicesAssertNegation(self, sessionIn, formula, sessionOut):
''' Assert formula into a logical context. Input has to be in
yices format. '''
print('yicesAssertNegation: entry')
command = '(assert (not %s))' % formula
print('command: %s' % command)
result = self.yices_command(sessionIn, command)
print('after yices_command')
return [{sessionOut: mk_term(result)}]
def yicesAssertPlus(self, sessionIn, formula, sessionOut):
print('yicesAssertPlus: entry')
sid = self.session_id(sessionIn)
s_entry = self.session(sid)
mgr = s_entry['manager']
yid = mgr.yices_assert_plus(formula)
if yid != 0:
session_out = self.tick(sessionIn)
return [{sessionOut: mk_term(session_out)}]
else:
self.fail(mgr.yices_get_last_error_msg())
def yicesReset(self, sessionIn, sessionOut):
''' Reset the logical context.'''
print('yicesReset: entry')
sid = self.session_id(sessionIn)
s_entry = self.session(sid)
mgr = s_entry['manager']
result = mgr.yices_reset()
if result == 0:
self.fail(mgr.yices_get_last_error_msg())
else:
session_out = self.tick(sessionIn)
return Substitutions(self, [{sessionOut: mk_term(session_out)}])
def yicesStart(self, session):
"""
Creates a fresh Yices session with session_info initialized so that
decls is the current list of declarations, unsatcore is the unsatisfiable
core, assignment is the model, and stack is the length of the decls
at the point of the more recently scoped push.
"""
print('yicesStart: entry')
sessionOut = self.add_session('yices', {
'manager': YicesContextManager(),
'timestamp': 0
})
return Substitutions(self, [{session: mk_term(sessionOut)}])
def yicesModel(self, sessionIn, model):
print('yicesModel: entry')
sid = self.session_id(sessionIn)
s_entry = self.session(sid)
mgr = s_entry['manager']
assignment = mgr.yices_assignment()
print('assignment: %s' % assignment)
vars = [var for var in assignment]
out = ''
for var in vars:
out += '(= %s %s)' % (var, assignment[var])
out = '(and %s)' % out
print('model %s' % out)
return Substitutions(self, [{model: mk_term(out)}])
def yicesIncludeFile(self, sessionIn, file, sessionOut):
print('yicesIncludeFile: entry')
sid = self.session_id(sessionIn)
print('sid: %s' % sid)
s_entry = self.session(sid)
print('s_entry: %s' % s_entry)
mgr = s_entry['manager']
print('mgr: %s' % mgr)
print('file: %s' % file)
print('filename: %s' % file['file'])
yid = mgr.yices_include(file['file'])
print('yid: %s' % yid)
if yid != 0:
session_out = self.tick(sessionIn)
return Substitutions(self, [{sessionOut: mk_term(session_out)}])
else:
self.fail(mgr.yices_get_last_error_msg())
def yicesPop(sessionIn, sessionOut):
''' Remove the top level from the assertion stack.'''
print('yicesPop: entry')
result = self.yices_pop(sessionIn)
return Substitutions(self, [{sessionOut: mk_term(result)}])
def yicesPush(self, sessionIn, sessionOut):
''' Create a new level on the assertion stack.'''
print('yicesPush: entry')
result = self.yices_push(sessionIn)
return Substitutions(self, [{sessionOut: mk_term(result)}])
def nil(self, v):
if v.is_var():
return Substitutions(self, [self.bindResult(v, mk_term([]))])
else:
return Errors(self, ["nil passed a non variable: %s" % v])
def yicesDeclare(self, sessionIn, var, type, sessionOut):
''' Define a variable. If "body is not "None" the variable
will become a yices macro. "var", "type" have to be in yices syntax.'''
print('yicesDeclare: entry')
result = self.yices_define(sessionIn, var, type)
return Substitutions(self, [{sessionOut: mk_term(result)}])
def yicesVersion(self, version):
print('finding version')
result = libyices.yices_version()
print('found version')
return Substitutions(self, [{version: mk_term(result)}])
def nil(self, v):
if v.is_var():
return Substitutions(self, [{v: mk_term([])}])
else:
return Errors(self, ["checking not supported"])
def yicesDefine(self, sessionIn, var, type, body, sessionOut):
''' Define a variable. "var", "type", and
"body" have to be in yices syntax.'''
print('yicesDefine: entry')
result = self.yices_define(sessionIn, var, type, body)
return Substitutions(self, [{sessionOut: mk_term(result)}])
def nil(self, v):
"""Bind v to the empty list"""
if v.is_var():
return Substitutions(self, [ self.bindResult(v, terms.mk_term([])) ])
else:
return Errors(self, [ "nil passed a non variable: %s" % v ])
