def _check_invariant(self, syscall, lemma):
inv = getattr(spec, 'spec_lemma_{}'.format(lemma))
args = syscall_spec.get_syscall_args(syscall)
kwargs = {}
if 'syscall' in inspect.getargspec(inv)[0]:
kwargs['syscall'] = syscall
if 'oldstate' in inspect.getargspec(inv)[0]:
kwargs['oldstate'] = self.state
pre = z3.And(spec.spec_invariants(self.state),
inv(self.state, **kwargs))
self.solver.add(pre)
cond, newstate = getattr(spec, syscall)(self.state, *args)
model = self._prove(z3.And(spec.spec_invariants(newstate),
inv(newstate, **kwargs)),
pre=pre,
return_model=INTERACTIVE,
minimize=MODEL_HI)
if INTERACTIVE and model:
from ipdb import set_trace
set_trace()
def _check_corollary(self, pre, post):
pre = getattr(spec, 'spec_lemma_{}'.format(pre))
post = getattr(spec, 'spec_corollary_{}'.format(post))
self._prove(z3.Implies(z3.And(pre(self.state), spec.spec_invariants(self.state)),
post(self.state)))
self.setUp()
self.state = self.state.initial()
print "main.py.HV6TopLemmas._check_corollary: self.state:{}".format(self.state)
constraints = z3.And(spec.spec_invariants(self.state), post(self.state))
self.solver.add(constraints)
self.assertEquals(self.solver.check(), z3.sat)
def _check_initial(self, lemma):
self.state = self.state.initial()
inv = getattr(spec, 'spec_lemma_{}'.format(lemma))
constraints = z3.And(spec.spec_invariants(self.state), inv(self.state))
self.solver.add(constraints)
self.assertEquals(self.solver.check(), z3.sat)