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working on the new encoding; backup commit

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Artur Meski
2017-03-09 23:06:44 +01:00
parent f70cc0034b
commit 97ff4baf35
3 changed files with 74 additions and 32 deletions
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58
smt/smt_checker_rsc.py
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@@ -31,6 +31,8 @@ class SmtCheckerRSC(object):
self.ca_state = []
self.next_level_to_encode = 0
self.loop_position = Int("loop_position")
self.solver = Solver()
self.verification_time = None
@@ -370,11 +372,41 @@ class SmtCheckerRSC(object):
def dummy_unroll(self, levels):
"""Unrolls the variables for testing purposes"""
for i in range(levels):
self.prepare_all_variables()
print(C_MARK_INFO + " Dummy Unrolling done.")
self.current_level = 0
for i in range(levels+1):
self.prepare_all_variables()
self.current_level += 1
print(C_MARK_INFO + " Dummy Unrolling done.")
def state_equality(self, level_A, level_B):
"""Encodes equality of two states at two different levels"""
eq_enc = True
print(level_A, level_B, self.current_level)
print(len(self.v), self.v)
for e_i in range(len(self.rs.background_set)):
e_i_equality = self.v[level_A][e_i] == self.v[level_B][e_i]
eq_enc = simplify(And(eq_enc, e_i_equality))
return eq_enc
def get_loop_encodings(self):
k = self.current_level-1 # TODO: cos jest pokichane z tymi indeksami. sprawdzic. zasypiam.
loop_var = self.loop_position
loop_k = True
for i in range(1,k+1):
loop_k = simplify(And(loop_k, Implies( loop_var == i, self.state_equality(i-1, k) )))
loop_enc = loop_k
return loop_enc
def check_reachability(self, state, print_witness=True,
print_time=True, print_mem=True, max_level=1000):
"""Main testing function"""
@@ -445,43 +477,43 @@ class SmtCheckerRSC(object):
init_s = self.enc_init_state(0)
print(init_s)
self.solver.add(init_s)
current_level = 0
self.current_level = 0
self.prepare_all_variables()
while True:
self.prepare_all_variables()
print("-----[ Working at level=" + str(current_level) + " ]-----")
print("-----[ Working at level=" + str(self.current_level) + " ]-----")
stdout.flush()
# reachability test:
print("[i] Adding the reachability test...")
self.solver.push()
s = self.enc_min_state(current_level,state)
s = self.enc_min_state(self.current_level,state)
print("Test: ", s)
self.solver.add(s)
result = self.solver.check()
if result == sat:
print("\n[+] " + colour_str(C_RED, "SAT at level=" + str(current_level)))
print("\n[+] " + colour_str(C_RED, "SAT at level=" + str(self.current_level)))
if print_witness:
self.decode_witness(current_level)
self.decode_witness(self.current_level)
break
else:
self.solver.pop()
print("[i] Unrolling the transition relation")
t = self.enc_transition_relation(current_level)
t = self.enc_transition_relation(self.current_level)
print(t)
self.solver.add(t)
print("-----[ level=" + str(current_level) + " done ]")
current_level += 1
print("-----[ level=" + str(self.current_level) + " done ]")
self.current_level += 1
if current_level > max_level:
if self.current_level > max_level:
print("Stopping at level=" + str(max_level))
break
else: