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maxsat

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This commit is contained in:
Artur Meski
2017-09-17 20:57:45 +01:00
parent 9501feeb7e
commit 687b1c9cab
2 changed files with 42 additions and 24 deletions
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64
smt/smt_checker_rsc_param.py
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@@ -21,7 +21,7 @@ def z3_max(a, b):
class SmtCheckerRSCParam(object):
def __init__(self, rsca):
def __init__(self, rsca, optimise=False):
rsca.sanity_check()
@@ -30,6 +30,8 @@ class SmtCheckerRSCParam(object):
self.rs = rsca.rs
self.ca = rsca.ca
self.optimise = optimise
self.initialise()
@@ -59,7 +61,11 @@ class SmtCheckerRSCParam(object):
# improducible - entities that are never produces (there is no reaction that produces that entity)
self.loop_position = Int("loop_position")
self.solver = Solver() #For("QF_FD")
if self.optimise:
self.solver = Optimize()
else:
self.solver = Solver() #For("QF_FD")
self.verification_time = None
@@ -205,6 +211,12 @@ class SmtCheckerRSCParam(object):
enc_non_empty = simplify(And(enc_non_empty, enc_param_at_least_one))
return simplify(And(enc_param_gz, enc_non_empty))
def assert_param_optimisation(self):
for param_vars in self.v_param.values():
for pvar in param_vars:
self.solver.add_soft(pvar < 1)
def enc_concentration_levels_assertion(self, level):
"""
@@ -452,7 +464,6 @@ class SmtCheckerRSCParam(object):
return enc_trans
def enc_exact_state(self, level, state):
"""Encodes the state at the given level with the exact concentration values"""
@@ -583,19 +594,22 @@ class SmtCheckerRSCParam(object):
start = resource.getrusage(resource.RUSAGE_SELF).ru_utime
self.prepare_all_variables()
self.solver.add(self.enc_init_state(0))
self.solver_add(self.enc_init_state(0))
self.current_level = 0
self.prepare_all_variables()
self.solver.add(self.enc_concentration_levels_assertion(0))
self.solver.add(self.enc_param_concentration_levels_assertion())
self.solver_add(self.enc_concentration_levels_assertion(0))
self.solver_add(self.enc_param_concentration_levels_assertion())
if self.optimise:
self.assert_param_optimisation()
encoder = rsLTL_Encoder(self)
while True:
self.prepare_all_variables()
self.solver.add(
self.solver_add(
self.enc_concentration_levels_assertion(
self.current_level + 1))
@@ -619,11 +633,11 @@ class SmtCheckerRSCParam(object):
"] Adding the formula to the solver...")
encoder.flush_cache()
self.solver.add(f)
self.solver_add(f)
print("[" + colour_str(C_BOLD, "i") +
"] Adding the loops encoding...")
self.solver.add(self.get_loop_encodings())
self.solver_add(self.get_loop_encodings())
result = self.solver.check()
if result == sat:
@@ -642,7 +656,7 @@ class SmtCheckerRSCParam(object):
print("[" + colour_str(C_BOLD, "i") +
"] Unrolling the transition relation")
self.solver.add(self.enc_transition_relation(self.current_level))
self.solver_add(self.enc_transition_relation(self.current_level))
print(
"{:->70}".format("[ level=" + str(self.current_level) + " done ]"))
@@ -668,7 +682,6 @@ class SmtCheckerRSCParam(object):
repr(
resource.getrusage(resource.RUSAGE_SELF).ru_maxrss /
(1024 * 1024)) + " MB"))
def dummy_unroll(self, levels):
"""Unrolls the variables for testing purposes"""
@@ -680,7 +693,6 @@ class SmtCheckerRSCParam(object):
print(C_MARK_INFO + " Dummy Unrolling done.")
def state_equality(self, level_A, level_B):
"""Encodes equality of two states at two different levels"""
@@ -693,8 +705,7 @@ class SmtCheckerRSCParam(object):
eq_enc_ctxaut = self.ca_state[level_A] == self.ca_state[level_B]
eq_enc = simplify(And(eq_enc, eq_enc_ctxaut))
return eq_enc
return eq_enc
def get_loop_encodings(self):
@@ -713,8 +724,15 @@ class SmtCheckerRSCParam(object):
loop_enc = simplify(And(loop_enc, Implies( loop_var == i, self.state_equality(i-1, k) )))
return loop_enc
def solver_add(self, expression):
if expression == False:
raise RuntimeError("Trying to assert False.")
if not (expression == True):
self.solver.add(expression)
def check_reachability(self, state, print_witness=True,
print_time=True, print_mem=True, max_level=1000):
"""Main testing function"""
@@ -726,16 +744,16 @@ class SmtCheckerRSCParam(object):
start = resource.getrusage(resource.RUSAGE_SELF).ru_utime
self.prepare_all_variables()
self.solver.add(self.enc_init_state(0))
self.solver_add(self.enc_init_state(0))
self.current_level = 0
self.prepare_all_variables()
self.solver.add(self.enc_concentration_levels_assertion(0))
self.solver_add(self.enc_concentration_levels_assertion(0))
while True:
self.prepare_all_variables()
self.solver.add(self.enc_concentration_levels_assertion(self.current_level+1))
self.solver_add(self.enc_concentration_levels_assertion(self.current_level+1))
print("\n{:-^70}".format("[ Working at level=" + str(self.current_level) + " ]"))
stdout.flush()
@@ -744,7 +762,7 @@ class SmtCheckerRSCParam(object):
print("[" + colour_str(C_BOLD, "i") + "] Adding the reachability test...")
self.solver.push()
self.solver.add(self.enc_state_with_blocking(self.current_level,state))
self.solver_add(self.enc_state_with_blocking(self.current_level,state))
result = self.solver.check()
if result == sat:
@@ -757,7 +775,7 @@ class SmtCheckerRSCParam(object):
self.solver.pop()
print("[" + colour_str(C_BOLD, "i") + "] Unrolling the transition relation")
self.solver.add(self.enc_transition_relation(self.current_level))
self.solver_add(self.enc_transition_relation(self.current_level))
print("{:->70}".format("[ level=" + str(self.current_level) + " done ]"))
self.current_level += 1
@@ -790,7 +808,7 @@ class SmtCheckerRSCParam(object):
self.prepare_all_variables()
init_s = self.enc_init_state(0)
print(init_s)
self.solver.add(init_s)
self.solver_add(init_s)
self.current_level = 0
self.prepare_all_variables()
@@ -808,7 +826,7 @@ class SmtCheckerRSCParam(object):
s = self.enc_min_state(self.current_level,state)
print("Test: ", s)
self.solver.add(s)
self.solver_add(s)
result = self.solver.check()
if result == sat:
@@ -822,7 +840,7 @@ class SmtCheckerRSCParam(object):
print("[i] Unrolling the transition relation")
t = self.enc_transition_relation(self.current_level)
print(t)
self.solver.add(t)
self.solver_add(t)
print("-----[ level=" + str(self.current_level) + " done ]")
self.current_level += 1