def build(field_model_l: [FieldModel],
constraint_l: [ConstraintModel],
rng=None) -> RandInfo:
if rng is None:
rng = Random()
builder = RandInfoBuilder(rng)
# First, collect all the fields
builder._pass = 0
for fm in field_model_l:
fm.accept(builder)
# Now, build the randset
builder._pass = 1
builder._used_rand = True
# Visit the field objects passed in, as well
# as their constraints
for fm in field_model_l:
fm.accept(builder)
# Visit standalone constraints passed to the function
for c in constraint_l:
c.accept(builder)
# for rs in builder._randset_s:
# print("RS: " + str(rs))
# for c in rs.constraint_s:
# print("RS Constraint: " + str(c))
return RandInfo(list(builder._randset_s), list(builder._field_s))
def swizzle_randvars(self, btor: Boolector, ri: RandInfo, start_rs: int,
end_rs: int, bound_m: Dict[FieldModel,
VariableBoundModel]):
# TODO: we must ignore fields that are otherwise being controlled
rand_node_l = []
x = start_rs
while x < end_rs:
# For each random variable, select a partition with it's known
# domain and add the corresponding constraint
rs = ri.randsets()[x]
field_l = rs.fields_l()
if len(field_l) == 1:
# Go ahead and pick values in the domain, since there
# are no other constraints
f = field_l[0]
e = self.create_single_var_domain_constraint(
field_l[0], bound_m[field_l[0]])
if e is not None:
n = e.build(btor)
rand_node_l.append(n)
# btor.Assume(n)
else:
for f in field_l:
if f.is_used_rand and f in bound_m.keys():
f_bound = bound_m[f]
if not f_bound.isEmpty():
e = self.create_rand_domain_constraint(f, f_bound)
if e is not None:
n = e.build(btor)
rand_node_l.append(n)
# btor.Assume(n)
else:
# It's always possible that this value is already fixed.
# Just ignore.
# rand_node_l.append(None)
pass
x += 1
if len(rand_node_l) > 0:
btor.Assume(*rand_node_l)
if btor.Sat() != btor.SAT:
# Remove any failing assumptions
n_failed = 0
for i, n in enumerate(rand_node_l):
if n is not None and btor.Failed(n):
rand_node_l[i] = None
n_failed += 1
# Re-apply the constraints that succeeded
btor.Assume(*filter(lambda n: n is not None, rand_node_l))
if btor.Sat() != btor.SAT:
raise Exception("failed to add in randomization")
def build(field_model_l: [FieldModel],
constraint_l: [ConstraintModel],
rng=None) -> RandInfo:
if rng is None:
# rng = Random()
rng = random
builder = RandInfoBuilder(rng)
# First, collect all the fields
builder._pass = 0
for fm in field_model_l:
fm.accept(builder)
builder._randset_s.clear()
builder._randset_field_m.clear()
# Create rand sets around explicitly-ordered fields
for i, o in enumerate(builder._order_l):
s = RandSet(i)
s.field_s.add(o)
builder._randset_s.add(s)
builder._randset_field_m[o] = s
# Now, build the randset
builder._pass = 1
builder._used_rand = True
# Visit the field objects passed in, as well
# as their constraints
for fm in field_model_l:
fm.accept(builder)
# Visit standalone constraints passed to the function
for c in constraint_l:
c.accept(builder)
# for rs in builder._randset_s:
# print("RS: " + str(rs))
# for c in rs.constraint_s:
# print("RS Constraint: " + str(c))
randset_l = list(builder._randset_s)
randset_l.sort(key=lambda e: e.order)
return RandInfo(randset_l, list(builder._field_s))
def randomize(self, ri: RandInfo, bound_m: Dict[FieldModel,
VariableBoundModel]):
"""Randomize the variables and constraints in a RandInfo collection"""
# for rs in ri.randsets():
# print("RandSet")
# for f in rs.all_fields():
# print(" " + f.name + " " + str(bound_m[f].domain.range_l))
# for uf in ri.unconstrained():
# print("Unconstrained: " + uf.name)
rs_i = 0
start_rs_i = 0
max_fields = 20
while rs_i < len(ri.randsets()):
btor = Boolector()
self.btor = btor
btor.Set_opt(pyboolector.BTOR_OPT_INCREMENTAL, True)
btor.Set_opt(pyboolector.BTOR_OPT_MODEL_GEN, True)
start_rs_i = rs_i
constraint_l = []
# Collect up to max_fields fields to randomize at a time
n_fields = 0
while rs_i < len(ri.randsets()):
rs = ri.randsets()[rs_i]
try:
for f in rs.all_fields():
f.build(btor)
n_fields += 1
except Exception as e:
for c in rs.constraints():
print("Constraint: " + self.pretty_printer.do_print(c))
raise e
constraint_l.extend(
list(
map(
lambda c: (c, c.build(btor),
isinstance(c, ConstraintSoftModel)),
rs.constraints())))
rs_i += 1
if n_fields > max_fields:
break
for c in constraint_l:
try:
btor.Assume(c[1])
except Exception as e:
from ..visitors.model_pretty_printer import ModelPrettyPrinter
print("Exception: " + ModelPrettyPrinter.print(c[0]))
raise e
soft_node_l = list(
map(lambda c: c[1], filter(lambda c: c[2], constraint_l)))
node_l = list(
map(lambda c: c[1], filter(lambda c: not c[2], constraint_l)))
# Perform an initial solve to establish correctness
if btor.Sat() != btor.SAT:
if len(soft_node_l) > 0:
# Try one more time before giving up
for i, f in enumerate(btor.Failed(*soft_node_l)):
if f:
soft_node_l[i] = None
# Add back the hard-constraint nodes and soft-constraints that
# didn't fail
for n in filter(lambda n: n is not None,
node_l + soft_node_l):
btor.Assume(n)
# If we fail again, then we truly have a problem
if btor.Sat() != btor.SAT:
# Ensure we clean up
x = start_rs_i
while x < rs_i:
rs = ri.randsets()[x]
for f in rs.all_fields():
f.dispose()
x += 1
raise Exception("solve failure")
else:
# Still need to convert assumptions to assertions
for n in filter(lambda n: n is not None,
node_l + soft_node_l):
btor.Assert(n)
else:
print("Failed constraints:")
i = 1
for c in constraint_l:
if btor.Failed(c[1]):
print("[" + str(i) + "]: " +
self.pretty_printer.do_print(c[0], False))
print("[" + str(i) + "]: " +
self.pretty_printer.do_print(c[0], True))
i += 1
# Ensure we clean up
for rs in ri.randsets():
for f in rs.all_fields():
f.dispose()
print("Solve failure")
raise Exception("solve failure")
else:
# Still need to convert assumptions to assertions
btor.Assert(*(node_l + soft_node_l))
self.swizzle_randvars(btor, ri, start_rs_i, rs_i, bound_m)
# Finalize the value of the field
x = start_rs_i
while x < rs_i:
rs = ri.randsets()[x]
for f in rs.all_fields():
f.post_randomize()
f.dispose(
) # Get rid of the solver var, since we're done with it
x += 1
uc_rand = list(filter(lambda f: f.is_used_rand, ri.unconstrained()))
for uf in uc_rand:
bounds = bound_m[uf]
range_l = bounds.domain.range_l
if len(range_l) == 1:
# Single (likely domain-based) range
uf.set_val(self.randint(range_l[0][0], range_l[0][1]))
else:
# Most likely an enumerated type
# TODO: are there any cases where these could be ranges?
idx = self.randint(0, len(range_l) - 1)
uf.set_val(range_l[idx][0])
def randomize(self, ri : RandInfo, bound_m : Dict[FieldModel,VariableBoundModel]):
"""Randomize the variables and constraints in a RandInfo collection"""
if self.debug > 0:
for rs in ri.randsets():
print("RandSet")
for f in rs.all_fields():
if f in bound_m.keys():
print(" Field: " + f.fullname + " " + str(bound_m[f].domain.range_l))
for c in rs.constraints():
print(" Constraint: " + self.pretty_printer.do_print(c, show_exp=True))
for uf in ri.unconstrained():
print("Unconstrained: " + uf.name)
# Assign values to the unconstrained fields first
uc_rand = list(filter(lambda f:f.is_used_rand, ri.unconstrained()))
for uf in uc_rand:
if self.debug > 0:
print("Randomizing unconstrained: " + uf.fullname)
bounds = bound_m[uf]
range_l = bounds.domain.range_l
if len(range_l) == 1:
# Single (likely domain-based) range
uf.set_val(
self.randint(range_l[0][0], range_l[0][1]))
else:
# Most likely an enumerated type
# TODO: are there any cases where these could be ranges?
idx = self.randint(0, len(range_l)-1)
uf.set_val(range_l[idx][0])
# Lock so we don't overwrite
uf.set_used_rand(False)
rs_i = 0
start_rs_i = 0
max_fields = 20
while rs_i < len(ri.randsets()):
btor = Boolector()
self.btor = btor
btor.Set_opt(pyboolector.BTOR_OPT_INCREMENTAL, True)
btor.Set_opt(pyboolector.BTOR_OPT_MODEL_GEN, True)
start_rs_i = rs_i
constraint_l = []
# Collect up to max_fields fields to randomize at a time
n_fields = 0
while rs_i < len(ri.randsets()):
rs = ri.randsets()[rs_i]
rs_node_builder = RandSetNodeBuilder(btor)
all_fields = rs.all_fields()
if self.debug > 0:
print("Pre-Randomize: RandSet")
for f in all_fields:
if f in bound_m.keys():
print(" Field: " + f.fullname + " " + str(bound_m[f].domain.range_l))
for c in rs.constraints():
print(" Constraint: " + self.pretty_printer.do_print(c, show_exp=True, print_values=True))
rs_node_builder.build(rs)
n_fields += len(all_fields)
constraint_l.extend(list(map(lambda c:(c,c.build(btor),isinstance(c,ConstraintSoftModel)), rs.constraints())))
rs_i += 1
if n_fields > max_fields or rs.order != -1:
break
for c in constraint_l:
try:
btor.Assume(c[1])
except Exception as e:
from ..visitors.model_pretty_printer import ModelPrettyPrinter
print("Exception: " + ModelPrettyPrinter.print(c[0]))
raise e
soft_node_l = list(map(lambda c:c[1], filter(lambda c:c[2], constraint_l)))
node_l = list(map(lambda c:c[1], filter(lambda c:not c[2], constraint_l)))
# Perform an initial solve to establish correctness
if btor.Sat() != btor.SAT:
if len(soft_node_l) > 0:
# Try one more time before giving up
for i,f in enumerate(soft_node_l):
if btor.Failed(f):
soft_node_l[i] = None
# Add back the hard-constraint nodes and soft-constraints that
# didn't fail
# for n in filter(lambda n:n is not None, node_l+soft_node_l):
for n in filter(lambda n:n is not None, node_l):
btor.Assume(n)
for n in filter(lambda n:n is not None, soft_node_l):
btor.Assume(n)
# If we fail again, then we truly have a problem
if btor.Sat() != btor.SAT:
# Ensure we clean up
# active_randsets = []
# x=start_rs_i
# while x < rs_i:
# rs = ri.randsets()[x]
# active_randsets.append(rs)
# for f in rs.all_fields():
# f.dispose()
# x += 1
active_randsets = []
for rs in ri.randsets():
active_randsets.append(rs)
for f in rs.all_fields():
f.dispose()
raise SolveFailure(
"solve failure",
self.create_diagnostics(active_randsets))
# raise SolveFailure(
# "solve failure",
# self.create_diagnostics(active_randsets))
else:
# Still need to convert assumptions to assertions
for n in filter(lambda n:n is not None, node_l+soft_node_l):
btor.Assert(n)
else:
# print("Failed constraints:")
# i=1
# for c in constraint_l:
# if btor.Failed(c[1]):
# print("[" + str(i) + "]: " + self.pretty_printer.do_print(c[0], False))
# print("[" + str(i) + "]: " + self.pretty_printer.do_print(c[0], True))
# i+=1
# Ensure we clean up
active_randsets = []
for rs in ri.randsets():
active_randsets.append(rs)
for f in rs.all_fields():
f.dispose()
raise SolveFailure(
"solve failure",
self.create_diagnostics(active_randsets))
else:
# Still need to convert assumptions to assertions
btor.Assert(*(node_l+soft_node_l))
self.swizzle_randvars(btor, ri, start_rs_i, rs_i, bound_m)
# Finalize the value of the field
x = start_rs_i
reset_v = DynamicExprResetVisitor()
while x < rs_i:
rs = ri.randsets()[x]
for f in rs.all_fields():
f.post_randomize()
f.set_used_rand(False, 0)
f.dispose() # Get rid of the solver var, since we're done with it
f.accept(reset_v)
# for f in rs.nontarget_field_s:
# f.dispose()
for c in rs.constraints():
c.accept(reset_v)
RandSetDisposeVisitor().dispose(rs)
x += 1
end = int(round(time.time() * 1000))
def swizzle_randvars(self,
btor : Boolector,
ri : RandInfo,
start_rs : int,
end_rs : int,
bound_m : Dict[FieldModel,VariableBoundModel]):
# TODO: we must ignore fields that are otherwise being controlled
if self.debug > 0:
print("--> swizzle_randvars")
rand_node_l = []
rand_e_l = []
x=start_rs
while x < end_rs:
# For each random variable, select a partition with it's known
# domain and add the corresponding constraint
rs = ri.randsets()[x]
field_l = rs.rand_fields()
if self.debug > 0:
print(" " + str(len(field_l)) + " fields in randset")
if len(field_l) == 1:
# Go ahead and pick values in the domain, since there
# are no other constraints
f = field_l[0]
if f in bound_m.keys():
f_bound = bound_m[f]
if not f_bound.isEmpty():
e = self.create_rand_domain_constraint(f, f_bound)
if e is not None:
n = e.build(btor)
rand_node_l.append(n)
rand_e_l.append(e)
elif len(field_l) > 0:
field_idx = self.randint(0, len(field_l)-1)
f = field_l[field_idx]
if self.debug > 0:
print("Swizzling field " + f.name)
if f in bound_m.keys():
f_bound = bound_m[f]
if not f_bound.isEmpty():
e = self.create_rand_domain_constraint(f, f_bound)
if e is not None:
n = e.build(btor)
rand_node_l.append(n)
rand_e_l.append(e)
# btor.Assume(n)
else:
# It's always possible that this value is already fixed.
# Just ignore.
# rand_node_l.append(None)
pass
else:
if self.debug > 0:
print("Note: no bounds found for field " + f.name)
x += 1
if len(rand_node_l) > 0:
btor.Assume(*rand_node_l)
# btor.Assert(*rand_node_l)
if btor.Sat() != btor.SAT:
# Remove any failing assumptions
if self.debug > 0:
print("Randomization constraint failed")
n_failed = 0
for i,n in enumerate(rand_node_l):
if n is not None and btor.Failed(n):
rand_node_l[i] = None
n_failed += 1
# Sanity check
if n_failed == 0:
for e in rand_e_l:
print("Constraint: " + ModelPrettyPrinter.print(e))
raise Exception("UNSAT reported, but no failing assertions")
#
# Re-apply the constraints that succeeded
btor.Assert(*filter(lambda n:n is not None, rand_node_l))
if btor.Sat() != btor.SAT:
raise Exception("failed to add in randomization (2)")
else:
if btor.Sat() != btor.SAT:
raise Exception("failed to add in randomization")
if self.debug > 0:
print("<-- swizzle_randvars")
def randomize(self, ri: RandInfo, bound_m: Dict[FieldModel,
VariableBoundModel]):
"""Randomize the variables and constraints in a RandInfo collection"""
if self.solve_info is not None:
self.solve_info.n_randsets = len(ri.randsets())
if self.debug > 0:
rs_i = 0
while rs_i < len(ri.randsets()):
rs = ri.randsets()[rs_i]
print("RandSet[%d]" % rs_i)
for f in rs.all_fields():
if f in bound_m.keys():
print(" Field: %s is_rand=%s %s" %
(f.fullname, str(f.is_used_rand),
str(bound_m[f].domain.range_l)))
else:
print(" Field: %s is_rand=%s (unbounded)" %
(f.fullname, str(f.is_used_rand)))
for c in rs.constraints():
print(" Constraint: " +
self.pretty_printer.do_print(c, show_exp=True))
for c in rs.soft_constraints():
print(" SoftConstraint: " +
self.pretty_printer.do_print(c, show_exp=True))
rs_i += 1
for uf in ri.unconstrained():
print("Unconstrained: " + uf.fullname)
# Assign values to the unconstrained fields first
uc_rand = list(filter(lambda f: f.is_used_rand, ri.unconstrained()))
for uf in uc_rand:
if self.debug > 0:
print("Randomizing unconstrained: " + uf.fullname)
bounds = bound_m[uf]
range_l = bounds.domain.range_l
if len(range_l) == 1:
# Single (likely domain-based) range
uf.set_val(self.randstate.randint(range_l[0][0],
range_l[0][1]))
else:
# Most likely an enumerated type
# TODO: are there any cases where these could be ranges?
idx = self.randstate.randint(0, len(range_l) - 1)
uf.set_val(range_l[idx][0])
# Lock so we don't overwrite
uf.set_used_rand(False)
rs_i = 0
start_rs_i = 0
# max_fields = 20
max_fields = 0
while rs_i < len(ri.randsets()):
btor = Boolector()
self.btor = btor
btor.Set_opt(pyboolector.BTOR_OPT_INCREMENTAL, True)
btor.Set_opt(pyboolector.BTOR_OPT_MODEL_GEN, True)
start_rs_i = rs_i
constraint_l = []
soft_constraint_l = []
# Collect up to max_fields fields to randomize at a time
n_fields = 0
while rs_i < len(ri.randsets()):
rs = ri.randsets()[rs_i]
rs_node_builder = RandSetNodeBuilder(btor)
all_fields = rs.all_fields()
if self.debug > 0:
print("Pre-Randomize: RandSet[%d]" % rs_i)
for f in all_fields:
if f in bound_m.keys():
print(" Field: %s is_rand=%s %s var=%s" %
(f.fullname, str(f.is_used_rand),
str(bound_m[f].domain.range_l), str(f.var)))
else:
print(" Field: %s is_rand=%s (unbounded)" %
(f.fullname, str(f.is_used_rand)))
for c in rs.constraints():
print(" Constraint: " + self.pretty_printer.do_print(
c, show_exp=True, print_values=True))
for c in rs.soft_constraints():
print(" SoftConstraint: " +
self.pretty_printer.do_print(
c, show_exp=True, print_values=True))
if self.solve_info is not None:
self.solve_info.n_cfields += len(all_fields)
rs_node_builder.build(rs)
n_fields += len(all_fields)
# constraint_l.extend(list(map(lambda c:(c,c.build(btor),isinstance(c,ConstraintSoftModel)), rs.constraints())))
constraint_l.extend(
list(map(lambda c: (c, c.build(btor)), rs.constraints())))
soft_constraint_l.extend(
list(
map(lambda c: (c, c.build(btor)),
rs.soft_constraints())))
# Sort the list in descending order so we know which constraints
# to prioritize
soft_constraint_l.sort(key=lambda c: c[0].priority,
reverse=True)
rs_i += 1
if n_fields > max_fields or rs.order != -1:
break
for c in constraint_l:
try:
btor.Assume(c[1])
except Exception as e:
print("Exception: " + self.pretty_printer.print(c[0]))
raise e
if self.solve_info is not None:
self.solve_info.n_sat_calls += 1
if btor.Sat() != btor.SAT:
# If the system doesn't solve with hard constraints added,
# then we may as well bail now
active_randsets = []
for rs in ri.randsets():
active_randsets.append(rs)
for f in rs.all_fields():
f.dispose()
if self.solve_fail_debug > 0:
raise SolveFailure(
"solve failure",
self.create_diagnostics(active_randsets))
else:
raise SolveFailure(
"solve failure",
"Solve failure: set 'solve_fail_debug=1' for more details"
)
else:
# Lock down the hard constraints that are confirmed
# to be valid
for c in constraint_l:
btor.Assert(c[1])
# If there are soft constraints, add these now
if len(soft_constraint_l) > 0:
for c in soft_constraint_l:
try:
btor.Assume(c[1])
except Exception as e:
from ..visitors.model_pretty_printer import ModelPrettyPrinter
print("Exception: " + ModelPrettyPrinter.print(c[0]))
raise e
if self.solve_info is not None:
self.solve_info.n_sat_calls += 1
if btor.Sat() != btor.SAT:
# All the soft constraints cannot be satisfied. We'll need to
# add them incrementally
if self.debug > 0:
print(
"Note: some of the %d soft constraints could not be satisfied"
% len(soft_constraint_l))
for c in soft_constraint_l:
btor.Assume(c[1])
if self.solve_info is not None:
self.solve_info.n_sat_calls += 1
if btor.Sat() == btor.SAT:
if self.debug > 0:
print("Note: soft constraint %s (%d) passed" %
(self.pretty_printer.print(
c[0]), c[0].priority))
btor.Assert(c[1])
else:
if self.debug > 0:
print("Note: soft constraint %s (%d) failed" %
(self.pretty_printer.print(
c[0]), c[0].priority))
else:
# All the soft constraints could be satisfied. Assert them now
if self.debug > 0:
print(
"Note: all %d soft constraints could be satisfied"
% len(soft_constraint_l))
for c in soft_constraint_l:
btor.Assert(c[1])
# btor.Sat()
x = start_rs_i
while x < rs_i:
self.swizzler.swizzle(btor, ri.randsets()[x], bound_m)
x += 1
# Finalize the value of the field
x = start_rs_i
reset_v = DynamicExprResetVisitor()
while x < rs_i:
rs = ri.randsets()[x]
for f in rs.all_fields():
f.post_randomize()
f.set_used_rand(False, 0)
f.dispose(
) # Get rid of the solver var, since we're done with it
f.accept(reset_v)
# for f in rs.nontarget_field_s:
# f.dispose()
for c in rs.constraints():
c.accept(reset_v)
RandSetDisposeVisitor().dispose(rs)
if self.debug > 0:
print("Post-Randomize: RandSet[%d]" % x)
for f in all_fields:
if f in bound_m.keys():
print(" Field: %s %s" %
(f.fullname, str(f.val.val)))
else:
print(" Field: %s (unbounded) %s" %
(f.fullname, str(f.val.val)))
for c in rs.constraints():
print(" Constraint: " + self.pretty_printer.do_print(
c, show_exp=True, print_values=True))
for c in rs.soft_constraints():
print(" SoftConstraint: " +
self.pretty_printer.do_print(
c, show_exp=True, print_values=True))
x += 1
end = int(round(time.time() * 1000))
def build(field_model_l: [FieldModel],
constraint_l: [ConstraintModel],
rng=None) -> RandInfo:
if rng is None:
# rng = Random()
rng = random
builder = RandInfoBuilder(rng)
# First, collect all the fields
builder._pass = 0
for fm in field_model_l:
fm.accept(builder)
builder._randset_m.clear()
builder._randset_l.clear()
builder._randset_field_m.clear()
# Now, build the randset
builder._pass = 1
builder._used_rand = True
# Visit the field objects passed in, as well
# as their constraints
for fm in field_model_l:
fm.accept(builder)
# Visit standalone constraints passed to the function
for c in constraint_l:
c.accept(builder)
randset_l = list(filter(lambda e: e is not None, builder._randset_l))
# Handle ordering constraints.
# - Collect fields that are members of this randset
# - Sort in dependency order
# - Create a randomization ordering list
if len(builder._order_m.keys()) > 0:
for rs in randset_l:
# Create an ordering list of any
rs_deps = {}
for i, f in enumerate(rs.fields()):
if f in builder._order_m.keys():
rs_deps[f] = builder._order_m[f]
if len(rs_deps) > 0:
rs.rand_order_l = []
for fs in list(toposort(rs_deps)):
field_l = []
for fi in fs:
if fi in rs.fields():
field_l.append(fi)
if len(field_l) > 0:
rs.rand_order_l.append(field_l)
# It's important to maintain a fixed order for the
# unconstrained fields, since this affects their
# randomization.
nonrand_fields = []
for f, i in builder._field_m.items():
nonrand_fields.append((i, f))
# Sort by add order
nonrand_fields.sort(key=lambda e: e[0])
return RandInfo(randset_l, list(map(lambda e: e[1], nonrand_fields)))