if step > num_steps-skip_steps:
print_msg("Skipping induction in step %d.." % (step))
continue
skip_counter += 1
if skip_counter < step_size:
print_msg("Skipping induction in step %d.." % (step))
continue
skip_counter = 0
print_msg("Trying induction in step %d.." % (step))
if smt.check_sat() == "sat":
if step == 0:
print("%s Temporal induction failed!" % smt.timestamp())
print_anyconsts(num_steps)
print_failed_asserts(num_steps)
write_trace(step, num_steps+1, '%')
elif dumpall:
print_anyconsts(num_steps)
print_failed_asserts(num_steps)
write_trace(step, num_steps+1, "%d" % step)
else:
print("%s Temporal induction successful." % smt.timestamp())
retstatus = True
break
if step > num_steps-skip_steps:
print_msg("Skipping induction in step %d.." % (step))
continue
skip_counter += 1
if skip_counter < step_size:
print_msg("Skipping induction in step %d.." % (step))
continue
skip_counter = 0
print_msg("Trying induction in step %d.." % (step))
if smt.check_sat() == "sat":
if step == 0:
print("%s Temporal induction failed!" % smt.timestamp())
print_anyconsts(num_steps)
print_failed_asserts(num_steps)
write_trace(step, num_steps+1, '%')
elif dumpall:
print_anyconsts(num_steps)
print_failed_asserts(num_steps)
write_trace(step, num_steps+1, "%d" % step)
else:
print("%s Temporal induction successful." % smt.timestamp())
retstatus = True
break
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step+i))
smt_assert_consequent("(|%s_u| s%d)" % (topmod, step+i))
smt_assert_antecedent("(|%s_h| s%d)" % (topmod, step+i))
smt_assert_antecedent("(|%s_t| s%d s%d)" % (topmod, step+i-1, step+i))
smt_assert_consequent(get_constr_expr(constr_assumes, step+i))
last_check_step = step+i
if not gentrace:
if presat:
if last_check_step == step:
print_msg("Checking assumptions in step %d.." % (step))
else:
print_msg("Checking assumptions in steps %d to %d.." % (step, last_check_step))
if smt_check_sat() == "unsat":
print("%s Warmup failed!" % smt.timestamp())
retstatus = False
break
if not final_only:
if last_check_step == step:
print_msg("Checking assertions in step %d.." % (step))
else:
print_msg("Checking assertions in steps %d to %d.." % (step, last_check_step))
smt_push()
smt_assert("(not (and %s))" % " ".join(["(|%s_a| s%d)" % (topmod, i) for i in range(step, last_check_step+1)] +
[get_constr_expr(constr_asserts, i) for i in range(step, last_check_step+1)]))
if smt_check_sat() == "sat":
print("%s BMC failed!" % smt.timestamp())
