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yosys-smtbmc --smtc -g

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This commit is contained in:
Clifford Wolf 2016-08-24 22:09:50 +02:00
parent cd18235f30
commit ee3e7a0e45
3 changed files with 48 additions and 56 deletions
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85
backends/smt2/smtbmc.py
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@ -58,7 +58,7 @@ yosys-smtbmc [options] <yosys_smt2_output>
-m <module_name>
name of the top module
--constr <constr_filename>
--smtc <constr_filename>
read constraints file
--dump-vcd <vcd_filename>
@ -69,14 +69,14 @@ yosys-smtbmc [options] <yosys_smt2_output>
--dump-vlogtb <verilog_filename>
write trace as Verilog test bench
--dump-constr <constr_filename>
--dump-smtc <constr_filename>
write trace as constraints file
""" + so.helpmsg())
sys.exit(1)
try:
opts, args = getopt.getopt(sys.argv[1:], so.shortopts + "t:u:S:igm:", so.longopts + ["constr=", "dump-vcd=", "dump-vlogtb=", "dump-constr="])
opts, args = getopt.getopt(sys.argv[1:], so.shortopts + "t:u:S:igm:", so.longopts + ["smtc=", "dump-vcd=", "dump-vlogtb=", "dump-smtc="])
except:
usage()
@ -92,13 +92,13 @@ for o, a in opts:
assume_skipped = int(a)
elif o == "-S":
step_size = int(a)
elif o == "--constr":
elif o == "--smtc":
inconstr.append(a)
elif o == "--dump-vcd":
vcdfile = a
elif o == "--dump-vlogtb":
vlogtbfile = a
elif o == "--dump-constr":
elif o == "--dump-smtc":
outconstr = a
elif o == "-i":
tempind = True
@ -116,7 +116,7 @@ if len(args) != 1:
if tempind and len(inconstr) != 0:
print("Error: options -i and --constr are exclusive.");
print("Error: options -i and --smtc are exclusive.");
sys.exit(1)
@ -430,34 +430,6 @@ if tempind:
break
elif gentrace:
retstatus = True
for step in range(num_steps):
smt.write("(declare-fun s%d () %s_s)" % (step, topmod))
smt.write("(assert (%s_u s%d))" % (topmod, step))
smt.write("(assert (%s_a s%d))" % (topmod, step))
smt.write("(assert (%s_h s%d))" % (topmod, step))
smt.write("(assert %s)" % get_constr_expr(constr_asserts, step))
smt.write("(assert %s)" % get_constr_expr(constr_assumes, step))
if step == 0:
smt.write("(assert (%s_i s0))" % (topmod))
smt.write("(assert (%s_is s0))" % (topmod))
else:
smt.write("(assert (%s_t s%d s%d))" % (topmod, step-1, step))
smt.write("(assert (not (%s_is s%d)))" % (topmod, step))
print("%s Creating trace of length %d.." % (smt.timestamp(), num_steps))
if smt.check_sat() == "sat":
write_trace(num_steps)
else:
print("%s Creating trace failed!" % smt.timestamp())
retstatus = False
else: # not tempind, not gentrace
step = 0
retstatus = True
@ -495,30 +467,41 @@ else: # not tempind, not gentrace
smt.write("(assert %s)" % get_constr_expr(constr_assumes, step+i))
last_check_step = step+i
if last_check_step == step:
print("%s Checking asserts in step %d.." % (smt.timestamp(), step))
else:
print("%s Checking asserts in steps %d to %d.." % (smt.timestamp(), step, last_check_step))
smt.write("(push 1)")
if not gentrace:
if last_check_step == step:
print("%s Checking asserts in step %d.." % (smt.timestamp(), step))
else:
print("%s Checking asserts in steps %d to %d.." % (smt.timestamp(), step, last_check_step))
smt.write("(push 1)")
smt.write("(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)]))
smt.write("(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())
print_failed_asserts(topmod, "s%d" % step, topmod)
write_trace(step+step_size)
retstatus = False
break
if smt.check_sat() == "sat":
print("%s BMC failed!" % smt.timestamp())
print_failed_asserts(topmod, "s%d" % step, topmod)
write_trace(step+step_size)
retstatus = False
break
else: # unsat
smt.write("(pop 1)")
for i in range(step, last_check_step+1):
smt.write("(assert (%s_a s%d))" % (topmod, i))
smt.write("(assert %s)" % get_constr_expr(constr_asserts, i))
for i in range(step, last_check_step+1):
smt.write("(assert (%s_a s%d))" % (topmod, i))
smt.write("(assert %s)" % get_constr_expr(constr_asserts, i))
if gentrace:
print("%s Solving for step %d.." % (smt.timestamp(), step))
if smt.check_sat() != "sat":
print("%s No solution found!" % smt.timestamp())
retstatus = False
break
step += step_size
if gentrace:
write_trace(num_steps)
smt.write("(exit)")
smt.wait()