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Added "yosys-smtbmc --append"

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This commit is contained in:
Clifford Wolf 2016-11-22 21:21:13 +01:00
parent 3b73d3f140
commit f257ccf22e
1 changed files with 20 additions and 2 deletions
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22
backends/smt2/smtbmc.py
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@ -25,6 +25,7 @@ from collections import defaultdict
skip_steps = 0 skip_steps = 0
step_size = 1 step_size = 1
num_steps = 20 num_steps = 20
append_steps = 0
vcdfile = None vcdfile = None
cexfile = None cexfile = None
vlogtbfile = None vlogtbfile = None
@ -92,13 +93,18 @@ yosys-smtbmc [options] <yosys_smt2_output>
when using -g or -i, create a dump file for each when using -g or -i, create a dump file for each
step. The character '%' is replaces in all dump step. The character '%' is replaces in all dump
filenames with the step number. filenames with the step number.
--append <num_steps>
add <num_steps> time steps at the end of the trace
when creating a counter example (this additional time
steps will still be constrained by assumtions)
""" + so.helpmsg()) """ + so.helpmsg())
sys.exit(1) sys.exit(1)
try: try:
opts, args = getopt.getopt(sys.argv[1:], so.shortopts + "t:igm:", so.longopts + opts, args = getopt.getopt(sys.argv[1:], so.shortopts + "t:igm:", so.longopts +
["final-only", "assume-skipped=", "smtc=", "cex=", "dump-vcd=", "dump-vlogtb=", "dump-smtc=", "dump-all", "noinfo"]) ["final-only", "assume-skipped=", "smtc=", "cex=", "dump-vcd=", "dump-vlogtb=", "dump-smtc=", "dump-all", "noinfo", "append="])
except: except:
usage() usage()
@ -134,6 +140,8 @@ for o, a in opts:
dumpall = True dumpall = True
elif o == "--noinfo": elif o == "--noinfo":
noinfo = True noinfo = True
elif o == "--append":
append_steps = int(a)
elif o == "-i": elif o == "-i":
tempind = True tempind = True
elif o == "-g": elif o == "-g":
@ -668,10 +676,20 @@ else: # not tempind
if smt.check_sat() == "sat": if smt.check_sat() == "sat":
print("%s BMC failed!" % smt.timestamp()) print("%s BMC failed!" % smt.timestamp())
if append_steps > 0:
for i in range(last_check_step+1, last_check_step+1+append_steps):
print_msg("Appending additional step %d." % i)
smt.write("(declare-fun s%d () |%s_s|)" % (i, topmod))
smt.write("(assert (|%s_u| s%d))" % (topmod, i))
smt.write("(assert (|%s_h| s%d))" % (topmod, i))
smt.write("(assert (|%s_t| s%d s%d))" % (topmod, i-1, i))
smt.write("(assert %s)" % get_constr_expr(constr_assumes, i))
print_msg("Re-solving with appended steps..")
assert smt.check_sat() == "sat"
print_anyconsts(step) print_anyconsts(step)
for i in range(step, last_check_step+1): for i in range(step, last_check_step+1):
print_failed_asserts(i) print_failed_asserts(i)
write_trace(0, last_check_step+1, '%') write_trace(0, last_check_step+1+append_steps, '%')
retstatus = False retstatus = False
break break