mirror of
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136 lines
5.3 KiB
Python
136 lines
5.3 KiB
Python
#
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# SymbiYosys (sby) -- Front-end for Yosys-based formal verification flows
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#
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# Copyright (C) 2016 Claire Xenia Wolf <claire@yosyshq.com>
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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import re, os, getopt
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from sby_core import SbyProc
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def run(mode, task, engine_idx, engine):
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abc_opts, abc_command = getopt.getopt(engine[1:], "", [])
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if len(abc_command) == 0:
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task.error("Missing ABC command.")
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for o, a in abc_opts:
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task.error("Unexpected ABC engine options.")
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if abc_command[0] == "bmc3":
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if mode != "bmc":
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task.error("ABC command 'bmc3' is only valid in bmc mode.")
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abc_command[0] += f" -F {task.opt_depth} -v"
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elif abc_command[0] == "sim3":
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if mode != "bmc":
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task.error("ABC command 'sim3' is only valid in bmc mode.")
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abc_command[0] += f" -F {task.opt_depth} -v"
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elif abc_command[0] == "pdr":
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if mode != "prove":
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task.error("ABC command 'pdr' is only valid in prove mode.")
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abc_command[0] += f" -v"
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else:
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task.error(f"Invalid ABC command {abc_command[0]}.")
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proc = SbyProc(
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task,
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f"engine_{engine_idx}",
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task.model("aig"),
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f"""cd {task.workdir}; {task.exe_paths["abc"]} -c 'read_aiger model/design_aiger.aig; fold; strash; {" ".join(abc_command)}; write_cex -a engine_{engine_idx}/trace.aiw'""",
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logfile=open(f"{task.workdir}/engine_{engine_idx}/logfile.txt", "w")
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)
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proc.checkretcode = True
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proc.noprintregex = re.compile(r"^\.+$")
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proc_status = None
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def output_callback(line):
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nonlocal proc_status
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match = re.match(r"^Output [0-9]+ of miter .* was asserted in frame [0-9]+.", line)
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if match: proc_status = "FAIL"
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match = re.match(r"^Simulation of [0-9]+ frames for [0-9]+ rounds with [0-9]+ restarts did not assert POs.", line)
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if match: proc_status = "UNKNOWN"
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match = re.match(r"^Stopping BMC because all 2\^[0-9]+ reachable states are visited.", line)
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if match: proc_status = "PASS"
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match = re.match(r"^No output asserted in [0-9]+ frames.", line)
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if match: proc_status = "PASS"
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match = re.match(r"^Property proved.", line)
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if match: proc_status = "PASS"
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return line
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def exit_callback(retcode):
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if proc_status is None:
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task.error(f"engine_{engine_idx}: Could not determine engine status.")
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task.update_status(proc_status)
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task.log(f"engine_{engine_idx}: Status returned by engine: {proc_status}")
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task.summary.append(f"""engine_{engine_idx} ({" ".join(engine)}) returned {proc_status}""")
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task.terminate()
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if proc_status == "FAIL" and task.opt_aigsmt != "none":
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trace_prefix = f"engine_{engine_idx}/trace"
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dump_flags = f"--dump-vcd {trace_prefix}.vcd " if task.opt_vcd else ""
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dump_flags += f"--dump-yw {trace_prefix}.yw --dump-vlogtb {trace_prefix}_tb.v --dump-smtc {trace_prefix}.smtc"
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proc2 = SbyProc(
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task,
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f"engine_{engine_idx}",
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task.model("smt2"),
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("cd {}; {} -s {}{} --noprogress --append {} {dump_flags} --aig model/design_aiger.aim:engine_{i}/trace.aiw --aig-noheader model/design_smt2.smt2").format
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(task.workdir, task.exe_paths["smtbmc"], task.opt_aigsmt,
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"" if task.opt_tbtop is None else f" --vlogtb-top {task.opt_tbtop}",
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task.opt_append,
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dump_flags=dump_flags,
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i=engine_idx),
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logfile=open(f"{task.workdir}/engine_{engine_idx}/logfile2.txt", "w")
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)
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proc2_status = None
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def output_callback2(line):
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nonlocal proc2_status
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match = re.match(r"^## [0-9: ]+ Status: FAILED", line)
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if match: proc2_status = "FAIL"
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match = re.match(r"^## [0-9: ]+ Status: PASSED", line)
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if match: proc2_status = "PASS"
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return line
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def exit_callback2(retcode):
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if proc2_status is None:
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task.error(f"engine_{engine_idx}: Could not determine aigsmt status.")
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if proc2_status != "FAIL":
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task.error(f"engine_{engine_idx}: Unexpected aigsmt status.")
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if os.path.exists(f"{task.workdir}/engine_{engine_idx}/trace.vcd"):
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task.summary.append(f"counterexample trace: {task.workdir}/engine_{engine_idx}/trace.vcd")
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proc2.output_callback = output_callback2
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proc2.exit_callback = exit_callback2
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proc.output_callback = output_callback
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proc.exit_callback = exit_callback
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