mirror of
https://github.com/YosysHQ/sby.git
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140 lines
4.7 KiB
Python
140 lines
4.7 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 Clifford Wolf <clifford@clifford.at>
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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 SbyTask
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def run(mode, job, engine_idx, engine):
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smtbmc_opts = []
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nomem_opt = False
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syn_opt = False
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opts, args = getopt.getopt(engine[1:], "s:", ["nomem", "syn"])
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assert len(args) == 0
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for o, a in opts:
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if o == "-s":
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smtbmc_opts += ["-s", a]
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elif o == "--nomem":
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nomem_opt = True
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elif o == "--syn":
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syn_opt = True
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else:
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assert False
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model_name = "smt2"
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if syn_opt: model_name += "_syn"
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if nomem_opt: model_name += "_nomem"
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if mode == "prove":
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run("prove_basecase", job, engine_idx, engine)
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run("prove_induction", job, engine_idx, engine)
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return
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taskname = "engine_%d" % engine_idx
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trace_prefix = "engine_%d/trace" % engine_idx
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logfile_prefix = "%s/engine_%d/logfile" % (job.workdir, engine_idx)
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if mode == "prove_basecase":
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taskname += ".basecase"
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logfile_prefix += "_basecase"
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if mode == "prove_induction":
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taskname += ".induction"
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trace_prefix += "_induct"
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logfile_prefix += "_induction"
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smtbmc_opts.append("-i")
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if mode == "cover":
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smtbmc_opts.append("-c")
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trace_prefix += "%"
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task = SbyTask(job, taskname, job.model(model_name),
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("cd %s; %s --noprogress %s -t %d --dump-vcd %s.vcd --dump-vlogtb %s_tb.v --dump-smtc %s.smtc model/design_smt2.smt2") %
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(job.workdir, job.exe_paths["smtbmc"], " ".join(smtbmc_opts), job.opt_depth, trace_prefix, trace_prefix, trace_prefix),
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logfile=open(logfile_prefix + ".txt", "w"))
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if mode == "prove_basecase":
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job.basecase_tasks.append(task)
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if mode == "prove_induction":
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job.induction_tasks.append(task)
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task_status = None
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def output_callback(line):
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nonlocal task_status
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match = re.match(r"^## [0-9: ]+ Status: FAILED", line)
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if match: task_status = "FAIL"
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match = re.match(r"^## [0-9: ]+ Status: PASSED", line)
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if match: task_status = "PASS"
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def exit_callback(retcode):
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assert task_status is not None
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if mode == "bmc" or mode == "cover":
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job.update_status(task_status)
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job.log("engine_%d: Status returned by engine: %s" % (engine_idx, task_status))
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job.summary.append("engine_%d (%s) returned %s" % (engine_idx, " ".join(engine), task_status))
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if task_status == "FAIL" and mode != "cover":
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job.summary.append("counterexample trace: %s/engine_%d/trace.vcd" % (job.workdir, engine_idx))
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job.terminate()
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elif mode in ["prove_basecase", "prove_induction"]:
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job.log("engine_%d: Status returned by engine for %s: %s" % (engine_idx, mode.split("_")[1], task_status))
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job.summary.append("engine_%d (%s) returned %s for %s" % (engine_idx, " ".join(engine), task_status, mode.split("_")[1]))
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if mode == "prove_basecase":
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for task in job.basecase_tasks:
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task.terminate()
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if task_status == "PASS":
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job.basecase_pass = True
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else:
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job.update_status(task_status)
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job.summary.append("counterexample trace: %s/engine_%d/trace.vcd" % (job.workdir, engine_idx))
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job.terminate()
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elif mode == "prove_induction":
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for task in job.induction_tasks:
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task.terminate()
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if task_status == "PASS":
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job.induction_pass = True
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else:
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assert False
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if job.basecase_pass and job.induction_pass:
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job.update_status("PASS")
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job.summary.append("successful proof by k-induction.")
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job.terminate()
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else:
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assert False
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task.output_callback = output_callback
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task.exit_callback = exit_callback
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