mirror of
https://github.com/YosysHQ/yosys
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2157 lines
73 KiB
Python
2157 lines
73 KiB
Python
#!/usr/bin/env python3
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#
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# yosys -- Yosys Open SYnthesis Suite
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#
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# Copyright (C) 2012 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 os, sys, getopt, re, bisect, json
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##yosys-sys-path##
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from smtio import SmtIo, SmtOpts, MkVcd
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from ywio import ReadWitness, WriteWitness, WitnessValues
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from collections import defaultdict
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got_topt = False
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skip_steps = 0
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step_size = 1
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num_steps = 20
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append_steps = 0
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vcdfile = None
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inywfile = None
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outywfile = None
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cexfile = None
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aimfile = None
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aiwfile = None
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aigheader = True
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btorwitfile = None
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vlogtbfile = None
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vlogtbtop = None
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inconstr = list()
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outconstr = None
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gentrace = False
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covermode = False
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tempind = False
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dumpall = False
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assume_skipped = None
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final_only = False
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topmod = None
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noinfo = False
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presat = False
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smtcinit = False
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smtctop = None
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noinit = False
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binarymode = False
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keep_going = False
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check_witness = False
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detect_loops = False
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incremental = None
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track_assumes = False
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minimize_assumes = False
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so = SmtOpts()
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def help():
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print(os.path.basename(sys.argv[0]) + """ [options] <yosys_smt2_output>
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-h, --help
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show this message
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-t <num_steps>
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-t <skip_steps>:<num_steps>
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-t <skip_steps>:<step_size>:<num_steps>
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default: skip_steps=0, step_size=1, num_steps=20
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-g
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generate an arbitrary trace that satisfies
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all assertions and assumptions.
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-i
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instead of BMC run temporal induction
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-c
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instead of regular BMC run cover analysis
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-m <module_name>
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name of the top module
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--smtc <constr_filename>
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read constraints file
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--cex <cex_filename>
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read cex file as written by ABC's "write_cex -n"
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--aig <prefix>
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read AIGER map file (as written by Yosys' "write_aiger -map")
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and AIGER witness file. The file names are <prefix>.aim for
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the map file and <prefix>.aiw for the witness file.
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--aig <aim_filename>:<aiw_filename>
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like above, but for map files and witness files that do not
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share a filename prefix (or use different file extensions).
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--aig-noheader
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the AIGER witness file does not include the status and
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properties lines.
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--yw <yosys_witness_filename>
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read a Yosys witness.
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--btorwit <btor_witness_filename>
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read a BTOR witness.
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--noinfo
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only run the core proof, do not collect and print any
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additional information (e.g. which assert failed)
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--presat
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check if the design with assumptions but without assertions
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is SAT before checking if assertions are UNSAT. This will
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detect if there are contradicting assumptions. In some cases
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this will also help to "warm up" the solver, potentially
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yielding a speedup.
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--final-only
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only check final constraints, assume base case
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--assume-skipped <start_step>
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assume asserts in skipped steps in BMC.
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no assumptions are created for skipped steps
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before <start_step>.
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--dump-vcd <vcd_filename>
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write trace to this VCD file
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(hint: use 'write_smt2 -wires' for maximum
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coverage of signals in generated VCD file)
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--dump-yw <yw_filename>
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write trace as a Yosys witness trace
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--dump-vlogtb <verilog_filename>
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write trace as Verilog test bench
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--vlogtb-top <hierarchical_name>
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use the given entity as top module for the generated
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Verilog test bench. The <hierarchical_name> is relative
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to the design top module without the top module name.
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--dump-smtc <constr_filename>
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write trace as constraints file
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--smtc-init
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write just the last state as initial constraint to smtc file
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--smtc-top <old>[:<new>]
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replace <old> with <new> in constraints dumped to smtc
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file and only dump object below <old> in design hierarchy.
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--noinit
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do not assume initial conditions in state 0
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--dump-all
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when using -g or -i, create a dump file for each
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step. The character '%' is replaced in all dump
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filenames with the step number.
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--append <num_steps>
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add <num_steps> time steps at the end of the trace
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when creating a counter example (this additional time
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steps will still be constrained by assumptions)
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--binary
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dump anyconst values as raw bit strings
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--keep-going
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continue BMC after the first failed assertion and report
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further failed assertions. To output multiple traces
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covering all found failed assertions, the character '%' is
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replaced in all dump filenames with an increasing number.
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In cover mode, don't stop when a cover trace contains a failed
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assertion.
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--check-witness
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check that the used witness file contains sufficient
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constraints to force an assertion failure.
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--detect-loops
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check if states are unique in temporal induction counter examples
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(this feature is experimental and incomplete)
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--incremental
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run in incremental mode (experimental)
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--track-assumes
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track individual assumptions and report a subset of used
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assumptions that are sufficient for the reported outcome. This
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can be used to debug PREUNSAT failures as well as to find a
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smaller set of sufficient assumptions.
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--minimize-assumes
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when using --track-assumes, solve for a minimal set of sufficient assumptions.
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""" + so.helpmsg())
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def usage():
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help()
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sys.exit(1)
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try:
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opts, args = getopt.getopt(sys.argv[1:], so.shortopts + "t:higcm:", so.longopts +
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["help", "final-only", "assume-skipped=", "smtc=", "cex=", "aig=", "aig-noheader", "yw=", "btorwit=", "presat",
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"dump-vcd=", "dump-yw=", "dump-vlogtb=", "vlogtb-top=", "dump-smtc=", "dump-all", "noinfo", "append=",
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"smtc-init", "smtc-top=", "noinit", "binary", "keep-going", "check-witness", "detect-loops", "incremental",
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"track-assumes", "minimize-assumes"])
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except:
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usage()
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for o, a in opts:
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if o in ("-h", "--help"):
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help()
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sys.exit(0)
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elif o == "-t":
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got_topt = True
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a = a.split(":")
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if len(a) == 1:
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num_steps = int(a[0])
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elif len(a) == 2:
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skip_steps = int(a[0])
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num_steps = int(a[1])
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elif len(a) == 3:
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skip_steps = int(a[0])
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step_size = int(a[1])
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num_steps = int(a[2])
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else:
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assert False
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elif o == "--assume-skipped":
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assume_skipped = int(a)
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elif o == "--final-only":
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final_only = True
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elif o == "--smtc":
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inconstr.append(a)
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elif o == "--cex":
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cexfile = a
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elif o == "--aig":
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if ":" in a:
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aimfile, aiwfile = a.split(":")
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else:
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aimfile = a + ".aim"
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aiwfile = a + ".aiw"
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elif o == "--aig-noheader":
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aigheader = False
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elif o == "--yw":
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inywfile = a
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elif o == "--btorwit":
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btorwitfile = a
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elif o == "--dump-vcd":
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vcdfile = a
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elif o == "--dump-yw":
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outywfile = a
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elif o == "--dump-vlogtb":
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vlogtbfile = a
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elif o == "--vlogtb-top":
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vlogtbtop = a
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elif o == "--dump-smtc":
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outconstr = a
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elif o == "--smtc-init":
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smtcinit = True
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elif o == "--smtc-top":
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smtctop = a.split(":")
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if len(smtctop) == 1:
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smtctop.append("")
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assert len(smtctop) == 2
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smtctop = tuple(smtctop)
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elif o == "--dump-all":
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dumpall = True
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elif o == "--presat":
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presat = True
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elif o == "--noinfo":
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noinfo = True
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elif o == "--noinit":
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noinit = True
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elif o == "--append":
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append_steps = int(a)
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elif o == "-i":
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tempind = True
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elif o == "-g":
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gentrace = True
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elif o == "-c":
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covermode = True
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elif o == "-m":
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topmod = a
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elif o == "--binary":
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binarymode = True
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elif o == "--keep-going":
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keep_going = True
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elif o == "--check-witness":
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check_witness = True
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elif o == "--detect-loops":
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detect_loops = True
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elif o == "--incremental":
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from smtbmc_incremental import Incremental
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incremental = Incremental()
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elif o == "--track-assumes":
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track_assumes = True
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elif o == "--minimize-assumes":
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minimize_assumes = True
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elif so.handle(o, a):
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pass
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else:
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usage()
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if len(args) != 1:
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usage()
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if sum([tempind, gentrace, covermode, incremental is not None]) > 1:
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usage()
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constr_final_start = None
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constr_asserts = defaultdict(list)
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constr_assumes = defaultdict(list)
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constr_write = list()
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for fn in inconstr:
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current_states = None
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current_line = 0
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with open(fn, "r") as f:
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for line in f:
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current_line += 1
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if line.startswith("#"):
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continue
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tokens = line.split()
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if len(tokens) == 0:
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continue
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if tokens[0] == "initial":
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current_states = set()
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if not tempind:
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current_states.add(0)
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continue
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if tokens[0] == "final":
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constr_final = True
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if len(tokens) == 1:
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current_states = set(["final-%d" % i for i in range(0, num_steps+1)])
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constr_final_start = 0
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elif len(tokens) == 2:
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arg = abs(int(tokens[1]))
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current_states = set(["final-%d" % i for i in range(arg, num_steps+1)])
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constr_final_start = arg if constr_final_start is None else min(constr_final_start, arg)
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else:
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assert False
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continue
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if tokens[0] == "state":
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current_states = set()
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if not tempind:
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for token in tokens[1:]:
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tok = token.split(":")
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if len(tok) == 1:
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current_states.add(int(token))
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elif len(tok) == 2:
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lower = int(tok[0])
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if tok[1] == "*":
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upper = num_steps
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else:
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upper = int(tok[1])
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for i in range(lower, upper+1):
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current_states.add(i)
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else:
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assert False
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continue
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if tokens[0] == "always":
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if len(tokens) == 1:
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current_states = set(range(0, num_steps+1))
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elif len(tokens) == 2:
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arg = abs(int(tokens[1]))
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current_states = set(range(arg, num_steps+1))
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else:
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assert False
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continue
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if tokens[0] == "assert":
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assert current_states is not None
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for state in current_states:
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constr_asserts[state].append(("%s:%d" % (fn, current_line), " ".join(tokens[1:])))
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continue
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if tokens[0] == "assume":
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assert current_states is not None
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for state in current_states:
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constr_assumes[state].append(("%s:%d" % (fn, current_line), " ".join(tokens[1:])))
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continue
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if tokens[0] == "write":
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constr_write.append(" ".join(tokens[1:]))
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continue
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if tokens[0] == "logic":
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so.logic = " ".join(tokens[1:])
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continue
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assert False
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def get_constr_expr(db, state, final=False, getvalues=False, individual=False):
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if final:
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if ("final-%d" % state) not in db:
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return ([], [], []) if getvalues or individual else "true"
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else:
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if state not in db:
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return ([], [], []) if getvalues or individual else "true"
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netref_regex = re.compile(r'(^|[( ])\[(-?[0-9]+:|)([^\]]*|\S*)\](?=[ )]|$)')
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def replace_netref(match):
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state_sel = match.group(2)
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if state_sel == "":
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st = state
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elif state_sel[0] == "-":
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st = state + int(state_sel[:-1])
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else:
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st = int(state_sel[:-1])
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expr = smt.net_expr(topmod, "s%d" % st, smt.get_path(topmod, match.group(3)))
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return match.group(1) + expr
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expr_list = list()
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for loc, expr in db[("final-%d" % state) if final else state]:
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actual_expr = netref_regex.sub(replace_netref, expr)
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if getvalues or individual:
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expr_list.append((loc, expr, actual_expr))
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else:
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expr_list.append(actual_expr)
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if getvalues or individual:
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loc_list, expr_list, actual_expr_list = zip(*expr_list)
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if individual:
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return loc_list, expr_list, actual_expr_list
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else:
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value_list = smt.get_list(actual_expr_list)
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return loc_list, expr_list, value_list
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if len(expr_list) == 0:
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return "true"
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if len(expr_list) == 1:
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return expr_list[0]
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return "(and %s)" % " ".join(expr_list)
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smt = SmtIo(opts=so)
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if track_assumes:
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smt.smt2_options[':produce-unsat-assumptions'] = 'true'
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if noinfo and vcdfile is None and vlogtbfile is None and outconstr is None:
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smt.produce_models = False
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def print_msg(msg):
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if incremental:
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incremental.print_msg(msg)
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else:
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print("%s %s" % (smt.timestamp(), msg), flush=True)
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print_msg("Solver: %s" % (so.solver))
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with open(args[0], "r") as f:
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for line in f:
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smt.write(line)
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for line in constr_write:
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smt.write(line)
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if topmod is None:
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topmod = smt.topmod
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assert topmod is not None
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assert topmod in smt.modinfo
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if cexfile is not None:
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if not got_topt:
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skip_steps = 0
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num_steps = 0
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with open(cexfile, "r") as f:
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cex_regex = re.compile(r'([^\[@=]+)(\[\d+\])?([^@=]*)(@\d+)=([01])')
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for entry in f.read().split():
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match = cex_regex.match(entry)
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assert match
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name, bit, extra_name, step, val = match.group(1), match.group(2), match.group(3), match.group(4), match.group(5)
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if extra_name != "":
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continue
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if name not in smt.modinfo[topmod].inputs:
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continue
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if bit is None:
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bit = 0
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else:
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bit = int(bit[1:-1])
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step = int(step[1:])
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val = int(val)
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if smt.modinfo[topmod].wsize[name] == 1:
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assert bit == 0
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smtexpr = "(= [%s] %s)" % (name, "true" if val else "false")
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else:
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smtexpr = "(= ((_ extract %d %d) [%s]) #b%d)" % (bit, bit, name, val)
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# print("cex@%d: %s" % (step, smtexpr))
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constr_assumes[step].append((cexfile, smtexpr))
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if not got_topt:
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if not check_witness:
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skip_steps = max(skip_steps, step)
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num_steps = max(num_steps, step+1)
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|
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if aimfile is not None:
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input_map = dict()
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init_map = dict()
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latch_map = dict()
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|
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if not got_topt:
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skip_steps = 0
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num_steps = 0
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|
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with open(aimfile, "r") as f:
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for entry in f.read().splitlines():
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entry = entry.split()
|
|
|
|
if entry[0] == "input":
|
|
input_map[int(entry[1])] = (entry[3], int(entry[2]))
|
|
continue
|
|
|
|
if entry[0] == "init":
|
|
init_map[int(entry[1])] = (entry[3], int(entry[2]))
|
|
continue
|
|
|
|
if entry[0] in ["latch", "invlatch"]:
|
|
latch_map[int(entry[1])] = (entry[3], int(entry[2]), entry[0] == "invlatch")
|
|
continue
|
|
|
|
if entry[0] in ["output", "wire"]:
|
|
continue
|
|
|
|
assert False
|
|
|
|
with open(aiwfile, "r") as f:
|
|
got_state = False
|
|
got_ffinit = False
|
|
step = 0
|
|
|
|
if not aigheader:
|
|
got_state = True
|
|
|
|
for entry in f.read().splitlines():
|
|
if len(entry) == 0 or entry[0] in "bcjfu.#":
|
|
continue
|
|
|
|
if not got_state:
|
|
got_state = True
|
|
assert entry == "1"
|
|
continue
|
|
|
|
if not got_ffinit:
|
|
got_ffinit = True
|
|
if len(init_map) == 0:
|
|
for i in range(len(entry)):
|
|
if entry[i] == "x":
|
|
continue
|
|
|
|
if i in latch_map:
|
|
value = int(entry[i])
|
|
name = latch_map[i][0]
|
|
bitidx = latch_map[i][1]
|
|
invert = latch_map[i][2]
|
|
|
|
if invert:
|
|
value = 1 - value
|
|
|
|
path = smt.get_path(topmod, name)
|
|
width = smt.net_width(topmod, path)
|
|
|
|
if width == 1:
|
|
assert bitidx == 0
|
|
smtexpr = "(= [%s] %s)" % (name, "true" if value else "false")
|
|
else:
|
|
smtexpr = "(= ((_ extract %d %d) [%s]) #b%d)" % (bitidx, bitidx, name, value)
|
|
|
|
constr_assumes[0].append((cexfile, smtexpr))
|
|
continue
|
|
|
|
for i in range(len(entry)):
|
|
if entry[i] == "x":
|
|
continue
|
|
|
|
if (step == 0) and (i in init_map):
|
|
value = int(entry[i])
|
|
name = init_map[i][0]
|
|
bitidx = init_map[i][1]
|
|
|
|
path = smt.get_path(topmod, name)
|
|
|
|
if not smt.net_exists(topmod, path):
|
|
match = re.match(r"(.*)\[(\d+)\]$", path[-1])
|
|
if match:
|
|
path[-1] = match.group(1)
|
|
addr = int(match.group(2))
|
|
|
|
if not match or not smt.mem_exists(topmod, path):
|
|
print_msg("Ignoring init value for unknown net: %s" % (name))
|
|
continue
|
|
|
|
meminfo = smt.mem_info(topmod, path)
|
|
smtexpr = "(select [%s] #b%s)" % (".".join(path), bin(addr)[2:].zfill(meminfo[0]))
|
|
width = meminfo[1]
|
|
|
|
else:
|
|
smtexpr = "[%s]" % name
|
|
width = smt.net_width(topmod, path)
|
|
|
|
if width == 1:
|
|
assert bitidx == 0
|
|
smtexpr = "(= %s %s)" % (smtexpr, "true" if value else "false")
|
|
else:
|
|
smtexpr = "(= ((_ extract %d %d) %s) #b%d)" % (bitidx, bitidx, smtexpr, value)
|
|
|
|
constr_assumes[0].append((cexfile, smtexpr))
|
|
|
|
if i in input_map:
|
|
value = int(entry[i])
|
|
name = input_map[i][0]
|
|
bitidx = input_map[i][1]
|
|
|
|
path = smt.get_path(topmod, name)
|
|
width = smt.net_width(topmod, path)
|
|
|
|
if width == 1:
|
|
assert bitidx == 0
|
|
smtexpr = "(= [%s] %s)" % (name, "true" if value else "false")
|
|
else:
|
|
smtexpr = "(= ((_ extract %d %d) [%s]) #b%d)" % (bitidx, bitidx, name, value)
|
|
|
|
constr_assumes[step].append((cexfile, smtexpr))
|
|
|
|
if not got_topt:
|
|
if not check_witness:
|
|
skip_steps = max(skip_steps, step)
|
|
# some solvers optimize the properties so that they fail one cycle early,
|
|
# thus we check the properties in the cycle the aiger witness ends, and
|
|
# if that doesn't work, we check the cycle after that as well.
|
|
num_steps = max(num_steps, step+2)
|
|
step += 1
|
|
|
|
ywfile_hierwitness_cache = None
|
|
|
|
def ywfile_hierwitness():
|
|
global ywfile_hierwitness_cache
|
|
if ywfile_hierwitness_cache is None:
|
|
ywfile_hierwitness = smt.hierwitness(topmod, allregs=True, blackbox=True)
|
|
|
|
inits, seqs, clocks, mems = ywfile_hierwitness
|
|
|
|
smt_wires = defaultdict(list)
|
|
smt_mems = defaultdict(list)
|
|
|
|
for wire in inits + seqs:
|
|
smt_wires[wire["path"]].append(wire)
|
|
|
|
for mem in mems:
|
|
smt_mems[mem["path"]].append(mem)
|
|
|
|
ywfile_hierwitness_cache = inits, seqs, clocks, mems, smt_wires, smt_mems
|
|
|
|
return ywfile_hierwitness_cache
|
|
|
|
def_bits_re = re.compile(r'([01]+)')
|
|
|
|
def smt_extract_mask(smt_expr, mask):
|
|
chunks = []
|
|
def_bits = ''
|
|
|
|
mask_index_order = mask[::-1]
|
|
|
|
for matched in def_bits_re.finditer(mask_index_order):
|
|
chunks.append(matched.span())
|
|
def_bits += matched[0]
|
|
|
|
if not chunks:
|
|
return
|
|
|
|
if len(chunks) == 1:
|
|
start, end = chunks[0]
|
|
if start == 0 and end == len(mask_index_order):
|
|
combined_chunks = smt_expr
|
|
else:
|
|
combined_chunks = '((_ extract %d %d) %s)' % (end - 1, start, smt_expr)
|
|
else:
|
|
combined_chunks = '(let ((x %s)) (concat %s))' % (smt_expr, ' '.join(
|
|
'((_ extract %d %d) x)' % (end - 1, start)
|
|
for start, end in reversed(chunks)
|
|
))
|
|
|
|
return combined_chunks, ''.join(mask_index_order[start:end] for start, end in chunks)[::-1]
|
|
|
|
def smt_concat(exprs):
|
|
if not isinstance(exprs, (tuple, list)):
|
|
exprs = tuple(exprs)
|
|
if not exprs:
|
|
return ""
|
|
if len(exprs) == 1:
|
|
return exprs[1]
|
|
return "(concat %s)" % ' '.join(exprs)
|
|
|
|
def ywfile_signal(sig, step, mask=None):
|
|
assert sig.width > 0
|
|
|
|
inits, seqs, clocks, mems, smt_wires, smt_mems = ywfile_hierwitness()
|
|
sig_end = sig.offset + sig.width
|
|
|
|
output = []
|
|
|
|
if sig.path in smt_wires:
|
|
for wire in smt_wires[sig.path]:
|
|
width, offset = wire["width"], wire["offset"]
|
|
|
|
smt_bool = smt.net_width(topmod, wire["smtpath"]) == 1
|
|
|
|
offset = max(offset, 0)
|
|
|
|
end = width + offset
|
|
common_offset = max(sig.offset, offset)
|
|
common_end = min(sig_end, end)
|
|
if common_end <= common_offset:
|
|
continue
|
|
|
|
smt_expr = smt.witness_net_expr(topmod, f"s{step}", wire)
|
|
|
|
if not smt_bool:
|
|
slice_high = common_end - offset - 1
|
|
slice_low = common_offset - offset
|
|
smt_expr = "((_ extract %d %d) %s)" % (slice_high, slice_low, smt_expr)
|
|
else:
|
|
smt_expr = "(ite %s #b1 #b0)" % smt_expr
|
|
|
|
output.append(((common_offset - sig.offset), (common_end - sig.offset), smt_expr))
|
|
|
|
if sig.memory_path:
|
|
if sig.memory_path in smt_mems:
|
|
for mem in smt_mems[sig.memory_path]:
|
|
width, size, bv = mem["width"], mem["size"], mem["statebv"]
|
|
|
|
smt_expr = smt.net_expr(topmod, f"s{step}", mem["smtpath"])
|
|
|
|
if bv:
|
|
word_low = sig.memory_addr * width
|
|
word_high = word_low + width - 1
|
|
smt_expr = "((_ extract %d %d) %s)" % (word_high, word_low, smt_expr)
|
|
else:
|
|
addr_width = (size - 1).bit_length()
|
|
addr_bits = f"{sig.memory_addr:0{addr_width}b}"
|
|
smt_expr = "(select %s #b%s )" % (smt_expr, addr_bits)
|
|
|
|
if sig.width < width:
|
|
slice_high = sig.offset + sig.width - 1
|
|
smt_expr = "((_ extract %d %d) %s)" % (slice_high, sig.offset, smt_expr)
|
|
|
|
output.append((0, sig.width, smt_expr))
|
|
|
|
output.sort()
|
|
|
|
output = [chunk for chunk in output if chunk[0] != chunk[1]]
|
|
|
|
pos = 0
|
|
|
|
for start, end, smt_expr in output:
|
|
assert start == pos
|
|
pos = end
|
|
|
|
assert pos == sig.width
|
|
|
|
if len(output) == 1:
|
|
return output[0][-1]
|
|
return smt_concat(smt_expr for start, end, smt_expr in reversed(output))
|
|
|
|
def ywfile_constraints(inywfile, constr_assumes, map_steps=None, skip_x=False):
|
|
global ywfile_hierwitness_cache
|
|
if map_steps is None:
|
|
map_steps = {}
|
|
|
|
with open(inywfile, "r") as f:
|
|
inyw = ReadWitness(f)
|
|
|
|
inits, seqs, clocks, mems, smt_wires, smt_mems = ywfile_hierwitness()
|
|
|
|
bits_re = re.compile(r'[01?]*$')
|
|
max_t = -1
|
|
|
|
for t, step in inyw.steps():
|
|
present_signals, missing = step.present_signals(inyw.sigmap)
|
|
for sig in present_signals:
|
|
bits = step[sig]
|
|
if skip_x:
|
|
bits = bits.replace('x', '?')
|
|
if not bits_re.match(bits):
|
|
raise ValueError("unsupported bit value in Yosys witness file")
|
|
|
|
if bits.count('?') == len(bits):
|
|
continue
|
|
|
|
smt_expr = ywfile_signal(sig, map_steps.get(t, t))
|
|
|
|
smt_expr, bits = smt_extract_mask(smt_expr, bits)
|
|
|
|
smt_constr = "(= %s #b%s)" % (smt_expr, bits)
|
|
constr_assumes[t].append((inywfile, smt_constr))
|
|
|
|
max_t = t
|
|
return max_t
|
|
|
|
if inywfile is not None:
|
|
if not got_topt:
|
|
skip_steps = 0
|
|
num_steps = 0
|
|
|
|
max_t = ywfile_constraints(inywfile, constr_assumes)
|
|
|
|
if not got_topt:
|
|
if not check_witness:
|
|
skip_steps = max(skip_steps, max_t)
|
|
num_steps = max(num_steps, max_t+1)
|
|
|
|
if btorwitfile is not None:
|
|
with open(btorwitfile, "r") as f:
|
|
step = None
|
|
suffix = None
|
|
altsuffix = None
|
|
header_okay = False
|
|
|
|
for line in f:
|
|
line = line.strip()
|
|
|
|
if line == "sat":
|
|
header_okay = True
|
|
continue
|
|
|
|
if not header_okay:
|
|
continue
|
|
|
|
if line == "" or line[0] == "b" or line[0] == "j":
|
|
continue
|
|
|
|
if line == ".":
|
|
break
|
|
|
|
if line[0] == '#' or line[0] == '@':
|
|
step = int(line[1:])
|
|
suffix = line
|
|
altsuffix = suffix
|
|
if suffix[0] == "@":
|
|
altsuffix = "#" + suffix[1:]
|
|
else:
|
|
altsuffix = "@" + suffix[1:]
|
|
continue
|
|
|
|
line = line.split()
|
|
|
|
if len(line) == 0:
|
|
continue
|
|
|
|
if line[-1].endswith(suffix):
|
|
line[-1] = line[-1][0:len(line[-1]) - len(suffix)]
|
|
|
|
if line[-1].endswith(altsuffix):
|
|
line[-1] = line[-1][0:len(line[-1]) - len(altsuffix)]
|
|
|
|
if line[-1][0] == "$":
|
|
continue
|
|
|
|
# BV assignments
|
|
if len(line) == 3 and line[1][0] != "[":
|
|
value = line[1]
|
|
name = line[2]
|
|
|
|
path = smt.get_path(topmod, name)
|
|
|
|
if not smt.net_exists(topmod, path):
|
|
continue
|
|
|
|
width = smt.net_width(topmod, path)
|
|
|
|
if width == 1:
|
|
assert value in ["0", "1"]
|
|
value = "true" if value == "1" else "false"
|
|
else:
|
|
value = "#b" + value
|
|
|
|
smtexpr = "(= [%s] %s)" % (name, value)
|
|
constr_assumes[step].append((btorwitfile, smtexpr))
|
|
|
|
# Array assignments
|
|
if len(line) == 4 and line[1][0] == "[":
|
|
index = line[1]
|
|
value = line[2]
|
|
name = line[3]
|
|
|
|
path = smt.get_path(topmod, name)
|
|
|
|
if not smt.mem_exists(topmod, path):
|
|
continue
|
|
|
|
meminfo = smt.mem_info(topmod, path)
|
|
|
|
if meminfo[1] == 1:
|
|
assert value in ["0", "1"]
|
|
value = "true" if value == "1" else "false"
|
|
else:
|
|
value = "#b" + value
|
|
|
|
assert index[0] == "["
|
|
assert index[-1] == "]"
|
|
index = "#b" + index[1:-1]
|
|
|
|
smtexpr = "(= (select [%s] %s) %s)" % (name, index, value)
|
|
constr_assumes[step].append((btorwitfile, smtexpr))
|
|
|
|
skip_steps = step
|
|
num_steps = step+1
|
|
|
|
def collect_mem_trace_data(steps, vcd=None):
|
|
mem_trace_data = dict()
|
|
|
|
for mempath in sorted(smt.hiermems(topmod)):
|
|
abits, width, rports, wports, asyncwr = smt.mem_info(topmod, mempath)
|
|
|
|
expr_id = list()
|
|
expr_list = list()
|
|
for seq, i in enumerate(steps):
|
|
for j in range(rports):
|
|
expr_id.append(('R', seq, j, 'A'))
|
|
expr_id.append(('R', seq, j, 'D'))
|
|
expr_list.append(smt.mem_expr(topmod, "s%d" % i, mempath, "R%dA" % j))
|
|
expr_list.append(smt.mem_expr(topmod, "s%d" % i, mempath, "R%dD" % j))
|
|
for j in range(wports):
|
|
expr_id.append(('W', seq, j, 'A'))
|
|
expr_id.append(('W', seq, j, 'D'))
|
|
expr_id.append(('W', seq, j, 'M'))
|
|
expr_list.append(smt.mem_expr(topmod, "s%d" % i, mempath, "W%dA" % j))
|
|
expr_list.append(smt.mem_expr(topmod, "s%d" % i, mempath, "W%dD" % j))
|
|
expr_list.append(smt.mem_expr(topmod, "s%d" % i, mempath, "W%dM" % j))
|
|
|
|
rdata = list()
|
|
wdata = list()
|
|
addrs = set()
|
|
|
|
for eid, edat in zip(expr_id, smt.get_list(expr_list)):
|
|
t, i, j, f = eid
|
|
|
|
if t == 'R':
|
|
c = rdata
|
|
elif t == 'W':
|
|
c = wdata
|
|
else:
|
|
assert False
|
|
|
|
while len(c) <= i:
|
|
c.append(list())
|
|
c = c[i]
|
|
|
|
while len(c) <= j:
|
|
c.append(dict())
|
|
c = c[j]
|
|
|
|
c[f] = smt.bv2bin(edat)
|
|
|
|
if f == 'A':
|
|
addrs.add(c[f])
|
|
|
|
for addr in addrs:
|
|
tdata = list()
|
|
data = ["x"] * width
|
|
gotread = False
|
|
|
|
if len(wdata) == 0 and len(rdata) != 0:
|
|
wdata = [[]] * len(rdata)
|
|
|
|
assert len(rdata) == len(wdata)
|
|
|
|
for i in range(len(wdata)):
|
|
if not gotread:
|
|
for j_data in rdata[i]:
|
|
if j_data["A"] == addr:
|
|
data = list(j_data["D"])
|
|
gotread = True
|
|
break
|
|
|
|
if gotread:
|
|
buf = data[:]
|
|
for ii in reversed(range(len(tdata))):
|
|
for k in range(width):
|
|
if tdata[ii][k] == "x":
|
|
tdata[ii][k] = buf[k]
|
|
else:
|
|
buf[k] = tdata[ii][k]
|
|
|
|
if not asyncwr:
|
|
tdata.append(data[:])
|
|
|
|
for j_data in wdata[i]:
|
|
if j_data["A"] != addr:
|
|
continue
|
|
|
|
D = j_data["D"]
|
|
M = j_data["M"]
|
|
|
|
for k in range(width):
|
|
if M[k] == "1":
|
|
data[k] = D[k]
|
|
|
|
if asyncwr:
|
|
tdata.append(data[:])
|
|
|
|
assert len(tdata) == len(rdata)
|
|
|
|
int_addr = int(addr, 2)
|
|
|
|
netpath = mempath[:]
|
|
if vcd:
|
|
netpath[-1] += "<%0*x>" % ((len(addr)+3) // 4, int_addr)
|
|
vcd.add_net([topmod] + netpath, width)
|
|
|
|
for seq, i in enumerate(steps):
|
|
if i not in mem_trace_data:
|
|
mem_trace_data[i] = list()
|
|
mem_trace_data[i].append((netpath, int_addr, "".join(tdata[seq])))
|
|
|
|
return mem_trace_data
|
|
|
|
def write_vcd_trace(steps, index, seq_time=False):
|
|
filename = vcdfile.replace("%", index)
|
|
print_msg("Writing trace to VCD file: %s" % (filename))
|
|
|
|
with open(filename, "w") as vcd_file:
|
|
vcd = MkVcd(vcd_file)
|
|
path_list = list()
|
|
|
|
for netpath in sorted(smt.hiernets(topmod)):
|
|
hidden_net = False
|
|
for n in netpath:
|
|
if n.startswith("$"):
|
|
hidden_net = True
|
|
if not hidden_net:
|
|
edge = smt.net_clock(topmod, netpath)
|
|
if edge is None:
|
|
vcd.add_net([topmod] + netpath, smt.net_width(topmod, netpath))
|
|
else:
|
|
vcd.add_clock([topmod] + netpath, edge)
|
|
path_list.append(netpath)
|
|
|
|
mem_trace_data = collect_mem_trace_data(steps, vcd)
|
|
|
|
for seq, i in enumerate(steps):
|
|
vcd.set_time(seq if seq_time else i)
|
|
value_list = smt.get_net_bin_list(topmod, path_list, "s%d" % i)
|
|
for path, value in zip(path_list, value_list):
|
|
vcd.set_net([topmod] + path, value)
|
|
if i in mem_trace_data:
|
|
for path, addr, value in mem_trace_data[i]:
|
|
vcd.set_net([topmod] + path, value)
|
|
|
|
if seq_time:
|
|
end_time = len(steps)
|
|
elif steps:
|
|
end_time = steps[-1] + 1
|
|
else:
|
|
end_time = 0
|
|
|
|
vcd.set_time(end_time)
|
|
|
|
def detect_state_loop(steps_start, steps_stop):
|
|
print_msg(f"Checking for loops in found induction counter example")
|
|
print_msg(f"This feature is experimental and incomplete")
|
|
|
|
path_list = sorted(smt.hiernets(topmod, regs_only=True))
|
|
|
|
mem_trace_data = collect_mem_trace_data(steps_start, steps_stop)
|
|
|
|
# Map state to index of step when it occurred
|
|
states = dict()
|
|
|
|
for i in range(steps_start, steps_stop):
|
|
value_list = smt.get_net_bin_list(topmod, path_list, "s%d" % i)
|
|
mem_state = sorted(
|
|
[(tuple(path), addr, data)
|
|
for path, addr, data in mem_trace_data.get(i, [])])
|
|
state = tuple(value_list), tuple(mem_state)
|
|
if state in states:
|
|
return (i, states[state])
|
|
else:
|
|
states[state] = i
|
|
|
|
return None
|
|
|
|
def char_ok_in_verilog(c,i):
|
|
if ('A' <= c <= 'Z'): return True
|
|
if ('a' <= c <= 'z'): return True
|
|
if ('0' <= c <= '9' and i>0): return True
|
|
if (c == '_'): return True
|
|
if (c == '$'): return True
|
|
return False
|
|
|
|
def escape_identifier(identifier):
|
|
if type(identifier) is list:
|
|
return map(escape_identifier, identifier)
|
|
if "." in identifier:
|
|
return ".".join(escape_identifier(identifier.split(".")))
|
|
if (all(char_ok_in_verilog(identifier[i],i) for i in range(0, len(identifier)))):
|
|
return identifier
|
|
return "\\"+identifier+" "
|
|
|
|
|
|
|
|
def write_vlogtb_trace(steps, index):
|
|
filename = vlogtbfile.replace("%", index)
|
|
print_msg("Writing trace to Verilog testbench: %s" % (filename))
|
|
|
|
vlogtb_topmod = topmod
|
|
vlogtb_state = "s@@step_idx@@"
|
|
|
|
if vlogtbtop is not None:
|
|
for item in vlogtbtop.split("."):
|
|
if item in smt.modinfo[vlogtb_topmod].cells:
|
|
vlogtb_state = "(|%s_h %s| %s)" % (vlogtb_topmod, item, vlogtb_state)
|
|
vlogtb_topmod = smt.modinfo[vlogtb_topmod].cells[item]
|
|
else:
|
|
print_msg("Vlog top module '%s' not found: no cell '%s' in module '%s'" % (vlogtbtop, item, vlogtb_topmod))
|
|
break
|
|
|
|
with open(filename, "w") as f:
|
|
print("`ifndef VERILATOR", file=f)
|
|
print("module testbench;", file=f)
|
|
print(" reg [4095:0] vcdfile;", file=f)
|
|
print(" reg clock;", file=f)
|
|
print("`else", file=f)
|
|
print("module testbench(input clock, output reg genclock);", file=f)
|
|
print(" initial genclock = 1;", file=f)
|
|
print("`endif", file=f)
|
|
|
|
print(" reg genclock = 1;", file=f)
|
|
print(" reg [31:0] cycle = 0;", file=f)
|
|
|
|
primary_inputs = list()
|
|
clock_inputs = set()
|
|
|
|
for name in smt.modinfo[vlogtb_topmod].inputs:
|
|
if name in ["clk", "clock", "CLK", "CLOCK"]:
|
|
clock_inputs.add(name)
|
|
width = smt.modinfo[vlogtb_topmod].wsize[name]
|
|
primary_inputs.append((name, width))
|
|
|
|
for name, width in primary_inputs:
|
|
if name in clock_inputs:
|
|
print(" wire [%d:0] %s = clock;" % (width-1, escape_identifier("PI_"+name)), file=f)
|
|
else:
|
|
print(" reg [%d:0] %s;" % (width-1, escape_identifier("PI_"+name)), file=f)
|
|
|
|
print(" %s UUT (" % escape_identifier(vlogtb_topmod), file=f)
|
|
print(",\n".join(" .%s(%s)" % (escape_identifier(name), escape_identifier("PI_"+name)) for name, _ in primary_inputs), file=f)
|
|
print(" );", file=f)
|
|
|
|
print("`ifndef VERILATOR", file=f)
|
|
print(" initial begin", file=f)
|
|
print(" if ($value$plusargs(\"vcd=%s\", vcdfile)) begin", file=f)
|
|
print(" $dumpfile(vcdfile);", file=f)
|
|
print(" $dumpvars(0, testbench);", file=f)
|
|
print(" end", file=f)
|
|
print(" #5 clock = 0;", file=f)
|
|
print(" while (genclock) begin", file=f)
|
|
print(" #5 clock = 0;", file=f)
|
|
print(" #5 clock = 1;", file=f)
|
|
print(" end", file=f)
|
|
print(" end", file=f)
|
|
print("`endif", file=f)
|
|
|
|
print(" initial begin", file=f)
|
|
|
|
regs = sorted(smt.hiernets(vlogtb_topmod, regs_only=True))
|
|
regvals = smt.get_net_bin_list(vlogtb_topmod, regs, vlogtb_state.replace("@@step_idx@@", str(steps[0])))
|
|
|
|
print("`ifndef VERILATOR", file=f)
|
|
print(" #1;", file=f)
|
|
print("`endif", file=f)
|
|
for reg, val in zip(regs, regvals):
|
|
hidden_net = False
|
|
for n in reg:
|
|
if n.startswith("$"):
|
|
hidden_net = True
|
|
print(" %sUUT.%s = %d'b%s;" % ("// " if hidden_net else "", ".".join(escape_identifier(reg)), len(val), val), file=f)
|
|
|
|
anyconsts = sorted(smt.hieranyconsts(vlogtb_topmod))
|
|
for info in anyconsts:
|
|
if info[3] is not None:
|
|
modstate = smt.net_expr(vlogtb_topmod, vlogtb_state.replace("@@step_idx@@", str(steps[0])), info[0])
|
|
value = smt.bv2bin(smt.get("(|%s| %s)" % (info[1], modstate)))
|
|
print(" UUT.%s = %d'b%s;" % (".".join(escape_identifier(info[0] + [info[3]])), len(value), value), file=f);
|
|
|
|
mems = sorted(smt.hiermems(vlogtb_topmod))
|
|
for mempath in mems:
|
|
abits, width, rports, wports, asyncwr = smt.mem_info(vlogtb_topmod, mempath)
|
|
|
|
addr_expr_list = list()
|
|
data_expr_list = list()
|
|
for i in steps:
|
|
for j in range(rports):
|
|
addr_expr_list.append(smt.mem_expr(vlogtb_topmod, vlogtb_state.replace("@@step_idx@@", str(i)), mempath, "R%dA" % j))
|
|
data_expr_list.append(smt.mem_expr(vlogtb_topmod, vlogtb_state.replace("@@step_idx@@", str(i)), mempath, "R%dD" % j))
|
|
|
|
addr_list = smt.get_list(addr_expr_list)
|
|
data_list = smt.get_list(data_expr_list)
|
|
|
|
addr_data = dict()
|
|
for addr, data in zip(addr_list, data_list):
|
|
addr = smt.bv2bin(addr)
|
|
data = smt.bv2bin(data)
|
|
if addr not in addr_data:
|
|
addr_data[addr] = data
|
|
|
|
for addr, data in addr_data.items():
|
|
print(" UUT.%s[%d'b%s] = %d'b%s;" % (".".join(escape_identifier(mempath)), len(addr), addr, len(data), data), file=f)
|
|
|
|
print("", file=f)
|
|
anyseqs = sorted(smt.hieranyseqs(vlogtb_topmod))
|
|
|
|
for i in steps:
|
|
pi_names = [[name] for name, _ in primary_inputs if name not in clock_inputs]
|
|
pi_values = smt.get_net_bin_list(vlogtb_topmod, pi_names, vlogtb_state.replace("@@step_idx@@", str(i)))
|
|
|
|
print(" // state %d" % i, file=f)
|
|
|
|
if i > 0:
|
|
print(" if (cycle == %d) begin" % (i-1), file=f)
|
|
|
|
for name, val in zip(pi_names, pi_values):
|
|
if i > 0:
|
|
print(" %s <= %d'b%s;" % (escape_identifier("PI_"+".".join(name)), len(val), val), file=f)
|
|
else:
|
|
print(" %s = %d'b%s;" % (escape_identifier("PI_"+".".join(name)), len(val), val), file=f)
|
|
|
|
for info in anyseqs:
|
|
if info[3] is not None:
|
|
modstate = smt.net_expr(vlogtb_topmod, vlogtb_state.replace("@@step_idx@@", str(i)), info[0])
|
|
value = smt.bv2bin(smt.get("(|%s| %s)" % (info[1], modstate)))
|
|
if i > 0:
|
|
print(" UUT.%s <= %d'b%s;" % (".".join(escape_identifier(info[0] + [info[3]])), len(value), value), file=f);
|
|
else:
|
|
print(" UUT.%s = %d'b%s;" % (".".join(escape_identifier(info[0] + [info[3]])), len(value), value), file=f);
|
|
|
|
if i > 0:
|
|
print(" end", file=f)
|
|
print("", file=f)
|
|
|
|
if i == 0:
|
|
print(" end", file=f)
|
|
print(" always @(posedge clock) begin", file=f)
|
|
|
|
print(" genclock <= cycle < %d;" % (steps[-1]), file=f)
|
|
print(" cycle <= cycle + 1;", file=f)
|
|
print(" end", file=f)
|
|
|
|
print("endmodule", file=f)
|
|
|
|
|
|
def write_constr_trace(steps, index):
|
|
filename = outconstr.replace("%", index)
|
|
print_msg("Writing trace to constraints file: %s" % (filename))
|
|
|
|
constr_topmod = topmod
|
|
constr_state = "s@@step_idx@@"
|
|
constr_prefix = ""
|
|
|
|
if smtctop is not None:
|
|
for item in smtctop[0].split("."):
|
|
assert item in smt.modinfo[constr_topmod].cells
|
|
constr_state = "(|%s_h %s| %s)" % (constr_topmod, item, constr_state)
|
|
constr_topmod = smt.modinfo[constr_topmod].cells[item]
|
|
if smtctop[1] != "":
|
|
constr_prefix = smtctop[1] + "."
|
|
|
|
if smtcinit:
|
|
steps = [steps[-1]]
|
|
|
|
with open(filename, "w") as f:
|
|
primary_inputs = list()
|
|
|
|
for name in smt.modinfo[constr_topmod].inputs:
|
|
width = smt.modinfo[constr_topmod].wsize[name]
|
|
primary_inputs.append((name, width))
|
|
|
|
if steps[0] == 0 or smtcinit:
|
|
print("initial", file=f)
|
|
else:
|
|
print("state %d" % steps[0], file=f)
|
|
|
|
regnames = sorted(smt.hiernets(constr_topmod, regs_only=True))
|
|
regvals = smt.get_net_list(constr_topmod, regnames, constr_state.replace("@@step_idx@@", str(steps[0])))
|
|
|
|
for name, val in zip(regnames, regvals):
|
|
print("assume (= [%s%s] %s)" % (constr_prefix, ".".join(name), val), file=f)
|
|
|
|
mems = sorted(smt.hiermems(constr_topmod))
|
|
for mempath in mems:
|
|
abits, width, rports, wports, asyncwr = smt.mem_info(constr_topmod, mempath)
|
|
|
|
addr_expr_list = list()
|
|
data_expr_list = list()
|
|
for i in steps:
|
|
for j in range(rports):
|
|
addr_expr_list.append(smt.mem_expr(constr_topmod, constr_state.replace("@@step_idx@@", str(i)), mempath, "R%dA" % j))
|
|
data_expr_list.append(smt.mem_expr(constr_topmod, constr_state.replace("@@step_idx@@", str(i)), mempath, "R%dD" % j))
|
|
|
|
addr_list = smt.get_list(addr_expr_list)
|
|
data_list = smt.get_list(data_expr_list)
|
|
|
|
addr_data = dict()
|
|
for addr, data in zip(addr_list, data_list):
|
|
if addr not in addr_data:
|
|
addr_data[addr] = data
|
|
|
|
for addr, data in addr_data.items():
|
|
print("assume (= (select [%s%s] %s) %s)" % (constr_prefix, ".".join(mempath), addr, data), file=f)
|
|
|
|
for k in steps:
|
|
if not smtcinit:
|
|
print("", file=f)
|
|
print("state %d" % k, file=f)
|
|
|
|
pi_names = [[name] for name, _ in sorted(primary_inputs)]
|
|
pi_values = smt.get_net_list(constr_topmod, pi_names, constr_state.replace("@@step_idx@@", str(k)))
|
|
|
|
for name, val in zip(pi_names, pi_values):
|
|
print("assume (= [%s%s] %s)" % (constr_prefix, ".".join(name), val), file=f)
|
|
|
|
def write_yw_trace(steps, index, allregs=False, filename=None):
|
|
if filename is None:
|
|
if outywfile is None:
|
|
return
|
|
filename = outywfile.replace("%", index)
|
|
print_msg("Writing trace to Yosys witness file: %s" % (filename))
|
|
|
|
mem_trace_data = collect_mem_trace_data(steps)
|
|
|
|
with open(filename, "w") as f:
|
|
inits, seqs, clocks, mems = smt.hierwitness(topmod, allregs)
|
|
|
|
yw = WriteWitness(f, "smtbmc")
|
|
|
|
for clock in clocks:
|
|
yw.add_clock(clock["path"], clock["offset"], clock["type"])
|
|
|
|
for seq in seqs:
|
|
seq["sig"] = yw.add_sig(seq["path"], seq["offset"], seq["width"])
|
|
|
|
for init in inits:
|
|
init["sig"] = yw.add_sig(init["path"], init["offset"], init["width"], True)
|
|
|
|
inits = seqs + inits
|
|
|
|
mem_dict = {tuple(mem["smtpath"]): mem for mem in mems}
|
|
mem_init_values = []
|
|
|
|
for path, addr, value in mem_trace_data.get(0, ()):
|
|
json_mem = mem_dict.get(tuple(path))
|
|
if not json_mem:
|
|
continue
|
|
|
|
bit_addr = addr * json_mem["width"]
|
|
uninit_chunks = [(chunk["width"] + chunk["offset"], chunk["offset"]) for chunk in json_mem["uninitialized"]]
|
|
first_chunk_nr = bisect.bisect_left(uninit_chunks, (bit_addr + 1,))
|
|
|
|
for uninit_end, uninit_offset in uninit_chunks[first_chunk_nr:]:
|
|
assert uninit_end > bit_addr
|
|
if uninit_offset > bit_addr + json_mem["width"]:
|
|
break
|
|
|
|
word_path = (*json_mem["path"], f"\\[{addr}]")
|
|
|
|
overlap_start = max(uninit_offset - bit_addr, 0)
|
|
overlap_end = min(uninit_end - bit_addr, json_mem["width"])
|
|
overlap_bits = value[len(value)-overlap_end:len(value)-overlap_start]
|
|
|
|
sig = yw.add_sig(word_path, overlap_start, overlap_end - overlap_start, True)
|
|
mem_init_values.append((sig, overlap_bits.replace("x", "?")))
|
|
|
|
exprs = []
|
|
all_sigs = []
|
|
|
|
for i, k in enumerate(steps):
|
|
step_values = WitnessValues()
|
|
|
|
if not i:
|
|
for sig, value in mem_init_values:
|
|
step_values[sig] = value
|
|
sigs = inits + seqs
|
|
else:
|
|
sigs = seqs
|
|
|
|
exprs.extend(smt.witness_net_expr(topmod, f"s{k}", sig) for sig in sigs)
|
|
|
|
all_sigs.append((step_values, sigs))
|
|
|
|
bvs = iter(smt.get_list(exprs))
|
|
|
|
for (step_values, sigs) in all_sigs:
|
|
for sig in sigs:
|
|
value = smt.bv2bin(next(bvs))
|
|
step_values[sig["sig"]] = value
|
|
yw.step(step_values)
|
|
|
|
yw.end_trace()
|
|
|
|
|
|
def write_trace(steps_start, steps_stop, index, allregs=False):
|
|
if steps_stop is None:
|
|
steps = steps_start
|
|
seq_time = True
|
|
else:
|
|
steps = list(range(steps_start, steps_stop))
|
|
seq_time = False
|
|
|
|
if vcdfile is not None:
|
|
write_vcd_trace(steps, index, seq_time=seq_time)
|
|
|
|
if vlogtbfile is not None:
|
|
write_vlogtb_trace(steps, index)
|
|
|
|
if outconstr is not None:
|
|
write_constr_trace(steps, index)
|
|
|
|
if outywfile is not None:
|
|
write_yw_trace(steps, index, allregs)
|
|
|
|
def escape_path_segment(segment):
|
|
if "." in segment:
|
|
return f"\\{segment} "
|
|
return segment
|
|
|
|
def print_failed_asserts_worker(mod, state, path, extrainfo, infomap, infokey=()):
|
|
assert mod in smt.modinfo
|
|
found_failed_assert = False
|
|
|
|
if smt.get("(|%s_a| %s)" % (mod, state)) in ["true", "#b1"]:
|
|
return
|
|
|
|
for cellname, celltype in smt.modinfo[mod].cells.items():
|
|
cell_infokey = (mod, cellname, infokey)
|
|
cell_path = path + "." + escape_path_segment(cellname)
|
|
if print_failed_asserts_worker(celltype, "(|%s_h %s| %s)" % (mod, cellname, state), cell_path, extrainfo, infomap, cell_infokey):
|
|
found_failed_assert = True
|
|
|
|
for assertfun, assertinfo in smt.modinfo[mod].asserts.items():
|
|
if smt.get("(|%s| %s)" % (assertfun, state)) in ["false", "#b0"]:
|
|
assert_key = (assertfun, infokey)
|
|
print_msg("Assert failed in %s: %s%s%s" % (path, assertinfo, extrainfo, infomap.get(assert_key, '')))
|
|
found_failed_assert = True
|
|
|
|
return found_failed_assert
|
|
|
|
|
|
def print_failed_asserts(state, final=False, extrainfo="", infomap={}):
|
|
if noinfo: return
|
|
loc_list, expr_list, value_list = get_constr_expr(constr_asserts, state, final=final, getvalues=True)
|
|
found_failed_assert = False
|
|
|
|
for loc, expr, value in zip(loc_list, expr_list, value_list):
|
|
if smt.bv2int(value) == 0:
|
|
print_msg("Assert %s failed: %s%s%s" % (loc, expr, extrainfo, infomap.get(loc, '')))
|
|
found_failed_assert = True
|
|
|
|
if not final:
|
|
if print_failed_asserts_worker(topmod, "s%d" % state, topmod, extrainfo, infomap):
|
|
found_failed_assert = True
|
|
|
|
return found_failed_assert
|
|
|
|
|
|
def print_anyconsts_worker(mod, state, path):
|
|
assert mod in smt.modinfo
|
|
|
|
for cellname, celltype in smt.modinfo[mod].cells.items():
|
|
print_anyconsts_worker(celltype, "(|%s_h %s| %s)" % (mod, cellname, state), path + "." + escape_path_segment(cellname))
|
|
|
|
for fun, info in smt.modinfo[mod].anyconsts.items():
|
|
if info[1] is None:
|
|
if not binarymode:
|
|
print_msg("Value for anyconst in %s (%s): %d" % (path, info[0], smt.bv2int(smt.get("(|%s| %s)" % (fun, state)))))
|
|
else:
|
|
print_msg("Value for anyconst in %s (%s): %s" % (path, info[0], smt.bv2bin(smt.get("(|%s| %s)" % (fun, state)))))
|
|
else:
|
|
if not binarymode:
|
|
print_msg("Value for anyconst %s.%s (%s): %d" % (path, info[1], info[0], smt.bv2int(smt.get("(|%s| %s)" % (fun, state)))))
|
|
else:
|
|
print_msg("Value for anyconst %s.%s (%s): %s" % (path, info[1], info[0], smt.bv2bin(smt.get("(|%s| %s)" % (fun, state)))))
|
|
|
|
|
|
def print_anyconsts(state):
|
|
if noinfo: return
|
|
print_anyconsts_worker(topmod, "s%d" % state, topmod)
|
|
|
|
|
|
def get_cover_list(mod, base, path=None):
|
|
path = path or mod
|
|
assert mod in smt.modinfo
|
|
|
|
cover_expr = list()
|
|
# A tuple of path and cell name
|
|
cover_desc = list()
|
|
|
|
for expr, desc in smt.modinfo[mod].covers.items():
|
|
cover_expr.append("(ite (|%s| %s) #b1 #b0)" % (expr, base))
|
|
cover_desc.append((path, desc))
|
|
|
|
for cell, submod in smt.modinfo[mod].cells.items():
|
|
cell_path = path + "." + escape_path_segment(cell)
|
|
e, d = get_cover_list(submod, "(|%s_h %s| %s)" % (mod, cell, base), cell_path)
|
|
cover_expr += e
|
|
cover_desc += d
|
|
|
|
return cover_expr, cover_desc
|
|
|
|
|
|
def get_assert_map(mod, base, path, key_base=()):
|
|
assert mod in smt.modinfo
|
|
|
|
assert_map = dict()
|
|
|
|
for expr, desc in smt.modinfo[mod].asserts.items():
|
|
assert_map[(expr, key_base)] = ("(|%s| %s)" % (expr, base), path, desc)
|
|
|
|
for cell, submod in smt.modinfo[mod].cells.items():
|
|
cell_path = path + "." + escape_path_segment(cell)
|
|
assert_map.update(get_assert_map(submod, "(|%s_h %s| %s)" % (mod, cell, base), cell_path, (mod, cell, key_base)))
|
|
|
|
return assert_map
|
|
|
|
|
|
def get_assert_keys():
|
|
keys = set()
|
|
keys.update(get_assert_map(topmod, 'state', topmod).keys())
|
|
for step_constr_asserts in constr_asserts.values():
|
|
keys.update(loc for loc, expr in step_constr_asserts)
|
|
|
|
return keys
|
|
|
|
|
|
def get_active_assert_map(step, active):
|
|
assert_map = dict()
|
|
for key, assert_data in get_assert_map(topmod, "s%s" % step, topmod).items():
|
|
if key in active:
|
|
assert_map[key] = assert_data
|
|
|
|
for loc, expr, actual_expr in zip(*get_constr_expr(constr_asserts, step, individual=True)):
|
|
if loc in active:
|
|
assert_map[loc] = (actual_expr, None, (expr, loc))
|
|
|
|
return assert_map
|
|
|
|
assume_enables = {}
|
|
|
|
def declare_assume_enables():
|
|
def recurse(mod, path, key_base=()):
|
|
for expr, desc in smt.modinfo[mod].assumes.items():
|
|
enable = f"|assume_enable {len(assume_enables)}|"
|
|
smt.smt2_assumptions[(expr, key_base)] = enable
|
|
smt.write(f"(declare-const {enable} Bool)")
|
|
assume_enables[(expr, key_base)] = (enable, path, desc)
|
|
|
|
for cell, submod in smt.modinfo[mod].cells.items():
|
|
recurse(submod, f"{path}.{cell}", (mod, cell, key_base))
|
|
|
|
recurse(topmod, topmod)
|
|
|
|
if track_assumes:
|
|
declare_assume_enables()
|
|
|
|
def smt_assert_design_assumes(step):
|
|
if not track_assumes:
|
|
smt_assert_consequent("(|%s_u| s%d)" % (topmod, step))
|
|
return
|
|
|
|
if not assume_enables:
|
|
return
|
|
|
|
def expr_for_assume(assume_key, base=None):
|
|
expr, key_base = assume_key
|
|
expr_prefix = f"(|{expr}| "
|
|
expr_suffix = ")"
|
|
while key_base:
|
|
mod, cell, key_base = key_base
|
|
expr_prefix += f"(|{mod}_h {cell}| "
|
|
expr_suffix += ")"
|
|
return f"{expr_prefix} s{step}{expr_suffix}"
|
|
|
|
for assume_key, (enable, path, desc) in assume_enables.items():
|
|
smt_assert_consequent(f"(=> {enable} {expr_for_assume(assume_key)})")
|
|
|
|
states = list()
|
|
asserts_antecedent_cache = [list()]
|
|
asserts_consequent_cache = [list()]
|
|
asserts_cache_dirty = False
|
|
|
|
def smt_state(step):
|
|
smt.write("(declare-fun s%d () |%s_s|)" % (step, topmod))
|
|
states.append("s%d" % step)
|
|
|
|
def smt_assert(expr):
|
|
if expr == "true":
|
|
return
|
|
|
|
smt.write("(assert %s)" % expr)
|
|
|
|
def smt_assert_antecedent(expr):
|
|
if expr == "true":
|
|
return
|
|
|
|
smt.write("(assert %s)" % expr)
|
|
|
|
global asserts_cache_dirty
|
|
asserts_cache_dirty = True
|
|
asserts_antecedent_cache[-1].append(expr)
|
|
|
|
def smt_assert_consequent(expr):
|
|
if expr == "true":
|
|
return
|
|
|
|
smt.write("(assert %s)" % expr)
|
|
|
|
global asserts_cache_dirty
|
|
asserts_cache_dirty = True
|
|
asserts_consequent_cache[-1].append(expr)
|
|
|
|
def smt_forall_assert():
|
|
if not smt.forall:
|
|
return
|
|
|
|
global asserts_cache_dirty
|
|
asserts_cache_dirty = False
|
|
|
|
assert (len(smt.modinfo[topmod].maximize) + len(smt.modinfo[topmod].minimize) <= 1)
|
|
|
|
def make_assert_expr(asserts_cache):
|
|
expr = list()
|
|
for lst in asserts_cache:
|
|
expr += lst
|
|
|
|
assert len(expr) != 0
|
|
|
|
if len(expr) == 1:
|
|
expr = expr[0]
|
|
else:
|
|
expr = "(and %s)" % (" ".join(expr))
|
|
return expr
|
|
|
|
antecedent_expr = make_assert_expr(asserts_antecedent_cache)
|
|
consequent_expr = make_assert_expr(asserts_consequent_cache)
|
|
|
|
states_db = set(states)
|
|
used_states_db = set()
|
|
new_antecedent_expr = list()
|
|
new_consequent_expr = list()
|
|
assert_expr = list()
|
|
|
|
def make_new_expr(new_expr, expr):
|
|
cursor = 0
|
|
while cursor < len(expr):
|
|
l = 1
|
|
if expr[cursor] in '|"':
|
|
while cursor+l+1 < len(expr) and expr[cursor] != expr[cursor+l]:
|
|
l += 1
|
|
l += 1
|
|
elif expr[cursor] not in '() ':
|
|
while cursor+l < len(expr) and expr[cursor+l] not in '|"() ':
|
|
l += 1
|
|
|
|
word = expr[cursor:cursor+l]
|
|
if word in states_db:
|
|
used_states_db.add(word)
|
|
word += "_"
|
|
|
|
new_expr.append(word)
|
|
cursor += l
|
|
|
|
make_new_expr(new_antecedent_expr, antecedent_expr)
|
|
make_new_expr(new_consequent_expr, consequent_expr)
|
|
|
|
new_antecedent_expr = ["".join(new_antecedent_expr)]
|
|
new_consequent_expr = ["".join(new_consequent_expr)]
|
|
|
|
if states[0] in used_states_db:
|
|
new_antecedent_expr.append("(|%s_ex_state_eq| %s %s_)" % (topmod, states[0], states[0]))
|
|
for s in states:
|
|
if s in used_states_db:
|
|
new_antecedent_expr.append("(|%s_ex_input_eq| %s %s_)" % (topmod, s, s))
|
|
|
|
if len(new_antecedent_expr) == 0:
|
|
new_antecedent_expr = "true"
|
|
elif len(new_antecedent_expr) == 1:
|
|
new_antecedent_expr = new_antecedent_expr[0]
|
|
else:
|
|
new_antecedent_expr = "(and %s)" % (" ".join(new_antecedent_expr))
|
|
|
|
if len(new_consequent_expr) == 0:
|
|
new_consequent_expr = "true"
|
|
elif len(new_consequent_expr) == 1:
|
|
new_consequent_expr = new_consequent_expr[0]
|
|
else:
|
|
new_consequent_expr = "(and %s)" % (" ".join(new_consequent_expr))
|
|
|
|
assert_expr.append("(assert (forall (")
|
|
first_state = True
|
|
for s in states:
|
|
if s in used_states_db:
|
|
assert_expr.append("%s(%s_ |%s_s|)" % ("" if first_state else " ", s, topmod))
|
|
first_state = False
|
|
assert_expr.append(") (=> %s %s)))" % (new_antecedent_expr, new_consequent_expr))
|
|
|
|
smt.write("".join(assert_expr))
|
|
|
|
if len(smt.modinfo[topmod].maximize) > 0:
|
|
for s in states:
|
|
if s in used_states_db:
|
|
smt.write("(maximize (|%s| %s))\n" % (smt.modinfo[topmod].maximize.copy().pop(), s))
|
|
break
|
|
|
|
if len(smt.modinfo[topmod].minimize) > 0:
|
|
for s in states:
|
|
if s in used_states_db:
|
|
smt.write("(minimize (|%s| %s))\n" % (smt.modinfo[topmod].minimize.copy().pop(), s))
|
|
break
|
|
|
|
def smt_push():
|
|
global asserts_cache_dirty
|
|
asserts_cache_dirty = True
|
|
asserts_antecedent_cache.append(list())
|
|
asserts_consequent_cache.append(list())
|
|
smt.write("(push 1)")
|
|
|
|
def smt_pop():
|
|
global asserts_cache_dirty
|
|
asserts_cache_dirty = True
|
|
asserts_antecedent_cache.pop()
|
|
asserts_consequent_cache.pop()
|
|
smt.write("(pop 1)")
|
|
|
|
def smt_check_sat(expected=["sat", "unsat"]):
|
|
if asserts_cache_dirty:
|
|
smt_forall_assert()
|
|
return smt.check_sat(expected=expected)
|
|
|
|
def report_tracked_assumptions(msg):
|
|
if track_assumes:
|
|
print_msg(msg)
|
|
for key in smt.get_unsat_assumptions(minimize=minimize_assumes):
|
|
enable, path, descr = assume_enables[key]
|
|
print_msg(f" In {path}: {descr}")
|
|
|
|
|
|
if incremental:
|
|
incremental.mainloop()
|
|
|
|
elif tempind:
|
|
retstatus = "FAILED"
|
|
skip_counter = step_size
|
|
for step in range(num_steps, -1, -1):
|
|
if smt.forall:
|
|
print_msg("Temporal induction not supported for exists-forall problems.")
|
|
break
|
|
|
|
smt_state(step)
|
|
smt_assert_design_assumes(step)
|
|
smt_assert_antecedent("(|%s_h| s%d)" % (topmod, step))
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step))
|
|
smt_assert_consequent(get_constr_expr(constr_assumes, step))
|
|
|
|
if step == num_steps:
|
|
smt_assert("(not (and (|%s_a| s%d) %s))" % (topmod, step, get_constr_expr(constr_asserts, step)))
|
|
|
|
else:
|
|
smt_assert_antecedent("(|%s_t| s%d s%d)" % (topmod, step, step+1))
|
|
smt_assert("(|%s_a| s%d)" % (topmod, step))
|
|
smt_assert(get_constr_expr(constr_asserts, step))
|
|
|
|
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_msg("Temporal induction failed!")
|
|
print_anyconsts(num_steps)
|
|
print_failed_asserts(num_steps)
|
|
write_trace(step, num_steps+1, '%', allregs=True)
|
|
if detect_loops:
|
|
loop = detect_state_loop(step, num_steps+1)
|
|
if loop:
|
|
print_msg(f"Loop detected, increasing induction depth will not help. Step {loop[0]} = step {loop[1]}")
|
|
|
|
elif dumpall:
|
|
print_anyconsts(num_steps)
|
|
print_failed_asserts(num_steps)
|
|
write_trace(step, num_steps+1, "%d" % step, allregs=True)
|
|
|
|
else:
|
|
print_msg("Temporal induction successful.")
|
|
report_tracked_assumptions("Used assumptions:")
|
|
retstatus = "PASSED"
|
|
break
|
|
|
|
elif covermode:
|
|
cover_expr, cover_desc = get_cover_list(topmod, "state")
|
|
cover_mask = "1" * len(cover_desc)
|
|
|
|
if len(cover_expr) > 1:
|
|
cover_expr = "(concat %s)" % " ".join(cover_expr)
|
|
elif len(cover_expr) == 1:
|
|
cover_expr = cover_expr[0]
|
|
else:
|
|
cover_expr = "#b0"
|
|
|
|
coveridx = 0
|
|
smt.write("(define-fun covers_0 ((state |%s_s|)) (_ BitVec %d) %s)" % (topmod, len(cover_desc), cover_expr))
|
|
|
|
step = 0
|
|
retstatus = "FAILED"
|
|
found_failed_assert = False
|
|
|
|
assert step_size == 1
|
|
|
|
while step < num_steps:
|
|
smt_state(step)
|
|
smt_assert_design_assumes(step)
|
|
smt_assert_antecedent("(|%s_h| s%d)" % (topmod, step))
|
|
smt_assert_consequent(get_constr_expr(constr_assumes, step))
|
|
|
|
if step == 0:
|
|
if noinit:
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step))
|
|
else:
|
|
smt_assert_antecedent("(|%s_i| s0)" % (topmod))
|
|
smt_assert_antecedent("(|%s_is| s0)" % (topmod))
|
|
|
|
else:
|
|
smt_assert_antecedent("(|%s_t| s%d s%d)" % (topmod, step-1, step))
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step))
|
|
|
|
if step < skip_steps:
|
|
print_msg("Skipping step %d.." % (step))
|
|
step += 1
|
|
continue
|
|
|
|
while "1" in cover_mask:
|
|
print_msg("Checking cover reachability in step %d.." % (step))
|
|
smt_push()
|
|
smt_assert("(distinct (covers_%d s%d) #b%s)" % (coveridx, step, "0" * len(cover_desc)))
|
|
|
|
if smt_check_sat() == "unsat":
|
|
report_tracked_assumptions("Used assumptions:")
|
|
smt_pop()
|
|
break
|
|
|
|
if append_steps > 0:
|
|
for i in range(step+1, step+1+append_steps):
|
|
print_msg("Appending additional step %d." % i)
|
|
smt_state(i)
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, i))
|
|
smt_assert_design_assumes(i)
|
|
smt_assert_antecedent("(|%s_h| s%d)" % (topmod, i))
|
|
smt_assert_antecedent("(|%s_t| s%d s%d)" % (topmod, i-1, i))
|
|
smt_assert_consequent(get_constr_expr(constr_assumes, i))
|
|
print_msg("Re-solving with appended steps..")
|
|
if smt_check_sat() == "unsat":
|
|
print("%s Cannot appended steps without violating assumptions!" % smt.timestamp())
|
|
report_tracked_assumptions("Conflicting assumptions:")
|
|
found_failed_assert = True
|
|
retstatus = "FAILED"
|
|
break
|
|
|
|
reached_covers = smt.bv2bin(smt.get("(covers_%d s%d)" % (coveridx, step)))
|
|
assert len(reached_covers) == len(cover_desc)
|
|
|
|
new_cover_mask = []
|
|
|
|
for i in range(len(reached_covers)):
|
|
if reached_covers[i] == "0":
|
|
new_cover_mask.append(cover_mask[i])
|
|
continue
|
|
|
|
path = cover_desc[i][0]
|
|
name = cover_desc[i][1]
|
|
print_msg("Reached cover statement in step %d at %s: %s" % (step, path, name))
|
|
new_cover_mask.append("0")
|
|
|
|
cover_mask = "".join(new_cover_mask)
|
|
|
|
for i in range(step+1+append_steps):
|
|
if print_failed_asserts(i, extrainfo=" (step %d)" % i):
|
|
found_failed_assert = True
|
|
|
|
write_trace(0, step+1+append_steps, "%d" % coveridx)
|
|
|
|
if found_failed_assert:
|
|
break
|
|
|
|
coveridx += 1
|
|
smt_pop()
|
|
smt.write("(define-fun covers_%d ((state |%s_s|)) (_ BitVec %d) (bvand (covers_%d state) #b%s))" % (coveridx, topmod, len(cover_desc), coveridx-1, cover_mask))
|
|
|
|
if found_failed_assert and not keep_going:
|
|
break
|
|
|
|
if "1" not in cover_mask:
|
|
retstatus = "PASSED"
|
|
break
|
|
|
|
step += 1
|
|
|
|
if "1" in cover_mask:
|
|
for i in range(len(cover_mask)):
|
|
if cover_mask[i] == "1":
|
|
print_msg("Unreached cover statement at %s: %s" % (cover_desc[i][0], cover_desc[i][1]))
|
|
|
|
else: # not tempind, covermode
|
|
active_assert_keys = get_assert_keys()
|
|
failed_assert_infomap = dict()
|
|
traceidx = 0
|
|
|
|
step = 0
|
|
retstatus = "PASSED"
|
|
while step < num_steps:
|
|
smt_state(step)
|
|
smt_assert_design_assumes(step)
|
|
smt_assert_antecedent("(|%s_h| s%d)" % (topmod, step))
|
|
smt_assert_consequent(get_constr_expr(constr_assumes, step))
|
|
|
|
if step == 0:
|
|
if noinit:
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step))
|
|
else:
|
|
smt_assert_antecedent("(|%s_i| s0)" % (topmod))
|
|
smt_assert_antecedent("(|%s_is| s0)" % (topmod))
|
|
|
|
else:
|
|
smt_assert_antecedent("(|%s_t| s%d s%d)" % (topmod, step-1, step))
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step))
|
|
|
|
if step < skip_steps:
|
|
if assume_skipped is not None and step >= assume_skipped:
|
|
print_msg("Skipping step %d (and assuming pass).." % (step))
|
|
smt_assert("(|%s_a| s%d)" % (topmod, step))
|
|
smt_assert(get_constr_expr(constr_asserts, step))
|
|
else:
|
|
print_msg("Skipping step %d.." % (step))
|
|
step += 1
|
|
continue
|
|
|
|
last_check_step = step
|
|
for i in range(1, step_size):
|
|
if step+i < num_steps:
|
|
smt_state(step+i)
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, step+i))
|
|
smt_assert_design_assumes(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_msg("Assumptions are unsatisfiable!")
|
|
report_tracked_assumptions("Conficting assumptions:")
|
|
retstatus = "PREUNSAT"
|
|
break
|
|
|
|
if not final_only:
|
|
recheck_current_step = True
|
|
while recheck_current_step:
|
|
recheck_current_step = False
|
|
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()
|
|
|
|
active_assert_maps = dict()
|
|
active_assert_exprs = list()
|
|
for i in range(step, last_check_step+1):
|
|
assert_expr_map = get_active_assert_map(i, active_assert_keys)
|
|
active_assert_maps[i] = assert_expr_map
|
|
active_assert_exprs.extend(assert_data[0] for assert_data in assert_expr_map.values())
|
|
|
|
if active_assert_exprs:
|
|
if len(active_assert_exprs) == 1:
|
|
active_assert_expr = active_assert_exprs[0]
|
|
else:
|
|
active_assert_expr = "(and %s)" % " ".join(active_assert_exprs)
|
|
|
|
smt_assert("(not %s)" % active_assert_expr)
|
|
else:
|
|
active_assert_expr = "true"
|
|
smt_assert("false")
|
|
|
|
|
|
if smt_check_sat() == "sat":
|
|
if retstatus != "FAILED":
|
|
print("%s BMC failed!" % smt.timestamp())
|
|
|
|
if check_witness:
|
|
print_msg("Checking witness constraints...")
|
|
smt_pop()
|
|
smt_push()
|
|
smt_assert(active_assert_expr)
|
|
if smt_check_sat() != "sat":
|
|
retstatus = "PASSED"
|
|
check_witness = False
|
|
num_steps = -1
|
|
break
|
|
|
|
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_state(i)
|
|
smt_assert_antecedent("(not (|%s_is| s%d))" % (topmod, i))
|
|
smt_assert_design_assumes(i)
|
|
smt_assert_antecedent("(|%s_h| s%d)" % (topmod, i))
|
|
smt_assert_antecedent("(|%s_t| s%d s%d)" % (topmod, i-1, i))
|
|
smt_assert_consequent(get_constr_expr(constr_assumes, i))
|
|
print_msg("Re-solving with appended steps..")
|
|
if smt_check_sat() == "unsat":
|
|
print_msg("Cannot append steps without violating assumptions!")
|
|
report_tracked_assumptions("Conflicting assumptions:")
|
|
retstatus = "FAILED"
|
|
break
|
|
print_anyconsts(step)
|
|
|
|
for i in range(step, last_check_step+1):
|
|
print_failed_asserts(i, infomap=failed_assert_infomap)
|
|
|
|
if keep_going:
|
|
for i in range(step, last_check_step+1):
|
|
for key, (expr, path, desc) in active_assert_maps[i].items():
|
|
if key in active_assert_keys and not smt.bv2int(smt.get(expr)):
|
|
failed_assert_infomap[key] = " [failed before]"
|
|
|
|
active_assert_keys.remove(key)
|
|
|
|
if active_assert_keys:
|
|
recheck_current_step = True
|
|
|
|
write_trace(0, last_check_step+1+append_steps, "%d" % traceidx if keep_going else '%')
|
|
traceidx += 1
|
|
retstatus = "FAILED"
|
|
|
|
smt_pop()
|
|
if recheck_current_step:
|
|
print_msg("Checking remaining assertions..")
|
|
|
|
if retstatus == "FAILED" and not (keep_going and active_assert_keys):
|
|
break
|
|
|
|
if (constr_final_start is not None) or (last_check_step+1 != num_steps):
|
|
for i in range(step, last_check_step+1):
|
|
assert_expr_map = get_active_assert_map(i, active_assert_keys)
|
|
for assert_data in assert_expr_map.values():
|
|
smt_assert(assert_data[0])
|
|
|
|
if constr_final_start is not None:
|
|
for i in range(step, last_check_step+1):
|
|
if i < constr_final_start:
|
|
continue
|
|
|
|
print_msg("Checking final constraints in step %d.." % (i))
|
|
smt_push()
|
|
|
|
smt_assert_consequent(get_constr_expr(constr_assumes, i, final=True))
|
|
smt_assert("(not %s)" % get_constr_expr(constr_asserts, i, final=True))
|
|
|
|
if smt_check_sat() == "sat":
|
|
print("%s BMC failed!" % smt.timestamp())
|
|
print_anyconsts(i)
|
|
print_failed_asserts(i, final=True)
|
|
write_trace(0, i+1, '%')
|
|
retstatus = "FAILED"
|
|
break
|
|
|
|
smt_pop()
|
|
if retstatus == "FAILED" or retstatus == "PREUNSAT":
|
|
break
|
|
|
|
else: # gentrace
|
|
for i in range(step, last_check_step+1):
|
|
smt_assert("(|%s_a| s%d)" % (topmod, i))
|
|
smt_assert(get_constr_expr(constr_asserts, i))
|
|
|
|
print_msg("Solving for step %d.." % (last_check_step))
|
|
status = smt_check_sat()
|
|
if status != "sat":
|
|
print("%s No solution found! (%s)" % (smt.timestamp(), status))
|
|
retstatus = "FAILED"
|
|
break
|
|
|
|
elif dumpall:
|
|
print_anyconsts(0)
|
|
write_trace(0, last_check_step+1, "%d" % step)
|
|
|
|
step += step_size
|
|
|
|
if gentrace and retstatus == "PASSED":
|
|
print_anyconsts(0)
|
|
write_trace(0, num_steps, '%')
|
|
|
|
if check_witness:
|
|
retstatus = "FAILED"
|
|
|
|
smt.write("(exit)")
|
|
smt.wait()
|
|
|
|
if not incremental:
|
|
print_msg("Status: %s" % retstatus)
|
|
sys.exit(0 if retstatus == "PASSED" else 1)
|