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109 Commits

Author SHA1 Message Date
Jannis Harder 8838b1eaa4 smtbmc: Fix witness handling for k-induction failures 
The "uninitialized" value is a _list_ of chunks that are part of the
initial state for the witness trace.
 2022-10-18 19:51:36 +02:00
Jannis Harder 4d334fd3e3 smt2/smtbmc: Fix FF witness data for fine grained or multi chunk FFs 
The witness metadata was missing fine grained FFs completely and for
coarse grained FFs where the output connection has multiple chunks it
lacked the offset of the chunk within the SMT expression. This fixes
both, the later by adding an "smtoffset" field to the metadata.
 2022-10-12 19:48:36 +02:00
Jannis Harder 1d40f5e8fa smtbmc: Avoid unnecessary string copies when parsing solver output 2022-09-02 22:37:08 +02:00
Jannis Harder f041e36c6e smtbmc: Add native json based witness format + smt2 backend support 
This adds a native json based witness trace format. By having a common
format that includes everything we support, and providing a conversion
utility (yosys-witness) we no longer need to implement every format for
every tool that deals with witness traces, avoiding a quadratic
opportunity to introduce subtle bugs.

Included:

  * smt2: New yosys-smt2-witness info lines containing full hierarchical
    paths without lossy escaping.
  * yosys-smtbmc --dump-yw trace.yw: Dump results in the new format.
  * yosys-smtbmc --yw trace.yw: Read new format as constraints.
  * yosys-witness: New tool to convert witness formats.
    Currently this can only display traces in a human-readable-only
    format and do a passthrough read/write of the new format.
  * ywio.py: Small python lib for reading and writing the new format.
    Used by yosys-smtbmc and yosys-witness to avoid duplication.
 2022-08-16 13:37:30 +02:00
Miodrag Milanovic 4444d5cf68 Switched to utf-8 in smtio.py 2022-08-09 12:54:48 +02:00
Jannis Harder 0c5f62f6ff smtbmc: noincr: keep solver running for post check-sat unrolling 2022-06-08 13:20:25 +02:00
Jannis Harder 6db2948938
Merge pull request #3357 from jix/smtbmc-cvc5 
smtbmc: recognize cvc5 and fix unrolling for cvc4/cvc5
 2022-06-08 12:52:51 +02:00
Jannis Harder ab9e887dee smtbmc: Force nonincremental mode when yices is used with forall 2022-06-03 16:45:23 +02:00
Jannis Harder 0207d7b0cf smtbmc: recognize cvc5 and fix unrolling for cvc4/cvc5 2022-06-03 16:24:09 +02:00
Jannis Harder d25daa6203 smtbmc: Avoid unnecessary deep copies during unrolling 2022-03-28 13:03:48 +02:00
N. Engelhardt dc739362c7 print cell name for properties in yosys-smtbmc 2022-02-22 17:00:10 +01:00
GCHQDeveloper560 4379375d89 Add support for the Bitwuzla solver 2021-07-12 22:07:58 +02:00
Claire Xenia Wolf 72787f52fc Fixing old e-mail addresses and deadnames 
s/((Claire|Xen|Xenia|Clifford)\s+)+(Wolf|Xen)\s+<(claire|clifford)@(symbioticeda.com|clifford.at|yosyshq.com)>/Claire Xenia Wolf <claire@yosyshq.com>/gi;
s/((Nina|Nak|N\.)\s+)+Engelhardt\s+<nak@(symbioticeda.com|yosyshq.com)>/N. Engelhardt <nak@yosyshq.com>/gi;
s/((David)\s+)+Shah\s+<(dave|david)@(symbioticeda.com|yosyshq.com|ds0.me)>/David Shah <dave@ds0.me>/gi;
s/((Miodrag)\s+)+Milanovic\s+<(miodrag|micko)@(symbioticeda.com|yosyshq.com)>/Miodrag Milanovic <micko@yosyshq.com>/gi;
s,https?://www.clifford.at/yosys/,http://yosyshq.net/yosys/,g;
 2021-06-08 00:39:36 +02:00
Alberto Gonzalez 42fb75c570
smtio: Emit `mode: start` options before `set-logic` command and any other options after it. 
Refer to the SMT-LIB specification, section 4.1.7.  According to the spec, some options can only be specified in `start` mode.  Once the solver sees `set-logic`, it moves to `assert` mode.
 2020-07-20 22:09:44 +00:00
Alberto Gonzalez 654864658f
smtio: Add support for parsing `yosys-smt2-solver-option` info statements. 2020-07-20 21:54:56 +00:00
Claire Wolf a207cb362c Only allow "sat" and "unsat" smt solver responses in yosys-smtbmc 
Signed-off-by: Claire Wolf <claire@symbioticeda.com>
 2020-07-20 19:35:32 +02:00
Yehowshua Immanuel da0778350b
more reasonable numbers for memory 2020-06-04 17:00:04 -04:00
Yehowshua Immanuel 5d29a9f633
MacOS has even stricter stack limits in catalina. 
Invoking sby in macOS Catalina fails because of bizarre stack limits in Catalina.
 2020-06-04 14:01:56 -04:00
Alberto Gonzalez ea30465107
smtbmc: Remove superfluous `yosys-smt2-timeout` file macro. 
Co-Authored-By: clairexen <claire@symbioticeda.com>
 2020-05-29 21:33:00 +00:00
Alberto Gonzalez 9847a4eea8
smtbmc and qbfsat: Add timeout option to set solver timeouts for Z3, Yices, and CVC4. 2020-05-25 20:39:30 +00:00
Alberto Gonzalez 54570a3978
qbfsat: Move SMT2 info statements back to the top of the file. 2020-05-25 20:38:29 +00:00
Alberto Gonzalez 903456c267
qbfsat: Add `-solver` option and allow choice of Z3 or Yices, making Yices the default. 
Ensures that "BV" is the logic whenever solving an exists-forall problem with Yices, moves the "(set-logic ...)" directive above any non-info line, sets the `ef-max-iters` parameter to a very high number when using Yices in exists-forall mode so as not to prematurely abandon difficult problems, and does not provide the incompatible "--incremental" Yices argument when in exists-forall mode.
 2020-05-25 20:38:29 +00:00
Alberto Gonzalez d72cb8ea2a
Do not change solver output parsing for non-exists-forall problems. 2020-03-26 23:00:00 +00:00
Alberto Gonzalez 5accf08ef9
Skip reading stdout from the solver that if it isn't a line reading only "sat", "unsat", or "unknown". 2020-03-26 01:21:01 +00:00
Claire Wolf c9555c9ade Revert part of 0fda8308 from #1746 that broke other smtbmc flows 
Signed-off-by: Claire Wolf <claire@symbioticeda.com>
 2020-03-24 17:33:46 +01:00
Alberto Gonzalez 0fda8308bc Add support for optimizing exists-forall problems. 
Modifies smt2 backend to recognize `$anyconst` etc. assigned to a wire with the `maximize` or `minimize` attribute and emit `; yosys-smt2-maximize` or `; yosys-smt2-minimize` directives as appropriate.
Modifies `backends/smt2/smtbmc.py` and `smtio.py` to recognize those directives and emit a `(maximize ...)` or `(minimize ...)` command at the end of `smt_forall_assert()`, as described in the paper "νZ - An Optimizing SMT Solver" by Nikolaj Bjørner et al.
Adds an example `examples/smtbmc/demo9.v` to show how it can be used.
 2020-03-13 17:10:29 +00:00
Claire Wolf 485f31f681 Improve yosys-smtbmc "solver not found" handling 
Signed-off-by: Claire Wolf <clifford@clifford.at>
 2020-01-27 17:48:56 +01:00
Clifford Wolf f02623abb5 Bugfix in smtio vcd handling of $-identifiers 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-10-23 00:04:34 +02:00
N. Engelhardt ab4b9e8db4 smt: handle failure of setrlimit syscall 2019-07-15 23:33:18 +08:00
Clifford Wolf b3c36b4448 Escape scope names starting with dollar sign in smtio.py 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-26 10:58:39 +02:00
Clifford Wolf c23bbc4291 Add timescale and generated-by header to yosys-smtbmc MkVcd 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-06-16 23:12:03 +02:00
Clifford Wolf e112d2fbf5 Add missing blackslash-to-slash convertion to smtio.py (matching Smt2Worker::get_id() behavior) 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-06 16:35:59 +01:00
Clifford Wolf 825b4c1aa9
Merge pull request #693 from YosysHQ/rlimit 
improve rlimit handling in smtio.py
 2018-11-07 20:16:40 +01:00
Clifford Wolf b54bf7c0f9 Limit stack size to 16 MB on Darwin 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-07 15:32:34 +01:00
Clifford Wolf f6c4485a3a Run solver in non-incremental mode whem smtio.py is configured for non-incremental solving 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-06 11:11:05 +01:00
Clifford Wolf 4c50e3abb9 Fix for improved smtio.py rlimit code 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-06 10:09:03 +01:00
Clifford Wolf 79075d123f Improve stack rlimit code in smtio.py 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-11-06 10:05:23 +01:00
Arjen Roodselaar 2b93542171 Use conservative stack size for SMT2 on MacOS 2018-11-04 21:58:09 -08:00
William D. Jones 0caa62802c Gate POSIX-only signals and resource module to only run on POSIX Python implementations. 2018-07-06 01:44:34 -04:00
Clifford Wolf 4d6af2969c Add smtio.py support for parsing SMT2 (_ bvX n) syntax for BitVec constants 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-04-04 18:12:27 +02:00
Clifford Wolf dd5fab69c1 Add smtio status msgs when --progress is inactive 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-29 21:59:30 +02:00
Clifford Wolf a48c7e5abf Bugfix in smtio.py VCD file generator 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-29 12:45:31 +02:00
Clifford Wolf 3f00702475 Improve yosys-smtbmc log output and error handling 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-17 18:06:17 +01:00
Clifford Wolf 4d4e3a8ca6 Improve handling of invalid check-sat result in smtio.py 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-17 12:17:53 +01:00
Clifford Wolf 3545c0fffb Remove debug prints from yosys-smtbmc VCD writer 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-08 16:24:35 +01:00
Clifford Wolf 8b604004da Check results of (check-sat) in yosys-smtbmc 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-07 22:54:19 +01:00
Clifford Wolf cedbc35f4b Imporove yosys-smtbmc error handling, Improve VCD output 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-05 12:17:22 +01:00
Clifford Wolf 45a6fce92c Fix a hangup in yosys-smtbmc error handling 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-04 21:13:30 +01:00
Clifford Wolf ae4e204c76 Improved error handling in yosys-smtbmc 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-03 20:00:07 +01:00
Clifford Wolf a44e1edaa3 Terminate running SMT solver when smtbmc is terminated 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-03 14:50:40 +01:00