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19 Commits

Author SHA1 Message Date
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
Clifford Wolf b13e6bd375 Add smtbmc support for exist-forall problems 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-02-23 19:33:30 +01:00
Clifford Wolf eb67a7532b Add $allconst and $allseq cell types 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-02-23 13:14:47 +01:00
Clifford Wolf bdc316db50 Added $anyseq cell type 2016-10-14 15:24:03 +02:00
Clifford Wolf 14bfd3c5c1 yosys-smtbmc meminit support 2016-09-08 11:16:12 +02:00
Clifford Wolf cb7dbf4070 Improvements in assertpmux 2016-09-07 12:42:16 +02:00
Clifford Wolf 068d5bc02f Made examples/smtbmc/demo1.v more interesting 2016-09-02 13:54:24 +02:00
Clifford Wolf aa25a4cec6 Added $anyconst support to yosys-smtbmc 2016-08-30 19:27:42 +02:00
Clifford Wolf b04a40d9fe Made "write_smt2 -bv -mem" default, added "write_smt2 -nobv -nomem" 2016-08-30 12:40:09 +02:00
Clifford Wolf eae390ae17 Removed $predict again 2016-08-28 21:35:33 +02:00
Clifford Wolf adcda6817e Added smtc "final" statement 2016-08-27 14:30:36 +02:00
Clifford Wolf ad56ad44c3 More yosys-smtbmc smtc features 2016-08-24 23:18:29 +02:00
Clifford Wolf ee3e7a0e45 yosys-smtbmc --smtc -g 2016-08-24 22:09:50 +02:00
Clifford Wolf 2bd30e2026 Added "yosys-smtbmc --dump-constr" 2016-08-22 16:48:46 +02:00
Clifford Wolf a93fcec93f Added examples/smtbmc/demo2.v 2016-08-20 18:44:27 +02:00
Clifford Wolf a889acb897 Added smtbmc longopt support 2016-08-20 16:07:59 +02:00
Clifford Wolf da56a5bbc6 Added $initstate support to smtbmc flow 2016-07-27 16:11:37 +02:00
Clifford Wolf d7763634b6 After reading the SV spec, using non-standard predict() instead of expect() 2016-07-21 13:34:33 +02:00
Clifford Wolf b3155af5f6 Added examples/smtbmc 2016-07-13 09:49:05 +02:00