smt

How do I debug missing variables from SMT-Lib output?

由 夙愿已清 提交于 2020-07-23 06:23:15
问题 Based on this very helpful answer I rewrote my solver-for-a-stateful-program to use the Query monad and an ever-increasing list of SMT variables standing for the inputs. I expected one of two outcomes from this: either the first part (generating the SMTLib output) is sped up a lot and becomes usable, or it still remains so slow that it might as well not work. However, instead I get an error message from the SMT solver (Z3 in my case) complaining about a missing SMT variable in the SMTLib

How do I debug missing variables from SMT-Lib output?

由 会有一股神秘感。 提交于 2020-07-23 06:22:30
问题 Based on this very helpful answer I rewrote my solver-for-a-stateful-program to use the Query monad and an ever-increasing list of SMT variables standing for the inputs. I expected one of two outcomes from this: either the first part (generating the SMTLib output) is sped up a lot and becomes usable, or it still remains so slow that it might as well not work. However, instead I get an error message from the SMT solver (Z3 in my case) complaining about a missing SMT variable in the SMTLib

What is the best way to translate Z3's AST into ASM code? [closed]

由 怎甘沉沦 提交于 2020-05-17 06:05:21
问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 days ago . There is an example: mov edi, dword ptr [0x7fc70000] add edi, 0x11 sub edi, 0x33F0B753 After Z3 simplification I have got (memory 0x7FC70000 is symbolized): bvadd (_ bv3423553726 32) MEM_0x7FC70000 Now I need to convert Z3 into ASM to get result like this: mov edi, 0xCC0F48BE add edi,

How to execute the following SMT-LIB code using Alt-Ergo

由 与世无争的帅哥 提交于 2020-05-17 05:41:40
问题 The following SMT-LIB code runs without problems in Z3, MathSat and CVC4 but it is not running in Alt-Ergo, please let me know what happens, many thanks: (set-logic QF_UF) (set-option :incremental true) (set-option :produce-models true) (declare-fun m () Bool) (declare-fun p () Bool) (declare-fun b () Bool) (declare-fun c () Bool) (declare-fun r () Bool) (declare-fun al () Bool) (declare-fun all () Bool) (declare-fun la () Bool) (declare-fun lal () Bool) (declare-fun g () Bool) (declare-fun a

去除SMT全自动锡膏印刷机误印锡膏的技巧

由 微笑、不失礼 提交于 2020-04-05 14:52:39
对于高密度间距钢网，如果由于薄的钢网横截面弯曲造成引脚之间的损伤，它会造成锡膏沉积在引脚之间产生印刷缺陷。SMT全自动锡膏印刷机存在印刷缺陷的线路板要去除误印的锡膏，凯格精密机械有限公司给大家介绍一下，怎么去除SMT全自动锡膏印刷机误印刷的锡膏。 1、用小刮铲刮的方法：将锡膏从误印的PCB板上直接去掉即可。但这样做可能造成一些问题。一般可行的最好办法是，将误印的板浸入一种兼容的溶剂中，如加入某种添加剂的水，洗板水也可以，然后用软毛刷子将小锡珠从板上去除。 对于SMT全自动锡膏印刷机误印刷的多余锡膏，宁愿反复的浸泡与洗刷，而不要猛烈的干刷或铲刮。在锡膏印刷之后，操作员等待清洗误印的时间越长，越难去掉锡膏。被误印的板应该在发现问题之后马上放入浸泡的溶剂中，因为锡膏在干之前容易清除。 2、被SMT全自动锡膏印刷机误印刷的多余锡膏要用轻柔的喷雾冲刷，避免用布条去抹擦，以防止锡膏和其他污染物涂抹在板的表面上。在浸泡之后，经常可以帮助去掉不希望有的锡膏。 3、同时还推荐用热风干燥。如果使用了卧式模板清洗机，要清洗的面应该朝下，以允许锡膏从板上掉落。 深圳德森精密设备有限公司从事 点胶机 、涂覆机、全自动锡膏印刷机、 smt锡膏印刷机 研发生产销售为一体的smt锡膏印刷机厂家，提供全自动锡膏印刷机,smt锡膏印刷机定制，想要订购点胶机、涂覆机、锡膏印刷机，热线：0755-33666525；

dafny output as SMT file

由 余生长醉 提交于 2020-03-05 04:13:26
问题 I successfully wrote a verified Dafny program that given an integer array, returns the length of the longest monotone prefix. The permalink is here. I want to be able to examine the SMT file Dafny used, even though there were no errors. I tried various flag options like: $ dafny example_longest_monotone.dfy /useSmtOutputFormat /printModelToFile:smt_file.smt But none seem to work? Am I wrong thinking that there must be some underlying SMT query that returned unsat in the case where Dafny

Executing get-model or unsat-core depending on solver's decision

由 只愿长相守 提交于 2020-01-23 10:42:51
问题 I wonder, if there is a possibility in a SMT-LIB 2.0 script to access the last satisfiability decision of a solver (sat, unsat, ...). For example, the following code: (set-option :produce-unsat-cores true) (set-option :produce-models true) (set-logic QF_UF) (declare-fun p () Bool) (declare-fun q () Bool) (declare-fun r () Bool) (assert (! (=> p q) :named PQ)) (assert (! (=> q r) :named QR)) (assert (! (not (=> p r)) :named nPR)) (check-sat) (get-model) (get-unsat-core) ran in Z3 returns:

Substitution in Z3 java

由 左心房为你撑大大i 提交于 2020-01-15 12:24:08
问题 Noticed that when call substitution in z3, it always simplifies the expression, but in our project, it is necessary to just substitute and keep the original structure. According to the following post, such feature will be fixed, wonder if it is already there? Or if there's any way to turn the simplification off? substitution in Z3Py 回答1: Yes, this problem has been fixed in the unstable branch (see here); this should now behave exactly as expected. 来源： https://stackoverflow.com/questions

Substitution in Z3 java

由 泄露秘密 提交于 2020-01-15 12:24:08
问题 Noticed that when call substitution in z3, it always simplifies the expression, but in our project, it is necessary to just substitute and keep the original structure. According to the following post, such feature will be fixed, wonder if it is already there? Or if there's any way to turn the simplification off? substitution in Z3Py 回答1: Yes, this problem has been fixed in the unstable branch (see here); this should now behave exactly as expected. 来源： https://stackoverflow.com/questions

Getting the smaller model for a SMT formula

由 走远了吗. 提交于 2020-01-15 10:09:34
问题 Let say that I have some formulas that can be sat but I want to get the smaller (or larger) possible value so sat that formula. Is there a way to tell the SMT solver to give that kind of small solution? Example: a+1>10 In that example I want the SMT solver to give me the solution 10 instead of 100. Cheers NOTE: I have just seen a similar question answered by one of the z3 authors saying, three years ago, that they were implementing that functionality in z3. Do you know if it is already
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