Layered duplicate detection in external memory model checking. Weimplementandrefinetheram efficient andnotpreviouslyimplementedalgorithmofgastinandmoro34to. Memtest86 is a completely free, standalone, and extremely easy to use memory test software program. Pdf flashefficient ltl model checking with minimal. The nested depthfirst search ndfs algorithm detects accepting cycles efficiently. If you only have time to try one memory test tool on this page, try memtest86. For this purpose we exploit the fact that some of the basic algorithms for probabilistic model checking. Revisiting resistance speeds up io efficient ltl model checking, tools and algorithms for the construction and analysis of systems. Flash memory efficient ltl model checking sciencedirect. Efficient probabilistic model checking on general purpose.
They cover topics such as model checking, testing, software. Journal on software tools for technology transfer 523, 185 204. External memory model checking with solid state disks. Each page in turn consists of 512 bytes of the main data area and 16 bytes of the spare area. Strategic application of offtheshelf formal verification tools to the device driver of onenand flash memory. Since the characteristics of flash memories are different to magnetic hard disks, the existing io complexity model is no longer sufficient. For flash memory efficient offline ltl model checking, which aims at generating a minimal counterexample and scans the entire state space at least once, we analyze the effect of outsourcing a. However, you may wonder about the quality of the usb flash drives that are sold at a much cheaper price and here are three free software that you can use to check. All results are taken from the jlink commander output. These tests were performed with jlink commander by placing an image of the full flash size of the device into the flash memory of the device. But few of them actually work as well as they advertise. For flash memory efficient onthefly ltl model checking, which aims at finding any counterexample to the specified ltl property, we study hash functions adapted to the twolevel hierarchy of ram and flash memory.
Join researchgate to find the people and research you need to help your work. Formal verification of a flash memory device driveran experience report. Flash memory is an electronic solidstate nonvolatile computer memory storage medium that can be electrically erased and reprogrammed. Linear temporal logic ltl model checking is a very important and popular technique for the automatic verification of safetycritical hardware and software systems, aiming at ensuring their. Flash memory efficient ltl model checking masarykova. Each programming model has advantages and disadvantages. The former provides up to 82foot flash range whereas the latter up to 42foot flash range. Revisiting resistance speeds up io efficient ltl model checking. Since the characteristics of flash memories are different to magnetic hard disks, the existing io complexity model. Solid state disks based on flash memory are an apparent alternative to hard disks for external memory search. This paper explains about nandtype flash memory and also defines the role of an intermediate software layer called ftl and various ftl algorithms as a solution to the hardware issues.
How hard is finding shortest counterexample lassos in model. If the target bitfile is corrupted in the flash memory the user design does not configure and the fpga does not function. Formal verification of a flash memory device driver an experience report moonzoo kim, yunja choi, yunho kim and hotae kim. Download free usb flashpen drive repair tool and recover. In this model a 1bit semiexternal io efficient ltl model checking algorithm is proposed that generates minimal counterexamples. For flash memory efficient offline ltl model checking, which aims at generating a minimal counterexample and scans the entire state space at least once, we analyze the effect of outsourcing a memorybased perfect hash function from ram to flash memory. We invent a complexity model to analyze the effect of outsourcing the perfect hash function from random access to flash memory. Simply download the program from memtest86s site and put it on a flash drive. Standard template library for xxl data sets we present a software library stxxl, that enables practiceoriented experimentation with huge data sets. It then mitigates the problem by reconfiguring the fpga with a known good golden bitfile from the flash memory. A flash bootloader module is designed to update the firmware without the use of any specialized hardware such as jtag. Following is the flowchart of the steps involved in ecu reprogramming using flash bootloader. Spin can be used as a full ltl model checking system, supporting all correctness requirements expressible in linear time temporal logic, but it can also be used as an efficient onthefly verifier for more basic safety and liveness properties. The papers strive to promote research and development for the improvement of formal methods and tools for industrial applications.
On the way to parallel and distributed explicit state ltl model checking. Developed for use with transcend ssd products, transcend ssd scope is an advanced and userfriendly software that makes it easier than ever to maintain a healthy and efficient ssd. Proceedings of the sixth ieee international conference on software engineering. Usb flash drives are very common today and you can easily find a cheap one sold in ebay. Flashefficient ltl model checking with minimal counterexamples. Infrared wildlife camera ltl 6210 is a modernized upgraded model of a popular ltl 6210 trail camera. Model check hash function random access memory external memory internal memory. Cuda is an interface by nvidia which is used to program gpus. In this setting, we obtain new tradeoffs between time and space for io efficient ltl model checking. Random reads are much faster, while random writes are generally not. Model checking, flash memory and memory researchgate, the professional network for. We present algorithms for parallel probabilistic model checking on general purpose graphic processing units gpgpus. In this paper, we illustrate how this influences the timespace tradeoffs for scaling semiexternal ltl model checking.
In this model a 1bit semiexternal io efficient ltl model checking. In tools and algorithms for the construction and analysis of systems. Expressive and efficient bounded model checking of. To achieve a low internal memory consumption, we construct a ram efficient. Use of the direct register access model generally results in smaller and more efficient code than using the software driver model. The flash download performance with jlink has been tested with various devices.
First, we design a cbit semiexternal algorithm for depthfirst search. Flash efficient ltl model checking with minimal counterexamples. The two main types of flash memory are named after the nand and nor logic gates. Model checking is an efficient and automated formal verification method for. Formal methods for industrial critical systems springerlink. An efficient solution for model checking abstract state. Dataflashs advanced dual sram buffer architecture makes it the most efficient memory for data logging. It also incorporates a suite of advanced features that save system power, reduce processtor overhead, simplify software. Scalable multicore ltl model checking, model checking software. It supports parallel disks, overlapping between io and computation and is the first external memory. Flash memory efficient ltl model checking, science of computer programming.
This article surveys and gives historical accounts to the algorithmic essentials of directed model checking, a promising bughunting technique to mitigate the state explosion problem. I o efficient model checking uses external memory to save visited states during. The ltl model checking problem is reducible to finding accepting cycles in a graph. Flash efficient ltl model checking with minimal counterexamples abstract. Many of the latter properties can be expressed, and verified, without the use of ltl. Flash memory efficient ltl model checking request pdf. The page is the basic unit of read and write operations in nand flash memory. A nand flash memory chip is composed of a fixed number of blocks, where each block typically has 32 pages.
Understanding what is flash bootloader ecu reprogramming. Flashefficient ltl model checking with minimal counterexamples abstract. Distribution of explicitstate ltl model checking, 8th international workshop on formal methods for industrial. Each model can be used independently or combined, based on the needs of the application or the programming environment desired by the developer. Model checking software requirement specifications using domain reduction abstraction. Graphs logic cgl which is similar to the ctl temporal logic. Onthefly, ltl model checking with spin formal verification. The of 940nm ir led, however, is it emits noglow flash that is invisible in the dark.
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