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Formal Verification (FV) techniques ensure 100% functional correctness and they are more reliable and cost effective, less time consuming. The main concept of FV is not to simulate some vectors, instead prove the functional correctness of a design.
In Formal Verification process Design Under Test (DUT) is compared with proven design or set of properties (or specifications).
Formal verification is a systematic process that uses mathematical reasoning to verify that design intent (spec) is preserved in implementation (RTL). With formal verification such as Jasper's, one can exhaustively verify that a certain scenario will not occur and corner case bugs are found without any input stimulus or testbench. Jasper is the leading formal property checking solution out there. See the article below on "What is Formal Verification" for more information...let me know if you have any questions.
Formal verification is technique which verifies that functionality of RTL & Netlist generated are same . There are various tools available in the market to do formal verification . one is Synopsys tool "Formality"
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