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Ladder Logics is a programming language standardized in IEC 61131-3 and widely used for programming industrial Programmable Logic Controllers (PLC). A PLC program consists of inputs (whose values are given at runtime by factory sensors), outputs (whose values are given at runtime to factory actuators), and the logical expressions computing output v...
Contexts in source publication
Context 1
... label is propagated during the WP calculus, appears in the verification condition sent to the automated solver and comes back in the counter-example the solver gives when it finds one. The error reason is encoded in the Why3 instructions library as shown in figure 2. It is attached, with a "expl:" label, to pre-conditions of Ladder instructions, and is propagated during the whole process, like code locations labels. ...
Context 2
... label is propagated during the WP calculus, appears in the verification condition sent to the automated solver and comes back in the counter-example the solver gives when it finds one. The error reason is encoded in the Why3 instructions library as shown in figure 2. It is attached, with a "expl:" label, to pre-conditions of Ladder instructions, and is propagated during the whole process, like code locations labels. ...
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