geolog-zeta-fork/examples/geolog/petri_trace_full_vision.geolog

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2026-02-26 11:50:51 +01:00
// Trace theory with wires and disjunctions
// Testing the full vision from 2025-12-12
theory PetriNet {
P : Sort;
T : Sort;
in : Sort;
out : Sort;
in/src : in -> P;
in/tgt : in -> T;
out/src : out -> T;
out/tgt : out -> P;
}
theory (N : PetriNet instance) Trace {
F : Sort;
F/of : F -> N/T;
W : Sort;
W/src : W -> [firing : F, arc : N/out];
W/tgt : W -> [firing : F, arc : N/in];
input_terminal : Sort;
output_terminal : Sort;
input_terminal/of : input_terminal -> N/P;
output_terminal/of : output_terminal -> N/P;
input_terminal/tgt : input_terminal -> [firing : F, arc : N/in];
output_terminal/src : output_terminal -> [firing : F, arc : N/out];
// Every out arc of every firing: either wired or terminal
ax5 : forall f : F, arc : N/out. |-
(exists w : W. w W/src = [firing: f, arc: arc]) \/
(exists o : output_terminal. o output_terminal/src = [firing: f, arc: arc]);
// Every in arc of every firing: either wired or terminal
ax6 : forall f : F, arc : N/in. |-
(exists w : W. w W/tgt = [firing: f, arc: arc]) \/
(exists i : input_terminal. i input_terminal/tgt = [firing: f, arc: arc]);
}
instance SimpleNet : PetriNet = {
A : P;
B : P;
t : T;
arc_in : in;
arc_in in/src = A;
arc_in in/tgt = t;
arc_out : out;
arc_out out/src = t;
arc_out out/tgt = B;
}
// Chase should create both wires AND terminals (naive chase adds all disjuncts)
instance trace_test : SimpleNet Trace = chase {
f1 : F;
f1 F/of = SimpleNet/t;
}