// e6 e10
//
// Theses tests walk through exactly the configurations and sets of `D` that
- // UDPOR should encounter as it walks the unfolding.
+ // UDPOR COULD encounter as it walks through the unfolding. Note that
+ // if there are multiple alternatives to any given configuration, UDPOR can
+ // continue searching any one of them. The sequence assumes UDPOR first picks `e1`,
+ // then `e4`, and then `e7`
Unfolding U;
auto e0 = std::make_unique<UnfoldingEvent>(EventSet(), std::make_shared<ConditionallyDependentAction>());
auto e2_handle = e2.get();
auto e3 = std::make_unique<UnfoldingEvent>(EventSet({e1_handle}), std::make_shared<ConditionallyDependentAction>());
- // auto e3_handle = e3.get();
+ auto e3_handle = e3.get();
auto e4 = std::make_unique<UnfoldingEvent>(EventSet({e0_handle}), std::make_shared<ConditionallyDependentAction>());
auto e4_handle = e4.get();
auto e5_handle = e5.get();
auto e6 = std::make_unique<UnfoldingEvent>(EventSet({e5_handle}), std::make_shared<ConditionallyDependentAction>());
+ auto e6_handle = e6.get();
auto e7 = std::make_unique<UnfoldingEvent>(EventSet({e0_handle}), std::make_shared<ConditionallyDependentAction>());
auto e7_handle = e7.get();
auto e8 = std::make_unique<UnfoldingEvent>(EventSet({e4_handle, e7_handle}), std::make_shared<DependentAction>());
+ auto e8_handle = e8.get();
- auto e9 = std::make_unique<UnfoldingEvent>(EventSet({e7_handle}), std::make_shared<ConditionallyDependentAction>());
+ auto e9 = std::make_unique<UnfoldingEvent>(EventSet({e7_handle}), std::make_shared<DependentAction>());
auto e9_handle = e9.get();
auto e10 = std::make_unique<UnfoldingEvent>(EventSet({e9_handle}), std::make_shared<ConditionallyDependentAction>());
+ auto e10_handle = e10.get();
- SECTION("Alternative computation step 1")
+ SECTION("Alternative computation call 1")
{
- const EventSet D;
+ // During the first call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // /
+ // / /
+ // e2 e3
+ //
+ // C := {e0, e1, e2} and `Explore(C, D, A)` picked `e3`
+ // (since en(C') where C' := {e0, e1, e2, e3} is empty
+ // [so UDPOR will simply return when C' is reached])
+ //
+ // Thus the computation is (since D is empty at first)
+ //
+ // Alt(C, D + {e}) --> Alt({e0, e1, e2}, {e3})
+ //
+ // where U is given above. There are no alternatives in
+ // this case since `e4` and `e7` conflict with `e1` (so
+ // they cannot be added to C to form a configuration)
const Configuration C{e0_handle, e1_handle, e2_handle};
+ const EventSet D_plus_e{e3_handle};
REQUIRE(U.empty());
U.insert(std::move(e0));
U.insert(std::move(e4));
U.insert(std::move(e7));
- const auto alternative = C.compute_alternative_to(D, U);
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
REQUIRE_FALSE(alternative.has_value());
}
- SECTION("Alternative computation step 2")
+ SECTION("Alternative computation call 2")
{
- const EventSet D{e1_handle};
+ // During the second call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // /
+ // / /
+ // e2 e3
+ //
+ // C := {e0, e1} and `Explore(C, D, A)` picked `e2`.
+ //
+ // Thus the computation is (since D is still empty)
+ //
+ // Alt(C, D + {e}) --> Alt({e0, e1}, {e2})
+ //
+ // where U is given above. There are no alternatives in
+ // this case since `e4` and `e7` conflict with `e1` (so
+ // they cannot be added to C to form a configuration) and
+ // e3 is NOT in conflict with either e0 or e1
+ const Configuration C{e0_handle, e1_handle};
+ const EventSet D_plus_e{e2_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e7));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation call 3")
+ {
+ // During the thrid call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // /
+ // / /
+ // e2 e3
+ //
+ // C := {e0} and `Explore(C, D, A)` picked `e1`.
+ //
+ // Thus the computation is (since D is still empty)
+ //
+ // Alt(C, D + {e}) --> Alt({e0}, {e1})
+ //
+ // where U is given above. There are two alternatives in this case:
+ // {e0, e4} and {e0, e7}. Either one would be a valid choice for
+ // UDPOR, so we must check for the precense of either
const Configuration C{e0_handle};
+ const EventSet D_plus_e{e1_handle};
REQUIRE(U.empty());
U.insert(std::move(e0));
U.insert(std::move(e4));
U.insert(std::move(e7));
- const auto alternative = C.compute_alternative_to(D, U);
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
REQUIRE(alternative.has_value());
// The first alternative that is found is the one that is chosen. Since
REQUIRE((alternative.value().get_events() == EventSet({e0_handle, e4_handle}) or
alternative.value().get_events() == EventSet({e0_handle, e7_handle})));
}
+
+ SECTION("Alternative computation call 4")
+ {
+ // During the fourth call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / //
+ // / / e5 e8
+ // e2 e3 /
+ // e6
+ //
+ // C := {e0, e4, e5} and `Explore(C, D, A)` picked `e6`
+ // (since en(C') where C' := {e0, e4, e5, e6} is empty
+ // [so UDPOR will simply return when C' is reached])
+ //
+ // Thus the computation is (since D is {e1})
+ //
+ // Alt(C, D + {e}) --> Alt({e0, e4, e5}, {e1, e6})
+ //
+ // where U is given above. There are no alternatives in this
+ // case, since:
+ //
+ // 1.`e2/e3` are eliminated since their histories contain `e1`
+ // 2. `e7/e8` are eliminated because they conflict with `e5`
+ const Configuration C{e0_handle, e4_handle, e5_handle};
+ const EventSet D_plus_e{e1_handle, e6_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation call 5")
+ {
+ // During the fifth call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / //
+ // / / e5 e8
+ // e2 e3 /
+ // e6
+ //
+ // C := {e0, e4} and `Explore(C, D, A)` picked `e5`
+ // (since en(C') where C' := {e0, e4, e5, e6} is empty
+ // [so UDPOR will simply return when C' is reached])
+ //
+ // Thus the computation is (since D is {e1})
+ //
+ // Alt(C, D + {e}) --> Alt({e0, e4}, {e1, e5})
+ //
+ // where U is given above. There are THREE alternatives in this case,
+ // viz. {e0, e7}, {e0, e4, e7} and {e0, e4, e7, e8}.
+ //
+ // To continue the search, UDPOR computes J / C which in this
+ // case gives {e7, e8}. Since `e8` is not in en(C), UDPOR will
+ // choose `e7` next and add `e5` to `D`
+ const Configuration C{e0_handle, e4_handle};
+ const EventSet D_plus_e{e1_handle, e5_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ REQUIRE(U.size() == 8);
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE(alternative.has_value());
+ REQUIRE((alternative.value().get_events() == EventSet({e0_handle, e7_handle}) or
+ alternative.value().get_events() == EventSet({e0_handle, e4_handle, e7_handle}) or
+ alternative.value().get_events() == EventSet({e0_handle, e4_handle, e7_handle, e8_handle})));
+ }
+
+ SECTION("Alternative computation call 6")
+ {
+ // During the sixth call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / // /
+ // / / e5 e8 e9
+ // e2 e3 /
+ // e6
+ //
+ // C := {e0, e4, e7} and `Explore(C, D, A)` picked `e8`
+ // (since en(C') where C' := {e0, e4, e7, e8} is empty
+ // [so UDPOR will simply return when C' is reached])
+ //
+ // Thus the computation is (since D is {e1, e5} [see the last step])
+ //
+ // Alt(C, D + {e}) --> Alt({e0, e4, e7}, {e1, e5, e8})
+ //
+ // where U is given above. There are no alternatives in this case
+ // since all `e9` conflicts with `e4` and all other events of `U`
+ // are eliminated since their history intersects `D`
+ const Configuration C{e0_handle, e4_handle, e7_handle};
+ const EventSet D_plus_e{e1_handle, e5_handle, e8_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation call 7")
+ {
+ // During the seventh call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / // /
+ // / / e5 e8 e9
+ // e2 e3 /
+ // e6
+ //
+ // C := {e0, e4} and `Explore(C, D, A)` picked `e7`
+ //
+ // Thus the computation is (since D is {e1, e5} [see call 5])
+ //
+ // Alt(C, D + {e}) --> Alt({e0, e4}, {e1, e5, e7})
+ //
+ // where U is given above. There are no alternatives again in this case
+ // since all `e9` conflicts with `e4` and all other events of `U`
+ // are eliminated since their history intersects `D`
+ const Configuration C{e0_handle, e4_handle};
+ const EventSet D_plus_e{e1_handle, e5_handle, e7_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation call 8")
+ {
+ // During the eigth call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / // /
+ // / / e5 e8 e9
+ // e2 e3 /
+ // e6
+ //
+ // C := {e0} and `Explore(C, D, A)` picked `e4`. At this
+ // point, UDPOR finished its recursive search of {e0, e4}
+ // after having finished {e0, e1} prior.
+ //
+ // Thus the computation is (since D = {e1})
+ //
+ // Alt(C, D + {e}) --> Alt({e0}, {e1, e4})
+ //
+ // where U is given above. There is one alternative in this
+ // case, viz {e0, e7, e9} since
+ // 1. e9 conflicts with e4 in D
+ // 2. e7 conflicts with e1 in D
+ // 3. the set {e7, e9} is conflict-free since `e7 < e9`
+ // 4. all other events are eliminated since their histories
+ // intersect D
+ //
+ // UDPOR will continue its recursive search following `e7`
+ // and add `e4` to D
+ const Configuration C{e0_handle};
+ const EventSet D_plus_e{e1_handle, e4_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE(alternative.has_value());
+ REQUIRE(alternative.value().get_events() == EventSet({e0_handle, e7_handle, e9_handle}));
+ }
+
+ SECTION("Alternative computation call 9")
+ {
+ // During the ninth call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / // /
+ // / / e5 e8 e9
+ // e2 e3 / /
+ // e6 e10
+ //
+ // C := {e0, e7, e9} and `Explore(C, D, A)` picked `e10`.
+ // (since en(C') where C' := {e0, e7, e9, e10} is empty
+ // [so UDPOR will simply return when C' is reached]).
+ //
+ // Thus the computation is (since D = {e1, e4} [see the previous step])
+ //
+ // Alt(C, D + {e}) --> Alt({e0}, {e1, e4, e10})
+ //
+ // where U is given above. There are no alternatives in this case
+ const Configuration C{e0_handle, e7_handle, e9_handle};
+ const EventSet D_plus_e{e1_handle, e4_handle, e10_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+ U.insert(std::move(e10));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation call 10")
+ {
+ // During the tenth call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / // /
+ // / / e5 e8 e9
+ // e2 e3 / /
+ // e6 e10
+ //
+ // C := {e0, e7} and `Explore(C, D, A)` picked `e9`.
+ //
+ // Thus the computation is (since D = {e1, e4} [see call 8])
+ //
+ // Alt(C, D + {e}) --> Alt({e0}, {e1, e4, e9})
+ //
+ // where U is given above. There are no alternatives in this case
+ const Configuration C{e0_handle, e7_handle};
+ const EventSet D_plus_e{e1_handle, e4_handle, e9_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+ U.insert(std::move(e10));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation call 11 (final call)")
+ {
+ // During the eleventh and final call to Alt(C, D + {e}),
+ // UDPOR believes `U` to be the following:
+ //
+ // e0
+ // / / /
+ // e1 e4 e7
+ // / / // /
+ // / / e5 e8 e9
+ // e2 e3 / /
+ // e6 e10
+ //
+ // C := {e0} and `Explore(C, D, A)` picked `e7`.
+ //
+ // Thus the computation is (since D = {e1, e4} [see call 8])
+ //
+ // Alt(C, D + {e}) --> Alt({e0}, {e1, e4, e7})
+ //
+ // where U is given above. There are no alternatives in this case:
+ // everyone is eliminated!
+ const Configuration C{e0_handle, e7_handle};
+ const EventSet D_plus_e{e1_handle, e4_handle, e9_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+ U.insert(std::move(e10));
+
+ const auto alternative = C.compute_alternative_to(D_plus_e, U);
+ REQUIRE_FALSE(alternative.has_value());
+ }
+
+ SECTION("Alternative computation next")
+ {
+ SECTION("Followed {e0, e7} first")
+ {
+ const EventSet D{e1_handle, e7_handle};
+ const Configuration C{e0_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e5));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+ U.insert(std::move(e10));
+
+ const auto alternative = C.compute_alternative_to(D, U);
+ REQUIRE(alternative.has_value());
+
+ // In this case, only {e0, e4} is a valid alternative
+ REQUIRE(alternative.value().get_events() == EventSet({e0_handle, e4_handle, e5_handle}));
+ }
+
+ SECTION("Followed {e0, e4} first")
+ {
+ const EventSet D{e1_handle, e4_handle};
+ const Configuration C{e0_handle};
+
+ REQUIRE(U.empty());
+ U.insert(std::move(e0));
+ U.insert(std::move(e1));
+ U.insert(std::move(e2));
+ U.insert(std::move(e3));
+ U.insert(std::move(e4));
+ U.insert(std::move(e5));
+ U.insert(std::move(e6));
+ U.insert(std::move(e7));
+ U.insert(std::move(e8));
+ U.insert(std::move(e9));
+
+ const auto alternative = C.compute_alternative_to(D, U);
+ REQUIRE(alternative.has_value());
+
+ // In this case, only {e0, e7} is a valid alternative
+ REQUIRE(alternative.value().get_events() == EventSet({e0_handle, e7_handle, e9_handle}));
+ }
+ }
}
\ No newline at end of file
