#1110 Add more CIF explorer tests.

cif/org.eclipse.escet.cif.tests/tests/explorer/no_initial_complex_init.cif

+//////////////////////////////////////////////////////////////////////////////
+// Copyright (c) 2025 Contributors to the Eclipse Foundation
+//
+// See the NOTICE file(s) distributed with this work for additional
+// information regarding copyright ownership.
+//
+// This program and the accompanying materials are made available
+// under the terms of the MIT License which is available at
+// https://opensource.org/licenses/MIT
+//
+// SPDX-License-Identifier: MIT
+//////////////////////////////////////////////////////////////////////////////
+
+automaton a:
+  disc int x in any;
+  invariant x >= 0;
+  location:
+    initial;
+end
+
+automaton b:
+  disc bool x in any;
+  location:
+    initial x != x;
+end

cif/org.eclipse.escet.cif.tests/tests/explorer/no_initial_complex_init.run.err

+ERROR: CIF explorer failed due to unsatisfied preconditions:
+
+  ------------------------------------------------------------------------------------------------------------------------
+  (1/1) The specification has approximately 8.589934592e9 possible initial states, more than the maximum of 2,147,483,647.
+  ------------------------------------------------------------------------------------------------------------------------

cif/org.eclipse.escet.cif.tests/tests/explorer/no_initial_var_many_aut_none.aut.cif

+automaton statespace:
+  alphabet;
+  location;
+end

cif/org.eclipse.escet.cif.tests/tests/explorer/no_initial_var_many_aut_none.cif

+//////////////////////////////////////////////////////////////////////////////
+// Copyright (c) 2025 Contributors to the Eclipse Foundation
+//
+// See the NOTICE file(s) distributed with this work for additional
+// information regarding copyright ownership.
+//
+// This program and the accompanying materials are made available
+// under the terms of the MIT License which is available at
+// https://opensource.org/licenses/MIT
+//
+// SPDX-License-Identifier: MIT
+//////////////////////////////////////////////////////////////////////////////
+
+automaton a:
+  disc int x in any;
+  invariant x >= 0;
+  location:
+    initial;
+end
+
+automaton b:
+  location:
+    initial false;
+end

cif/org.eclipse.escet.cif.tests/tests/explorer/no_initial_var_many_aut_none.report.txt

+No initial state found.

cif/org.eclipse.escet.cif.tests/tests/explorer/no_initial_var_many_aut_none.run.err

+WARNING: File "explorer/no_initial_var_many_aut_none.cif": Semantic warning at line 21, column 11: Automaton "b" has no initial location.