/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -tc ../../../trunk/examples/toolchains/BuchiAutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.ample-buchi-a4216cd-m [2025-04-26 16:10:38,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-26 16:10:38,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2025-04-26 16:10:38,919 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-26 16:10:38,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-26 16:10:38,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-26 16:10:38,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-26 16:10:38,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-26 16:10:38,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-26 16:10:38,943 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-26 16:10:38,943 INFO L153 SettingsManager]: * Use SBE=true [2025-04-26 16:10:38,943 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2025-04-26 16:10:38,943 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Use old map elimination=false [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2025-04-26 16:10:38,944 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-26 16:10:38,944 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2025-04-26 16:10:38,945 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-26 16:10:38,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-26 16:10:38,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-26 16:10:38,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-26 16:10:38,945 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-26 16:10:38,945 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2025-04-26 16:10:38,945 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR [2025-04-26 16:10:39,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-26 16:10:39,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-26 16:10:39,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-26 16:10:39,165 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-26 16:10:39,165 INFO L274 PluginConnector]: CDTParser initialized [2025-04-26 16:10:39,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2025-04-26 16:10:40,425 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/85611f99f/a4b03e31b44d4aa4b283f9a9b9a5ef7f/FLAG84a3e7074 [2025-04-26 16:10:40,627 INFO L389 CDTParser]: Found 1 translation units. [2025-04-26 16:10:40,628 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2025-04-26 16:10:40,633 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/85611f99f/a4b03e31b44d4aa4b283f9a9b9a5ef7f/FLAG84a3e7074 [2025-04-26 16:10:41,475 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/85611f99f/a4b03e31b44d4aa4b283f9a9b9a5ef7f [2025-04-26 16:10:41,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-26 16:10:41,478 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-26 16:10:41,479 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-26 16:10:41,479 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-26 16:10:41,482 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-26 16:10:41,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28508314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41, skipping insertion in model container [2025-04-26 16:10:41,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,496 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-26 16:10:41,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-26 16:10:41,704 INFO L200 MainTranslator]: Completed pre-run [2025-04-26 16:10:41,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-26 16:10:41,759 INFO L204 MainTranslator]: Completed translation [2025-04-26 16:10:41,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41 WrapperNode [2025-04-26 16:10:41,759 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-26 16:10:41,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-26 16:10:41,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-26 16:10:41,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-26 16:10:41,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,803 INFO L138 Inliner]: procedures = 28, calls = 59, calls flagged for inlining = 23, calls inlined = 33, statements flattened = 353 [2025-04-26 16:10:41,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-26 16:10:41,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-26 16:10:41,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-26 16:10:41,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-26 16:10:41,810 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,814 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,821 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,828 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-26 16:10:41,839 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-26 16:10:41,839 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-26 16:10:41,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-26 16:10:41,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (1/1) ... [2025-04-26 16:10:41,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2025-04-26 16:10:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-26 16:10:41,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2025-04-26 16:10:41,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2025-04-26 16:10:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-26 16:10:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-04-26 16:10:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-04-26 16:10:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-26 16:10:41,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-26 16:10:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-26 16:10:41,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-26 16:10:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-26 16:10:41,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-26 16:10:41,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2025-04-26 16:10:41,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2025-04-26 16:10:41,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-26 16:10:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-26 16:10:41,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-26 16:10:41,885 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-26 16:10:41,976 INFO L234 CfgBuilder]: Building ICFG [2025-04-26 16:10:41,977 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-26 16:10:42,361 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-26 16:10:42,361 INFO L283 CfgBuilder]: Performing block encoding [2025-04-26 16:10:42,545 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-26 16:10:42,546 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2025-04-26 16:10:42,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:10:42 BoogieIcfgContainer [2025-04-26 16:10:42,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-26 16:10:42,547 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2025-04-26 16:10:42,547 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2025-04-26 16:10:42,552 INFO L274 PluginConnector]: BuchiAutomizer initialized [2025-04-26 16:10:42,553 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:10:42,553 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.04 04:10:41" (1/3) ... [2025-04-26 16:10:42,553 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4ea01f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:10:42, skipping insertion in model container [2025-04-26 16:10:42,553 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:10:42,554 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.04 04:10:41" (2/3) ... [2025-04-26 16:10:42,554 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4ea01f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.04 04:10:42, skipping insertion in model container [2025-04-26 16:10:42,554 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2025-04-26 16:10:42,554 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.04 04:10:42" (3/3) ... [2025-04-26 16:10:42,555 INFO L376 chiAutomizerObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2025-04-26 16:10:42,637 INFO L143 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2025-04-26 16:10:42,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 291 transitions, 648 flow [2025-04-26 16:10:42,743 INFO L116 PetriNetUnfolderBase]: 20/253 cut-off events. [2025-04-26 16:10:42,744 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-26 16:10:42,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 253 events. 20/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 304 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 221. Up to 3 conditions per place. [2025-04-26 16:10:42,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 291 transitions, 648 flow [2025-04-26 16:10:42,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 253 transitions, 554 flow [2025-04-26 16:10:42,760 INFO L84 lAbstractionProvider]: Constructed initial Petri net abstraction that has has 252 places, 253 transitions, 554 flow [2025-04-26 16:10:42,769 INFO L306 stractBuchiCegarLoop]: Interprodecural is true [2025-04-26 16:10:42,769 INFO L307 stractBuchiCegarLoop]: Hoare is None [2025-04-26 16:10:42,769 INFO L308 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2025-04-26 16:10:42,769 INFO L309 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2025-04-26 16:10:42,769 INFO L310 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2025-04-26 16:10:42,770 INFO L311 stractBuchiCegarLoop]: Difference is false [2025-04-26 16:10:42,770 INFO L312 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2025-04-26 16:10:42,770 INFO L316 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2025-04-26 16:10:42,771 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2025-04-26 16:11:29,805 INFO L131 ngComponentsAnalysis]: Automaton has 35801 accepting balls. 582457 [2025-04-26 16:11:29,806 INFO L88 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2025-04-26 16:11:29,806 INFO L120 BuchiIsEmpty]: Starting construction of run [2025-04-26 16:11:29,831 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:11:29,831 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-26 16:11:29,831 INFO L340 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2025-04-26 16:11:29,832 INFO L73 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 632627 states, but on-demand construction may add more states