./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe028_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i ./goblint.2024-06-19_11-23-25.files/protection/safe028_power.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:07:35,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:07:35,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:07:35,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:07:35,698 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:07:35,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:07:35,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:07:35,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:07:35,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:07:35,722 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:07:35,722 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:07:35,723 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:07:35,723 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:07:35,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:07:35,724 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:07:35,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:07:35,725 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:07:35,725 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:07:35,725 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:07:35,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:07:35,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:07:35,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:07:35,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:07:35,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:07:35,727 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:07:35,728 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:07:35,728 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:07:35,728 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:07:35,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:07:35,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:07:35,729 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:07:35,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:07:35,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:07:35,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:07:35,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:07:35,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:07:35,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:07:35,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:07:35,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:07:35,732 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:07:35,732 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:07:35,748 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:07:35,748 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:07:35,748 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 19:07:36,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:07:36,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:07:36,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:07:36,044 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:07:36,044 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:07:36,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe028_power.yml/witness.yml [2024-06-27 19:07:36,260 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:07:36,261 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:07:36,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-27 19:07:37,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:07:37,721 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:07:37,721 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-27 19:07:37,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249d2b69f/278c13be98494e2abe97a42931f78513/FLAG0f314459f [2024-06-27 19:07:37,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249d2b69f/278c13be98494e2abe97a42931f78513 [2024-06-27 19:07:37,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:07:37,754 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:07:37,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:07:37,755 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:07:37,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:07:37,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:07:36" (1/2) ... [2024-06-27 19:07:37,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3e6948 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:07:37, skipping insertion in model container [2024-06-27 19:07:37,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:07:36" (1/2) ... [2024-06-27 19:07:37,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38e61ae9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:07:37, skipping insertion in model container [2024-06-27 19:07:37,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:07:37" (2/2) ... [2024-06-27 19:07:37,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3e6948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:37, skipping insertion in model container [2024-06-27 19:07:37,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:07:37" (2/2) ... [2024-06-27 19:07:37,763 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:07:37,913 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:07:37,915 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 19:07:37,915 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 19:07:37,916 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 19:07:37,916 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:07:37,916 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-27 19:07:37,968 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:07:38,160 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_power.i[990,1003] [2024-06-27 19:07:38,375 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:07:38,385 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 19:07:38,423 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_power.i[990,1003] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:07:38,557 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:07:38,612 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:07:38,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38 WrapperNode [2024-06-27 19:07:38,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:07:38,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:07:38,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:07:38,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:07:38,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,674 INFO L138 Inliner]: procedures = 175, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 211 [2024-06-27 19:07:38,688 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:07:38,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:07:38,689 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:07:38,689 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:07:38,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,705 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,744 INFO L175 MemorySlicer]: Split 36 memory accesses to 2 slices as follows [2, 34]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 19:07:38,745 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,764 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,797 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:07:38,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:07:38,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:07:38,800 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:07:38,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (1/1) ... [2024-06-27 19:07:38,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:07:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:07:38,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:07:38,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:07:38,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 19:07:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 19:07:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 19:07:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 19:07:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:07:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:07:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:07:38,876 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:07:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:07:38,876 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:07:38,877 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:07:38,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:07:38,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:07:38,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 19:07:38,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:07:38,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:07:38,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:07:38,880 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:07:39,055 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:07:39,079 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:07:39,500 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:07:39,501 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:07:39,898 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:07:39,899 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:07:39,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:07:39 BoogieIcfgContainer [2024-06-27 19:07:39,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:07:39,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:07:39,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:07:39,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:07:39,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:07:36" (1/4) ... [2024-06-27 19:07:39,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185199cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:07:39, skipping insertion in model container [2024-06-27 19:07:39,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:07:37" (2/4) ... [2024-06-27 19:07:39,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185199cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:07:39, skipping insertion in model container [2024-06-27 19:07:39,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:07:38" (3/4) ... [2024-06-27 19:07:39,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185199cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:07:39, skipping insertion in model container [2024-06-27 19:07:39,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:07:39" (4/4) ... [2024-06-27 19:07:39,909 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_power.i [2024-06-27 19:07:39,925 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:07:39,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 19:07:39,926 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:07:40,000 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:07:40,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 19:07:40,072 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-27 19:07:40,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:07:40,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-27 19:07:40,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 19:07:40,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 99 flow [2024-06-27 19:07:40,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:07:40,093 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57b98d41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:07:40,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 19:07:40,097 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:07:40,097 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:07:40,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:07:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:07:40,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:40,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 801969894, now seen corresponding path program 1 times [2024-06-27 19:07:40,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:40,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644420430] [2024-06-27 19:07:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:41,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:41,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644420430] [2024-06-27 19:07:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644420430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:41,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:41,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:07:41,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995748269] [2024-06-27 19:07:41,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:41,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:07:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:07:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:07:41,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 19:07:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:41,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:41,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 19:07:41,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:43,196 INFO L124 PetriNetUnfolderBase]: 3758/6093 cut-off events. [2024-06-27 19:07:43,196 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 19:07:43,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11601 conditions, 6093 events. 3758/6093 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 38051 event pairs, 2474 based on Foata normal form. 150/5636 useless extension candidates. Maximal degree in co-relation 11589. Up to 5417 conditions per place. [2024-06-27 19:07:43,240 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 46 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2024-06-27 19:07:43,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 243 flow [2024-06-27 19:07:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:07:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:07:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 19:07:43,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-06-27 19:07:43,254 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 99 flow. Second operand 3 states and 95 transitions. [2024-06-27 19:07:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 243 flow [2024-06-27 19:07:43,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 238 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:07:43,259 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 138 flow [2024-06-27 19:07:43,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 19:07:43,264 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-06-27 19:07:43,265 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 138 flow [2024-06-27 19:07:43,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:43,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:07:43,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:43,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1894055871, now seen corresponding path program 1 times [2024-06-27 19:07:43,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:43,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028489885] [2024-06-27 19:07:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:44,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:44,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028489885] [2024-06-27 19:07:44,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028489885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:44,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:07:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956232346] [2024-06-27 19:07:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:07:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:07:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:07:44,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:07:44,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:44,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:44,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:07:44,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:46,344 INFO L124 PetriNetUnfolderBase]: 4502/7041 cut-off events. [2024-06-27 19:07:46,344 INFO L125 PetriNetUnfolderBase]: For 986/986 co-relation queries the response was YES. [2024-06-27 19:07:46,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15341 conditions, 7041 events. 4502/7041 cut-off events. For 986/986 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 43218 event pairs, 2014 based on Foata normal form. 6/6547 useless extension candidates. Maximal degree in co-relation 15329. Up to 6401 conditions per place. [2024-06-27 19:07:46,391 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 61 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 19:07:46,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 362 flow [2024-06-27 19:07:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:07:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:07:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-27 19:07:46,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-27 19:07:46,400 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 138 flow. Second operand 4 states and 123 transitions. [2024-06-27 19:07:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 362 flow [2024-06-27 19:07:46,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:07:46,405 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 194 flow [2024-06-27 19:07:46,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-27 19:07:46,409 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-27 19:07:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 194 flow [2024-06-27 19:07:46,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:46,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:46,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:46,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:07:46,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:46,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash -981924478, now seen corresponding path program 1 times [2024-06-27 19:07:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:46,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545797550] [2024-06-27 19:07:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:46,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:46,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545797550] [2024-06-27 19:07:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545797550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:46,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:46,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:07:46,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302044549] [2024-06-27 19:07:46,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:46,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:07:46,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:07:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:07:46,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-06-27 19:07:46,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:46,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:46,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-06-27 19:07:46,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:47,273 INFO L124 PetriNetUnfolderBase]: 1682/3019 cut-off events. [2024-06-27 19:07:47,274 INFO L125 PetriNetUnfolderBase]: For 1252/1273 co-relation queries the response was YES. [2024-06-27 19:07:47,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 3019 events. 1682/3019 cut-off events. For 1252/1273 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 19438 event pairs, 704 based on Foata normal form. 18/2942 useless extension candidates. Maximal degree in co-relation 6849. Up to 2005 conditions per place. [2024-06-27 19:07:47,296 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 50 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-06-27 19:07:47,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 339 flow [2024-06-27 19:07:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:07:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:07:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-27 19:07:47,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-27 19:07:47,299 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 194 flow. Second operand 3 states and 100 transitions. [2024-06-27 19:07:47,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 339 flow [2024-06-27 19:07:47,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 320 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:07:47,302 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 164 flow [2024-06-27 19:07:47,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 19:07:47,303 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-27 19:07:47,303 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 164 flow [2024-06-27 19:07:47,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:47,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:47,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:07:47,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:47,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1258279177, now seen corresponding path program 1 times [2024-06-27 19:07:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:47,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630716196] [2024-06-27 19:07:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:50,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630716196] [2024-06-27 19:07:50,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630716196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:50,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:50,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:07:50,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136872449] [2024-06-27 19:07:50,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:50,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:07:50,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:07:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:07:50,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:07:50,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:50,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:50,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:07:50,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:51,602 INFO L124 PetriNetUnfolderBase]: 3694/5812 cut-off events. [2024-06-27 19:07:51,602 INFO L125 PetriNetUnfolderBase]: For 3260/3260 co-relation queries the response was YES. [2024-06-27 19:07:51,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13893 conditions, 5812 events. 3694/5812 cut-off events. For 3260/3260 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 34618 event pairs, 1299 based on Foata normal form. 6/5667 useless extension candidates. Maximal degree in co-relation 13879. Up to 5208 conditions per place. [2024-06-27 19:07:51,634 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 80 selfloop transitions, 16 changer transitions 1/106 dead transitions. [2024-06-27 19:07:51,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 106 transitions, 500 flow [2024-06-27 19:07:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:07:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:07:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 19:07:51,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-27 19:07:51,636 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 164 flow. Second operand 6 states and 172 transitions. [2024-06-27 19:07:51,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 106 transitions, 500 flow [2024-06-27 19:07:51,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 106 transitions, 488 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 19:07:51,640 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 233 flow [2024-06-27 19:07:51,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 19:07:51,642 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-06-27 19:07:51,642 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 233 flow [2024-06-27 19:07:51,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:51,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:51,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:51,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:07:51,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:51,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1262036746, now seen corresponding path program 1 times [2024-06-27 19:07:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:51,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703086907] [2024-06-27 19:07:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:51,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:53,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:53,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703086907] [2024-06-27 19:07:53,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703086907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:53,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:53,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:07:53,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891167468] [2024-06-27 19:07:53,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:53,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:07:53,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:07:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:07:53,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:07:53,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:53,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:53,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:07:53,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:54,292 INFO L124 PetriNetUnfolderBase]: 2767/4560 cut-off events. [2024-06-27 19:07:54,292 INFO L125 PetriNetUnfolderBase]: For 3678/3678 co-relation queries the response was YES. [2024-06-27 19:07:54,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 4560 events. 2767/4560 cut-off events. For 3678/3678 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27570 event pairs, 1193 based on Foata normal form. 2/4436 useless extension candidates. Maximal degree in co-relation 11625. Up to 3996 conditions per place. [2024-06-27 19:07:54,324 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 66 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 19:07:54,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 478 flow [2024-06-27 19:07:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:07:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:07:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 19:07:54,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 19:07:54,330 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 233 flow. Second operand 5 states and 123 transitions. [2024-06-27 19:07:54,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 478 flow [2024-06-27 19:07:54,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 434 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:07:54,335 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 284 flow [2024-06-27 19:07:54,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-27 19:07:54,336 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-06-27 19:07:54,336 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 284 flow [2024-06-27 19:07:54,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:54,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:54,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:54,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:07:54,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:54,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash 468435427, now seen corresponding path program 1 times [2024-06-27 19:07:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:54,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14006501] [2024-06-27 19:07:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:54,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:56,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14006501] [2024-06-27 19:07:56,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14006501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:56,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:56,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:07:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225899561] [2024-06-27 19:07:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:07:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:07:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:07:56,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:07:56,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:56,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:56,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:07:56,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:57,560 INFO L124 PetriNetUnfolderBase]: 2765/4574 cut-off events. [2024-06-27 19:07:57,560 INFO L125 PetriNetUnfolderBase]: For 5411/5411 co-relation queries the response was YES. [2024-06-27 19:07:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12628 conditions, 4574 events. 2765/4574 cut-off events. For 5411/5411 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27702 event pairs, 1150 based on Foata normal form. 2/4450 useless extension candidates. Maximal degree in co-relation 12608. Up to 3974 conditions per place. [2024-06-27 19:07:57,584 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 75 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-27 19:07:57,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 98 transitions, 562 flow [2024-06-27 19:07:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:07:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:07:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:07:57,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-27 19:07:57,586 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 284 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:07:57,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 98 transitions, 562 flow [2024-06-27 19:07:57,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 538 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:07:57,592 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 333 flow [2024-06-27 19:07:57,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 19:07:57,593 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-27 19:07:57,593 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 333 flow [2024-06-27 19:07:57,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:57,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:57,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:57,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:07:57,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:07:57,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1584653771, now seen corresponding path program 1 times [2024-06-27 19:07:57,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:57,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208375625] [2024-06-27 19:07:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:57,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:59,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208375625] [2024-06-27 19:07:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208375625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:59,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:59,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:07:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561821961] [2024-06-27 19:07:59,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:07:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:07:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:07:59,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:59,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:59,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:59,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:59,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:00,327 INFO L124 PetriNetUnfolderBase]: 3377/5379 cut-off events. [2024-06-27 19:08:00,328 INFO L125 PetriNetUnfolderBase]: For 9206/9206 co-relation queries the response was YES. [2024-06-27 19:08:00,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16054 conditions, 5379 events. 3377/5379 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 31936 event pairs, 1358 based on Foata normal form. 4/5232 useless extension candidates. Maximal degree in co-relation 16032. Up to 4806 conditions per place. [2024-06-27 19:08:00,355 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 88 selfloop transitions, 14 changer transitions 0/110 dead transitions. [2024-06-27 19:08:00,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 670 flow [2024-06-27 19:08:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:08:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:08:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:08:00,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:08:00,358 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 333 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:08:00,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 670 flow [2024-06-27 19:08:00,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 627 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:00,365 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 399 flow [2024-06-27 19:08:00,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-06-27 19:08:00,366 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-27 19:08:00,366 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 399 flow [2024-06-27 19:08:00,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:00,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:00,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:00,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:08:00,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:00,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1636588425, now seen corresponding path program 2 times [2024-06-27 19:08:00,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:00,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013435959] [2024-06-27 19:08:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:02,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:02,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013435959] [2024-06-27 19:08:02,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013435959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:02,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:02,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:08:02,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299784106] [2024-06-27 19:08:02,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:02,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:08:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:08:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:08:02,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:02,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:02,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:02,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:02,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:03,004 INFO L124 PetriNetUnfolderBase]: 3401/5413 cut-off events. [2024-06-27 19:08:03,004 INFO L125 PetriNetUnfolderBase]: For 13001/13001 co-relation queries the response was YES. [2024-06-27 19:08:03,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17456 conditions, 5413 events. 3401/5413 cut-off events. For 13001/13001 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 32174 event pairs, 1326 based on Foata normal form. 4/5264 useless extension candidates. Maximal degree in co-relation 17432. Up to 4783 conditions per place. [2024-06-27 19:08:03,036 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 83 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-06-27 19:08:03,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 731 flow [2024-06-27 19:08:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:08:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:08:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:08:03,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:08:03,039 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 399 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:08:03,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 731 flow [2024-06-27 19:08:03,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 687 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 19:08:03,049 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 454 flow [2024-06-27 19:08:03,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-27 19:08:03,052 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2024-06-27 19:08:03,052 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 454 flow [2024-06-27 19:08:03,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:03,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:03,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:08:03,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:03,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1636598345, now seen corresponding path program 1 times [2024-06-27 19:08:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:03,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256170558] [2024-06-27 19:08:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256170558] [2024-06-27 19:08:05,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256170558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:05,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:05,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:05,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956762132] [2024-06-27 19:08:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:05,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:05,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:08:05,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:05,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:05,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:08:05,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:06,534 INFO L124 PetriNetUnfolderBase]: 2838/4704 cut-off events. [2024-06-27 19:08:06,534 INFO L125 PetriNetUnfolderBase]: For 14363/14363 co-relation queries the response was YES. [2024-06-27 19:08:06,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15963 conditions, 4704 events. 2838/4704 cut-off events. For 14363/14363 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28624 event pairs, 1044 based on Foata normal form. 4/4582 useless extension candidates. Maximal degree in co-relation 15938. Up to 4036 conditions per place. [2024-06-27 19:08:06,562 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 97 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2024-06-27 19:08:06,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 123 transitions, 824 flow [2024-06-27 19:08:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:08:06,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:08:06,565 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 454 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:08:06,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 123 transitions, 824 flow [2024-06-27 19:08:06,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 755 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:06,574 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 473 flow [2024-06-27 19:08:06,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=473, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-27 19:08:06,575 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-27 19:08:06,575 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 473 flow [2024-06-27 19:08:06,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:06,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:06,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:06,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:08:06,576 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:06,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1879628610, now seen corresponding path program 1 times [2024-06-27 19:08:06,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:06,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321837701] [2024-06-27 19:08:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:08,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:08,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321837701] [2024-06-27 19:08:08,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321837701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:08,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:08,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:08,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520392166] [2024-06-27 19:08:08,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:08,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:08,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:08,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:08,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:08,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:08,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 473 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:08,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:08,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:08,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:09,785 INFO L124 PetriNetUnfolderBase]: 3427/5466 cut-off events. [2024-06-27 19:08:09,786 INFO L125 PetriNetUnfolderBase]: For 20316/20316 co-relation queries the response was YES. [2024-06-27 19:08:09,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19238 conditions, 5466 events. 3427/5466 cut-off events. For 20316/20316 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 32463 event pairs, 1298 based on Foata normal form. 2/5317 useless extension candidates. Maximal degree in co-relation 19212. Up to 4869 conditions per place. [2024-06-27 19:08:09,824 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 101 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-27 19:08:09,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 136 transitions, 937 flow [2024-06-27 19:08:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:08:09,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 19:08:09,826 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 473 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:08:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 136 transitions, 937 flow [2024-06-27 19:08:09,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 136 transitions, 873 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:08:09,841 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 602 flow [2024-06-27 19:08:09,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2024-06-27 19:08:09,841 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-27 19:08:09,842 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 602 flow [2024-06-27 19:08:09,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:09,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:09,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:09,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:08:09,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:09,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:09,843 INFO L85 PathProgramCache]: Analyzing trace with hash -805067742, now seen corresponding path program 2 times [2024-06-27 19:08:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:09,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521758395] [2024-06-27 19:08:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:09,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:11,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521758395] [2024-06-27 19:08:11,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521758395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:11,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:11,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:11,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856689117] [2024-06-27 19:08:11,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:11,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:11,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:11,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:11,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:11,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:11,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 602 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:11,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:11,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:11,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:13,290 INFO L124 PetriNetUnfolderBase]: 3485/5540 cut-off events. [2024-06-27 19:08:13,290 INFO L125 PetriNetUnfolderBase]: For 26042/26042 co-relation queries the response was YES. [2024-06-27 19:08:13,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20908 conditions, 5540 events. 3485/5540 cut-off events. For 26042/26042 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 32907 event pairs, 1273 based on Foata normal form. 4/5391 useless extension candidates. Maximal degree in co-relation 20880. Up to 4791 conditions per place. [2024-06-27 19:08:13,329 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 110 selfloop transitions, 41 changer transitions 0/159 dead transitions. [2024-06-27 19:08:13,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 159 transitions, 1251 flow [2024-06-27 19:08:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:08:13,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:08:13,333 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 602 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:08:13,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 159 transitions, 1251 flow [2024-06-27 19:08:13,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 159 transitions, 1109 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:13,360 INFO L231 Difference]: Finished difference. Result has 83 places, 107 transitions, 760 flow [2024-06-27 19:08:13,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=760, PETRI_PLACES=83, PETRI_TRANSITIONS=107} [2024-06-27 19:08:13,361 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-27 19:08:13,361 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 107 transitions, 760 flow [2024-06-27 19:08:13,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:13,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:13,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:08:13,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:13,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -798864022, now seen corresponding path program 1 times [2024-06-27 19:08:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199854809] [2024-06-27 19:08:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:15,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199854809] [2024-06-27 19:08:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199854809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:15,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:15,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065549671] [2024-06-27 19:08:15,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:15,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:15,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:15,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:15,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 107 transitions, 760 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:15,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:15,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:15,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:16,813 INFO L124 PetriNetUnfolderBase]: 3561/5668 cut-off events. [2024-06-27 19:08:16,813 INFO L125 PetriNetUnfolderBase]: For 31565/31565 co-relation queries the response was YES. [2024-06-27 19:08:16,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22733 conditions, 5668 events. 3561/5668 cut-off events. For 31565/31565 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 33461 event pairs, 1312 based on Foata normal form. 2/5519 useless extension candidates. Maximal degree in co-relation 22703. Up to 5050 conditions per place. [2024-06-27 19:08:16,839 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 139 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-06-27 19:08:16,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 172 transitions, 1336 flow [2024-06-27 19:08:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:08:16,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:08:16,841 INFO L175 Difference]: Start difference. First operand has 83 places, 107 transitions, 760 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:08:16,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 172 transitions, 1336 flow [2024-06-27 19:08:16,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 172 transitions, 1255 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:16,864 INFO L231 Difference]: Finished difference. Result has 89 places, 122 transitions, 899 flow [2024-06-27 19:08:16,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=89, PETRI_TRANSITIONS=122} [2024-06-27 19:08:16,865 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-27 19:08:16,865 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 122 transitions, 899 flow [2024-06-27 19:08:16,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:16,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:16,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:16,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:08:16,866 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:16,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:16,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1341179000, now seen corresponding path program 2 times [2024-06-27 19:08:16,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:16,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142883424] [2024-06-27 19:08:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:16,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:18,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:18,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142883424] [2024-06-27 19:08:18,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142883424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:18,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:18,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694057583] [2024-06-27 19:08:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:18,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:18,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:18,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:18,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:18,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 122 transitions, 899 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:18,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:18,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:18,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:20,411 INFO L124 PetriNetUnfolderBase]: 3559/5664 cut-off events. [2024-06-27 19:08:20,412 INFO L125 PetriNetUnfolderBase]: For 37985/37985 co-relation queries the response was YES. [2024-06-27 19:08:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24078 conditions, 5664 events. 3559/5664 cut-off events. For 37985/37985 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 33475 event pairs, 1255 based on Foata normal form. 2/5515 useless extension candidates. Maximal degree in co-relation 24044. Up to 5004 conditions per place. [2024-06-27 19:08:20,447 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 136 selfloop transitions, 30 changer transitions 0/174 dead transitions. [2024-06-27 19:08:20,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 174 transitions, 1459 flow [2024-06-27 19:08:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:08:20,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:08:20,449 INFO L175 Difference]: Start difference. First operand has 89 places, 122 transitions, 899 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:08:20,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 174 transitions, 1459 flow [2024-06-27 19:08:20,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 174 transitions, 1365 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:20,488 INFO L231 Difference]: Finished difference. Result has 93 places, 130 transitions, 1005 flow [2024-06-27 19:08:20,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1005, PETRI_PLACES=93, PETRI_TRANSITIONS=130} [2024-06-27 19:08:20,489 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2024-06-27 19:08:20,489 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 130 transitions, 1005 flow [2024-06-27 19:08:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:20,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:20,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:08:20,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:20,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1861053238, now seen corresponding path program 1 times [2024-06-27 19:08:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:20,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163670820] [2024-06-27 19:08:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:22,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:22,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163670820] [2024-06-27 19:08:22,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163670820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:22,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:22,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:22,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342158679] [2024-06-27 19:08:22,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:22,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:22,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:22,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:22,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 130 transitions, 1005 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:22,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:22,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:24,350 INFO L124 PetriNetUnfolderBase]: 3601/5726 cut-off events. [2024-06-27 19:08:24,350 INFO L125 PetriNetUnfolderBase]: For 46498/46498 co-relation queries the response was YES. [2024-06-27 19:08:24,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25596 conditions, 5726 events. 3601/5726 cut-off events. For 46498/46498 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 33919 event pairs, 1239 based on Foata normal form. 4/5579 useless extension candidates. Maximal degree in co-relation 25560. Up to 5057 conditions per place. [2024-06-27 19:08:24,386 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 139 selfloop transitions, 37 changer transitions 0/184 dead transitions. [2024-06-27 19:08:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 184 transitions, 1577 flow [2024-06-27 19:08:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:08:24,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:08:24,389 INFO L175 Difference]: Start difference. First operand has 93 places, 130 transitions, 1005 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:08:24,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 184 transitions, 1577 flow [2024-06-27 19:08:24,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 184 transitions, 1447 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:24,434 INFO L231 Difference]: Finished difference. Result has 97 places, 133 transitions, 1028 flow [2024-06-27 19:08:24,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=97, PETRI_TRANSITIONS=133} [2024-06-27 19:08:24,435 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-27 19:08:24,435 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 133 transitions, 1028 flow [2024-06-27 19:08:24,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:24,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:24,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:24,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:08:24,436 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:24,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 812705770, now seen corresponding path program 2 times [2024-06-27 19:08:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:24,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592065301] [2024-06-27 19:08:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592065301] [2024-06-27 19:08:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592065301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:26,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:26,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:26,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294829874] [2024-06-27 19:08:26,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:26,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:26,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:26,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:26,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 133 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:26,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:26,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:26,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:27,983 INFO L124 PetriNetUnfolderBase]: 3672/5845 cut-off events. [2024-06-27 19:08:27,983 INFO L125 PetriNetUnfolderBase]: For 45374/45374 co-relation queries the response was YES. [2024-06-27 19:08:27,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25632 conditions, 5845 events. 3672/5845 cut-off events. For 45374/45374 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 34775 event pairs, 1218 based on Foata normal form. 4/5695 useless extension candidates. Maximal degree in co-relation 25595. Up to 5060 conditions per place. [2024-06-27 19:08:28,017 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 135 selfloop transitions, 66 changer transitions 0/209 dead transitions. [2024-06-27 19:08:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 209 transitions, 1925 flow [2024-06-27 19:08:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:08:28,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 19:08:28,019 INFO L175 Difference]: Start difference. First operand has 97 places, 133 transitions, 1028 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:08:28,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 209 transitions, 1925 flow [2024-06-27 19:08:28,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 209 transitions, 1808 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:28,055 INFO L231 Difference]: Finished difference. Result has 101 places, 159 transitions, 1453 flow [2024-06-27 19:08:28,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=101, PETRI_TRANSITIONS=159} [2024-06-27 19:08:28,055 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-27 19:08:28,055 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 159 transitions, 1453 flow [2024-06-27 19:08:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:28,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:28,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:28,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:08:28,056 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:28,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1502432620, now seen corresponding path program 3 times [2024-06-27 19:08:28,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:28,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135882871] [2024-06-27 19:08:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:28,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:30,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:30,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135882871] [2024-06-27 19:08:30,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135882871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965379955] [2024-06-27 19:08:30,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:30,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:30,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:30,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:30,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 159 transitions, 1453 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:30,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:30,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:30,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:31,949 INFO L124 PetriNetUnfolderBase]: 3955/6272 cut-off events. [2024-06-27 19:08:31,949 INFO L125 PetriNetUnfolderBase]: For 62947/62947 co-relation queries the response was YES. [2024-06-27 19:08:31,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30285 conditions, 6272 events. 3955/6272 cut-off events. For 62947/62947 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 37405 event pairs, 1156 based on Foata normal form. 4/6122 useless extension candidates. Maximal degree in co-relation 30245. Up to 4925 conditions per place. [2024-06-27 19:08:31,985 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 155 selfloop transitions, 68 changer transitions 0/231 dead transitions. [2024-06-27 19:08:31,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 231 transitions, 2439 flow [2024-06-27 19:08:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:08:31,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-27 19:08:31,988 INFO L175 Difference]: Start difference. First operand has 101 places, 159 transitions, 1453 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:08:31,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 231 transitions, 2439 flow [2024-06-27 19:08:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 231 transitions, 2191 flow, removed 115 selfloop flow, removed 2 redundant places. [2024-06-27 19:08:32,057 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 1606 flow [2024-06-27 19:08:32,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1606, PETRI_PLACES=108, PETRI_TRANSITIONS=171} [2024-06-27 19:08:32,057 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-27 19:08:32,058 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 1606 flow [2024-06-27 19:08:32,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:32,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:32,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:32,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:08:32,058 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:32,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1687669618, now seen corresponding path program 4 times [2024-06-27 19:08:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:32,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894289349] [2024-06-27 19:08:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:32,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:34,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894289349] [2024-06-27 19:08:34,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894289349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:34,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:34,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:34,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806537237] [2024-06-27 19:08:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:34,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:34,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:34,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:34,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:34,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 171 transitions, 1606 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:34,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:34,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:35,857 INFO L124 PetriNetUnfolderBase]: 4137/6542 cut-off events. [2024-06-27 19:08:35,857 INFO L125 PetriNetUnfolderBase]: For 77242/77242 co-relation queries the response was YES. [2024-06-27 19:08:35,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33296 conditions, 6542 events. 4137/6542 cut-off events. For 77242/77242 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 39184 event pairs, 1280 based on Foata normal form. 24/6412 useless extension candidates. Maximal degree in co-relation 33253. Up to 5529 conditions per place. [2024-06-27 19:08:35,895 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 178 selfloop transitions, 42 changer transitions 0/228 dead transitions. [2024-06-27 19:08:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 228 transitions, 2317 flow [2024-06-27 19:08:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:08:35,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:08:35,897 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 1606 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:08:35,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 228 transitions, 2317 flow [2024-06-27 19:08:35,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 228 transitions, 2185 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:35,969 INFO L231 Difference]: Finished difference. Result has 112 places, 173 transitions, 1635 flow [2024-06-27 19:08:35,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1635, PETRI_PLACES=112, PETRI_TRANSITIONS=173} [2024-06-27 19:08:35,970 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-27 19:08:35,970 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 173 transitions, 1635 flow [2024-06-27 19:08:35,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:35,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:35,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:35,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:08:35,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:35,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash -491362061, now seen corresponding path program 1 times [2024-06-27 19:08:35,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:35,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750528080] [2024-06-27 19:08:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:35,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:37,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:37,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750528080] [2024-06-27 19:08:37,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750528080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:37,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:37,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:08:37,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409110362] [2024-06-27 19:08:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:37,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:08:37,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:08:37,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:08:37,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:08:37,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 173 transitions, 1635 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:37,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:37,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:08:37,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:39,050 INFO L124 PetriNetUnfolderBase]: 3571/5819 cut-off events. [2024-06-27 19:08:39,050 INFO L125 PetriNetUnfolderBase]: For 67199/67199 co-relation queries the response was YES. [2024-06-27 19:08:39,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29823 conditions, 5819 events. 3571/5819 cut-off events. For 67199/67199 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 35474 event pairs, 1123 based on Foata normal form. 2/5695 useless extension candidates. Maximal degree in co-relation 29778. Up to 5166 conditions per place. [2024-06-27 19:08:39,092 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 177 selfloop transitions, 14 changer transitions 0/200 dead transitions. [2024-06-27 19:08:39,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 2177 flow [2024-06-27 19:08:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:08:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:08:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 19:08:39,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-27 19:08:39,094 INFO L175 Difference]: Start difference. First operand has 112 places, 173 transitions, 1635 flow. Second operand 5 states and 122 transitions. [2024-06-27 19:08:39,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 2177 flow [2024-06-27 19:08:39,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 200 transitions, 2090 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:08:39,165 INFO L231 Difference]: Finished difference. Result has 113 places, 179 transitions, 1674 flow [2024-06-27 19:08:39,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1674, PETRI_PLACES=113, PETRI_TRANSITIONS=179} [2024-06-27 19:08:39,166 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-06-27 19:08:39,166 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 179 transitions, 1674 flow [2024-06-27 19:08:39,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:39,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:39,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:39,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:08:39,167 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:39,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1373125925, now seen corresponding path program 1 times [2024-06-27 19:08:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:39,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402011814] [2024-06-27 19:08:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:39,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:41,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:41,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402011814] [2024-06-27 19:08:41,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402011814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:41,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:41,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:41,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627620501] [2024-06-27 19:08:41,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:41,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:41,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:41,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:41,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 179 transitions, 1674 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:41,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:41,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:41,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:43,114 INFO L124 PetriNetUnfolderBase]: 4154/6578 cut-off events. [2024-06-27 19:08:43,115 INFO L125 PetriNetUnfolderBase]: For 77403/77403 co-relation queries the response was YES. [2024-06-27 19:08:43,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34095 conditions, 6578 events. 4154/6578 cut-off events. For 77403/77403 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 39377 event pairs, 1290 based on Foata normal form. 2/6429 useless extension candidates. Maximal degree in co-relation 34048. Up to 5870 conditions per place. [2024-06-27 19:08:43,160 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 194 selfloop transitions, 34 changer transitions 0/236 dead transitions. [2024-06-27 19:08:43,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2372 flow [2024-06-27 19:08:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:08:43,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-27 19:08:43,162 INFO L175 Difference]: Start difference. First operand has 113 places, 179 transitions, 1674 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:08:43,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2372 flow [2024-06-27 19:08:43,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 236 transitions, 2338 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-27 19:08:43,247 INFO L231 Difference]: Finished difference. Result has 120 places, 183 transitions, 1810 flow [2024-06-27 19:08:43,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1810, PETRI_PLACES=120, PETRI_TRANSITIONS=183} [2024-06-27 19:08:43,248 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-27 19:08:43,248 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 183 transitions, 1810 flow [2024-06-27 19:08:43,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:43,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:43,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:43,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:08:43,248 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:43,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1521658085, now seen corresponding path program 2 times [2024-06-27 19:08:43,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:43,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073947044] [2024-06-27 19:08:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:43,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:45,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073947044] [2024-06-27 19:08:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073947044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:45,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866109700] [2024-06-27 19:08:45,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:45,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:45,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:45,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:45,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 183 transitions, 1810 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:45,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:45,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:45,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:47,651 INFO L124 PetriNetUnfolderBase]: 4149/6572 cut-off events. [2024-06-27 19:08:47,652 INFO L125 PetriNetUnfolderBase]: For 85416/85416 co-relation queries the response was YES. [2024-06-27 19:08:47,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35276 conditions, 6572 events. 4149/6572 cut-off events. For 85416/85416 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 39374 event pairs, 1283 based on Foata normal form. 2/6423 useless extension candidates. Maximal degree in co-relation 35226. Up to 5909 conditions per place. [2024-06-27 19:08:47,699 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 200 selfloop transitions, 26 changer transitions 0/234 dead transitions. [2024-06-27 19:08:47,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 234 transitions, 2424 flow [2024-06-27 19:08:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:08:47,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 19:08:47,701 INFO L175 Difference]: Start difference. First operand has 120 places, 183 transitions, 1810 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:08:47,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 234 transitions, 2424 flow [2024-06-27 19:08:47,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 234 transitions, 2252 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:47,804 INFO L231 Difference]: Finished difference. Result has 123 places, 184 transitions, 1715 flow [2024-06-27 19:08:47,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1715, PETRI_PLACES=123, PETRI_TRANSITIONS=184} [2024-06-27 19:08:47,805 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-27 19:08:47,805 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 184 transitions, 1715 flow [2024-06-27 19:08:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:47,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:47,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:08:47,805 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:47,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1858082431, now seen corresponding path program 3 times [2024-06-27 19:08:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:47,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250248313] [2024-06-27 19:08:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:47,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250248313] [2024-06-27 19:08:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250248313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:50,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:50,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447525236] [2024-06-27 19:08:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:50,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:50,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:50,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:50,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 184 transitions, 1715 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:50,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:50,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:50,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:52,090 INFO L124 PetriNetUnfolderBase]: 4175/6613 cut-off events. [2024-06-27 19:08:52,091 INFO L125 PetriNetUnfolderBase]: For 88577/88577 co-relation queries the response was YES. [2024-06-27 19:08:52,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35495 conditions, 6613 events. 4175/6613 cut-off events. For 88577/88577 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39724 event pairs, 1285 based on Foata normal form. 2/6464 useless extension candidates. Maximal degree in co-relation 35443. Up to 5796 conditions per place. [2024-06-27 19:08:52,145 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 188 selfloop transitions, 52 changer transitions 0/248 dead transitions. [2024-06-27 19:08:52,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 248 transitions, 2475 flow [2024-06-27 19:08:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:08:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:08:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:08:52,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-27 19:08:52,147 INFO L175 Difference]: Start difference. First operand has 123 places, 184 transitions, 1715 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:08:52,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 248 transitions, 2475 flow [2024-06-27 19:08:52,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 248 transitions, 2412 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:08:52,250 INFO L231 Difference]: Finished difference. Result has 127 places, 188 transitions, 1865 flow [2024-06-27 19:08:52,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1865, PETRI_PLACES=127, PETRI_TRANSITIONS=188} [2024-06-27 19:08:52,250 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-27 19:08:52,251 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 188 transitions, 1865 flow [2024-06-27 19:08:52,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:52,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:52,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:52,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:08:52,251 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:52,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash -770113937, now seen corresponding path program 4 times [2024-06-27 19:08:52,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:52,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813572969] [2024-06-27 19:08:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:52,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:54,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813572969] [2024-06-27 19:08:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813572969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:54,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:54,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550594314] [2024-06-27 19:08:54,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:54,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:54,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 188 transitions, 1865 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:54,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:54,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:54,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:56,861 INFO L124 PetriNetUnfolderBase]: 4173/6462 cut-off events. [2024-06-27 19:08:56,861 INFO L125 PetriNetUnfolderBase]: For 97908/97908 co-relation queries the response was YES. [2024-06-27 19:08:56,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36535 conditions, 6462 events. 4173/6462 cut-off events. For 97908/97908 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 38193 event pairs, 1221 based on Foata normal form. 2/6360 useless extension candidates. Maximal degree in co-relation 36482. Up to 5743 conditions per place. [2024-06-27 19:08:56,914 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 188 selfloop transitions, 63 changer transitions 0/259 dead transitions. [2024-06-27 19:08:56,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 259 transitions, 2688 flow [2024-06-27 19:08:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-27 19:08:56,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:08:56,916 INFO L175 Difference]: Start difference. First operand has 127 places, 188 transitions, 1865 flow. Second operand 10 states and 245 transitions. [2024-06-27 19:08:56,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 259 transitions, 2688 flow [2024-06-27 19:08:57,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 259 transitions, 2507 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:57,018 INFO L231 Difference]: Finished difference. Result has 132 places, 193 transitions, 1942 flow [2024-06-27 19:08:57,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1942, PETRI_PLACES=132, PETRI_TRANSITIONS=193} [2024-06-27 19:08:57,018 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2024-06-27 19:08:57,018 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 193 transitions, 1942 flow [2024-06-27 19:08:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:57,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:57,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:08:57,019 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:08:57,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash -652796541, now seen corresponding path program 1 times [2024-06-27 19:08:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:57,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782039463] [2024-06-27 19:08:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:59,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782039463] [2024-06-27 19:08:59,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782039463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:59,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:59,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:59,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676484261] [2024-06-27 19:08:59,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:59,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:59,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:59,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 193 transitions, 1942 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:59,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:59,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:00,993 INFO L124 PetriNetUnfolderBase]: 4215/6555 cut-off events. [2024-06-27 19:09:00,994 INFO L125 PetriNetUnfolderBase]: For 104492/104492 co-relation queries the response was YES. [2024-06-27 19:09:01,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37219 conditions, 6555 events. 4215/6555 cut-off events. For 104492/104492 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 38534 event pairs, 898 based on Foata normal form. 4/6448 useless extension candidates. Maximal degree in co-relation 37164. Up to 5916 conditions per place. [2024-06-27 19:09:01,045 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 217 selfloop transitions, 28 changer transitions 0/253 dead transitions. [2024-06-27 19:09:01,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 253 transitions, 2684 flow [2024-06-27 19:09:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:09:01,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:09:01,049 INFO L175 Difference]: Start difference. First operand has 132 places, 193 transitions, 1942 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:09:01,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 253 transitions, 2684 flow [2024-06-27 19:09:01,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 253 transitions, 2470 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 19:09:01,146 INFO L231 Difference]: Finished difference. Result has 134 places, 199 transitions, 1907 flow [2024-06-27 19:09:01,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1907, PETRI_PLACES=134, PETRI_TRANSITIONS=199} [2024-06-27 19:09:01,147 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-27 19:09:01,147 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 199 transitions, 1907 flow [2024-06-27 19:09:01,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:01,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:01,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:01,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:09:01,147 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:01,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2082865783, now seen corresponding path program 2 times [2024-06-27 19:09:01,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:01,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620003836] [2024-06-27 19:09:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:01,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:03,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620003836] [2024-06-27 19:09:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620003836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:03,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:03,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:03,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403080] [2024-06-27 19:09:03,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:03,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:03,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:03,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:03,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 199 transitions, 1907 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:03,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:03,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:03,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:05,203 INFO L124 PetriNetUnfolderBase]: 4212/6550 cut-off events. [2024-06-27 19:09:05,203 INFO L125 PetriNetUnfolderBase]: For 112027/112027 co-relation queries the response was YES. [2024-06-27 19:09:05,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37695 conditions, 6550 events. 4212/6550 cut-off events. For 112027/112027 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 38708 event pairs, 1181 based on Foata normal form. 4/6443 useless extension candidates. Maximal degree in co-relation 37638. Up to 5934 conditions per place. [2024-06-27 19:09:05,255 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 215 selfloop transitions, 33 changer transitions 0/256 dead transitions. [2024-06-27 19:09:05,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 256 transitions, 2655 flow [2024-06-27 19:09:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:09:05,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-27 19:09:05,257 INFO L175 Difference]: Start difference. First operand has 134 places, 199 transitions, 1907 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:09:05,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 256 transitions, 2655 flow [2024-06-27 19:09:05,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 256 transitions, 2526 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:05,369 INFO L231 Difference]: Finished difference. Result has 137 places, 202 transitions, 1947 flow [2024-06-27 19:09:05,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1947, PETRI_PLACES=137, PETRI_TRANSITIONS=202} [2024-06-27 19:09:05,369 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-27 19:09:05,369 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 202 transitions, 1947 flow [2024-06-27 19:09:05,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:05,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:05,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:05,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:09:05,370 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:05,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:05,370 INFO L85 PathProgramCache]: Analyzing trace with hash -382767289, now seen corresponding path program 1 times [2024-06-27 19:09:05,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:05,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072415486] [2024-06-27 19:09:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:05,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:07,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072415486] [2024-06-27 19:09:07,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072415486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:07,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:07,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505773663] [2024-06-27 19:09:07,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:07,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:07,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:07,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:07,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:07,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 202 transitions, 1947 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:07,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:07,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:07,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:10,080 INFO L124 PetriNetUnfolderBase]: 4369/6822 cut-off events. [2024-06-27 19:09:10,080 INFO L125 PetriNetUnfolderBase]: For 135254/135254 co-relation queries the response was YES. [2024-06-27 19:09:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40191 conditions, 6822 events. 4369/6822 cut-off events. For 135254/135254 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40670 event pairs, 1187 based on Foata normal form. 16/6717 useless extension candidates. Maximal degree in co-relation 40133. Up to 5995 conditions per place. [2024-06-27 19:09:10,135 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 226 selfloop transitions, 48 changer transitions 0/282 dead transitions. [2024-06-27 19:09:10,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 282 transitions, 3053 flow [2024-06-27 19:09:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:09:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:09:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-27 19:09:10,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-27 19:09:10,136 INFO L175 Difference]: Start difference. First operand has 137 places, 202 transitions, 1947 flow. Second operand 10 states and 238 transitions. [2024-06-27 19:09:10,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 282 transitions, 3053 flow [2024-06-27 19:09:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 282 transitions, 2910 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:10,247 INFO L231 Difference]: Finished difference. Result has 144 places, 216 transitions, 2288 flow [2024-06-27 19:09:10,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2288, PETRI_PLACES=144, PETRI_TRANSITIONS=216} [2024-06-27 19:09:10,247 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2024-06-27 19:09:10,248 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 216 transitions, 2288 flow [2024-06-27 19:09:10,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:10,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:10,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:10,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:09:10,248 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:10,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:10,249 INFO L85 PathProgramCache]: Analyzing trace with hash -73243577, now seen corresponding path program 3 times [2024-06-27 19:09:10,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:10,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356997914] [2024-06-27 19:09:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:10,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:12,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356997914] [2024-06-27 19:09:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356997914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:12,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:12,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546315952] [2024-06-27 19:09:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:12,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:12,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 216 transitions, 2288 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:12,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:12,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:12,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:14,294 INFO L124 PetriNetUnfolderBase]: 4361/6811 cut-off events. [2024-06-27 19:09:14,294 INFO L125 PetriNetUnfolderBase]: For 145019/145019 co-relation queries the response was YES. [2024-06-27 19:09:14,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41551 conditions, 6811 events. 4361/6811 cut-off events. For 145019/145019 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40596 event pairs, 1199 based on Foata normal form. 4/6694 useless extension candidates. Maximal degree in co-relation 41489. Up to 6208 conditions per place. [2024-06-27 19:09:14,352 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 237 selfloop transitions, 25 changer transitions 0/270 dead transitions. [2024-06-27 19:09:14,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 270 transitions, 3054 flow [2024-06-27 19:09:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:09:14,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 19:09:14,354 INFO L175 Difference]: Start difference. First operand has 144 places, 216 transitions, 2288 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:09:14,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 270 transitions, 3054 flow [2024-06-27 19:09:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 270 transitions, 2796 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:14,530 INFO L231 Difference]: Finished difference. Result has 148 places, 219 transitions, 2174 flow [2024-06-27 19:09:14,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2174, PETRI_PLACES=148, PETRI_TRANSITIONS=219} [2024-06-27 19:09:14,530 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-06-27 19:09:14,530 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 219 transitions, 2174 flow [2024-06-27 19:09:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:14,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:14,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:14,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:09:14,531 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:14,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash -65885975, now seen corresponding path program 2 times [2024-06-27 19:09:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632694061] [2024-06-27 19:09:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:17,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:17,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632694061] [2024-06-27 19:09:17,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632694061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:17,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:17,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:17,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996162989] [2024-06-27 19:09:17,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:17,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:17,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:17,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:17,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:17,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:17,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 219 transitions, 2174 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:17,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:17,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:17,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:19,470 INFO L124 PetriNetUnfolderBase]: 4518/7066 cut-off events. [2024-06-27 19:09:19,470 INFO L125 PetriNetUnfolderBase]: For 159298/159298 co-relation queries the response was YES. [2024-06-27 19:09:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43804 conditions, 7066 events. 4518/7066 cut-off events. For 159298/159298 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 42447 event pairs, 1228 based on Foata normal form. 16/6961 useless extension candidates. Maximal degree in co-relation 43740. Up to 6109 conditions per place. [2024-06-27 19:09:19,527 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 199 selfloop transitions, 90 changer transitions 0/297 dead transitions. [2024-06-27 19:09:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 297 transitions, 3442 flow [2024-06-27 19:09:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:09:19,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:09:19,530 INFO L175 Difference]: Start difference. First operand has 148 places, 219 transitions, 2174 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:09:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 297 transitions, 3442 flow [2024-06-27 19:09:19,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 297 transitions, 3328 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:19,697 INFO L231 Difference]: Finished difference. Result has 154 places, 234 transitions, 2810 flow [2024-06-27 19:09:19,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2810, PETRI_PLACES=154, PETRI_TRANSITIONS=234} [2024-06-27 19:09:19,698 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 100 predicate places. [2024-06-27 19:09:19,698 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 234 transitions, 2810 flow [2024-06-27 19:09:19,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:19,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:19,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:19,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:09:19,699 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:19,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1773330167, now seen corresponding path program 3 times [2024-06-27 19:09:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:19,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574841880] [2024-06-27 19:09:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:19,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:22,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:22,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574841880] [2024-06-27 19:09:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574841880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:22,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:22,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:22,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942074116] [2024-06-27 19:09:22,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:22,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:22,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:22,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:22,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 234 transitions, 2810 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:22,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:22,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:22,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:24,641 INFO L124 PetriNetUnfolderBase]: 4616/7225 cut-off events. [2024-06-27 19:09:24,642 INFO L125 PetriNetUnfolderBase]: For 182533/182533 co-relation queries the response was YES. [2024-06-27 19:09:24,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46763 conditions, 7225 events. 4616/7225 cut-off events. For 182533/182533 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 43510 event pairs, 1264 based on Foata normal form. 16/7120 useless extension candidates. Maximal degree in co-relation 46695. Up to 6429 conditions per place. [2024-06-27 19:09:24,701 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 263 selfloop transitions, 28 changer transitions 0/299 dead transitions. [2024-06-27 19:09:24,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 299 transitions, 3700 flow [2024-06-27 19:09:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:09:24,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-27 19:09:24,703 INFO L175 Difference]: Start difference. First operand has 154 places, 234 transitions, 2810 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:09:24,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 299 transitions, 3700 flow [2024-06-27 19:09:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 299 transitions, 3343 flow, removed 162 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:24,989 INFO L231 Difference]: Finished difference. Result has 160 places, 236 transitions, 2587 flow [2024-06-27 19:09:24,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2587, PETRI_PLACES=160, PETRI_TRANSITIONS=236} [2024-06-27 19:09:24,990 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2024-06-27 19:09:24,990 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 236 transitions, 2587 flow [2024-06-27 19:09:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:24,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:24,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:24,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:09:24,991 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:24,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash -846979099, now seen corresponding path program 4 times [2024-06-27 19:09:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:24,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222398630] [2024-06-27 19:09:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:27,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:27,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222398630] [2024-06-27 19:09:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222398630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:27,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:27,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:27,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408119408] [2024-06-27 19:09:27,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:27,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:27,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:27,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:27,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 236 transitions, 2587 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:27,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:27,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:27,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:29,721 INFO L124 PetriNetUnfolderBase]: 4740/7437 cut-off events. [2024-06-27 19:09:29,721 INFO L125 PetriNetUnfolderBase]: For 182451/182451 co-relation queries the response was YES. [2024-06-27 19:09:29,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47926 conditions, 7437 events. 4740/7437 cut-off events. For 182451/182451 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 45142 event pairs, 1237 based on Foata normal form. 12/7328 useless extension candidates. Maximal degree in co-relation 47856. Up to 6001 conditions per place. [2024-06-27 19:09:29,785 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 256 selfloop transitions, 45 changer transitions 0/309 dead transitions. [2024-06-27 19:09:29,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 309 transitions, 3699 flow [2024-06-27 19:09:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:09:29,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-27 19:09:29,787 INFO L175 Difference]: Start difference. First operand has 160 places, 236 transitions, 2587 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:09:29,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 309 transitions, 3699 flow [2024-06-27 19:09:30,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 309 transitions, 3619 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:09:30,140 INFO L231 Difference]: Finished difference. Result has 163 places, 240 transitions, 2749 flow [2024-06-27 19:09:30,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2749, PETRI_PLACES=163, PETRI_TRANSITIONS=240} [2024-06-27 19:09:30,140 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-27 19:09:30,140 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 240 transitions, 2749 flow [2024-06-27 19:09:30,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:30,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:30,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:30,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:09:30,141 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:30,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 235138610, now seen corresponding path program 1 times [2024-06-27 19:09:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:30,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228121524] [2024-06-27 19:09:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:31,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228121524] [2024-06-27 19:09:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228121524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:31,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:31,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:09:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020907224] [2024-06-27 19:09:31,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:09:31,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:09:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:09:31,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:31,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 240 transitions, 2749 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:31,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:31,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:33,723 INFO L124 PetriNetUnfolderBase]: 4786/7597 cut-off events. [2024-06-27 19:09:33,724 INFO L125 PetriNetUnfolderBase]: For 188682/188682 co-relation queries the response was YES. [2024-06-27 19:09:33,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48911 conditions, 7597 events. 4786/7597 cut-off events. For 188682/188682 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 46637 event pairs, 1314 based on Foata normal form. 2/7448 useless extension candidates. Maximal degree in co-relation 48839. Up to 6779 conditions per place. [2024-06-27 19:09:33,792 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 246 selfloop transitions, 36 changer transitions 0/290 dead transitions. [2024-06-27 19:09:33,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 290 transitions, 3779 flow [2024-06-27 19:09:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:09:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:09:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:09:33,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2024-06-27 19:09:33,794 INFO L175 Difference]: Start difference. First operand has 163 places, 240 transitions, 2749 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:09:33,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 290 transitions, 3779 flow [2024-06-27 19:09:34,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 290 transitions, 3676 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:34,030 INFO L231 Difference]: Finished difference. Result has 166 places, 250 transitions, 2923 flow [2024-06-27 19:09:34,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2923, PETRI_PLACES=166, PETRI_TRANSITIONS=250} [2024-06-27 19:09:34,031 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 112 predicate places. [2024-06-27 19:09:34,031 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 250 transitions, 2923 flow [2024-06-27 19:09:34,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:34,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:34,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:09:34,031 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:34,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash -921909305, now seen corresponding path program 5 times [2024-06-27 19:09:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660764137] [2024-06-27 19:09:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:36,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:36,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660764137] [2024-06-27 19:09:36,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660764137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:36,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:36,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:36,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211314497] [2024-06-27 19:09:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:36,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:36,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:36,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 250 transitions, 2923 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:36,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:36,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:38,820 INFO L124 PetriNetUnfolderBase]: 5208/8174 cut-off events. [2024-06-27 19:09:38,820 INFO L125 PetriNetUnfolderBase]: For 229401/229401 co-relation queries the response was YES. [2024-06-27 19:09:38,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55384 conditions, 8174 events. 5208/8174 cut-off events. For 229401/229401 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 50719 event pairs, 1280 based on Foata normal form. 12/8058 useless extension candidates. Maximal degree in co-relation 55309. Up to 6725 conditions per place. [2024-06-27 19:09:38,894 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 232 selfloop transitions, 102 changer transitions 0/342 dead transitions. [2024-06-27 19:09:38,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 342 transitions, 4618 flow [2024-06-27 19:09:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 19:09:38,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 19:09:38,895 INFO L175 Difference]: Start difference. First operand has 166 places, 250 transitions, 2923 flow. Second operand 9 states and 228 transitions. [2024-06-27 19:09:38,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 342 transitions, 4618 flow [2024-06-27 19:09:39,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 342 transitions, 4602 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 19:09:39,162 INFO L231 Difference]: Finished difference. Result has 178 places, 276 transitions, 3887 flow [2024-06-27 19:09:39,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3887, PETRI_PLACES=178, PETRI_TRANSITIONS=276} [2024-06-27 19:09:39,163 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2024-06-27 19:09:39,163 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 276 transitions, 3887 flow [2024-06-27 19:09:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:39,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:39,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:09:39,164 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:39,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash -922176215, now seen corresponding path program 6 times [2024-06-27 19:09:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:39,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157695050] [2024-06-27 19:09:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:42,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:42,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157695050] [2024-06-27 19:09:42,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157695050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:42,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:42,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:42,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488311577] [2024-06-27 19:09:42,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:42,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:42,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:42,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 276 transitions, 3887 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:42,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:42,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:42,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:44,797 INFO L124 PetriNetUnfolderBase]: 5198/8156 cut-off events. [2024-06-27 19:09:44,797 INFO L125 PetriNetUnfolderBase]: For 260663/260663 co-relation queries the response was YES. [2024-06-27 19:09:44,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58378 conditions, 8156 events. 5198/8156 cut-off events. For 260663/260663 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 50621 event pairs, 1286 based on Foata normal form. 16/8044 useless extension candidates. Maximal degree in co-relation 58296. Up to 7102 conditions per place. [2024-06-27 19:09:44,887 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 280 selfloop transitions, 63 changer transitions 0/351 dead transitions. [2024-06-27 19:09:44,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 351 transitions, 5029 flow [2024-06-27 19:09:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:09:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:09:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-27 19:09:44,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-27 19:09:44,889 INFO L175 Difference]: Start difference. First operand has 178 places, 276 transitions, 3887 flow. Second operand 10 states and 247 transitions. [2024-06-27 19:09:44,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 351 transitions, 5029 flow [2024-06-27 19:09:45,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 351 transitions, 4584 flow, removed 208 selfloop flow, removed 2 redundant places. [2024-06-27 19:09:45,318 INFO L231 Difference]: Finished difference. Result has 186 places, 281 transitions, 3762 flow [2024-06-27 19:09:45,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3762, PETRI_PLACES=186, PETRI_TRANSITIONS=281} [2024-06-27 19:09:45,319 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-27 19:09:45,319 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 281 transitions, 3762 flow [2024-06-27 19:09:45,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:45,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:45,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:45,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:09:45,320 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:45,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash -360048697, now seen corresponding path program 7 times [2024-06-27 19:09:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:45,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272873016] [2024-06-27 19:09:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:48,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:48,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272873016] [2024-06-27 19:09:48,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272873016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:48,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765898975] [2024-06-27 19:09:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:48,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:48,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 281 transitions, 3762 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:48,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:48,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:50,869 INFO L124 PetriNetUnfolderBase]: 5466/8612 cut-off events. [2024-06-27 19:09:50,869 INFO L125 PetriNetUnfolderBase]: For 275210/275210 co-relation queries the response was YES. [2024-06-27 19:09:50,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62298 conditions, 8612 events. 5466/8612 cut-off events. For 275210/275210 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53858 event pairs, 1197 based on Foata normal form. 12/8496 useless extension candidates. Maximal degree in co-relation 62214. Up to 5307 conditions per place. [2024-06-27 19:09:50,955 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 231 selfloop transitions, 118 changer transitions 0/357 dead transitions. [2024-06-27 19:09:50,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 357 transitions, 5170 flow [2024-06-27 19:09:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:09:50,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-27 19:09:50,956 INFO L175 Difference]: Start difference. First operand has 186 places, 281 transitions, 3762 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:09:50,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 357 transitions, 5170 flow [2024-06-27 19:09:51,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 357 transitions, 5041 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:09:51,358 INFO L231 Difference]: Finished difference. Result has 189 places, 289 transitions, 4229 flow [2024-06-27 19:09:51,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4229, PETRI_PLACES=189, PETRI_TRANSITIONS=289} [2024-06-27 19:09:51,358 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 135 predicate places. [2024-06-27 19:09:51,358 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 289 transitions, 4229 flow [2024-06-27 19:09:51,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:51,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:51,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:51,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:09:51,359 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:51,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash -673747927, now seen corresponding path program 8 times [2024-06-27 19:09:51,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:51,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218697246] [2024-06-27 19:09:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218697246] [2024-06-27 19:09:54,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218697246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:54,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:54,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:09:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520758641] [2024-06-27 19:09:54,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:54,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:09:54,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:09:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:09:54,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:54,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 289 transitions, 4229 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:54,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:54,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:54,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:56,957 INFO L124 PetriNetUnfolderBase]: 5729/9004 cut-off events. [2024-06-27 19:09:56,957 INFO L125 PetriNetUnfolderBase]: For 328074/328074 co-relation queries the response was YES. [2024-06-27 19:09:57,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68929 conditions, 9004 events. 5729/9004 cut-off events. For 328074/328074 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 56987 event pairs, 1404 based on Foata normal form. 12/8888 useless extension candidates. Maximal degree in co-relation 68843. Up to 7557 conditions per place. [2024-06-27 19:09:57,053 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 201 selfloop transitions, 158 changer transitions 0/367 dead transitions. [2024-06-27 19:09:57,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 367 transitions, 5915 flow [2024-06-27 19:09:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:09:57,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-27 19:09:57,054 INFO L175 Difference]: Start difference. First operand has 189 places, 289 transitions, 4229 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:09:57,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 367 transitions, 5915 flow [2024-06-27 19:09:57,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 367 transitions, 5746 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:57,521 INFO L231 Difference]: Finished difference. Result has 194 places, 301 transitions, 4972 flow [2024-06-27 19:09:57,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4972, PETRI_PLACES=194, PETRI_TRANSITIONS=301} [2024-06-27 19:09:57,522 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 140 predicate places. [2024-06-27 19:09:57,522 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 301 transitions, 4972 flow [2024-06-27 19:09:57,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:57,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:57,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:57,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:09:57,523 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:09:57,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:57,523 INFO L85 PathProgramCache]: Analyzing trace with hash -674014837, now seen corresponding path program 9 times [2024-06-27 19:09:57,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:57,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791153413] [2024-06-27 19:09:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:57,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:00,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791153413] [2024-06-27 19:10:00,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791153413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:00,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:00,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:00,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6348061] [2024-06-27 19:10:00,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:00,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:00,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:00,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 301 transitions, 4972 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:00,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:00,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:00,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:03,316 INFO L124 PetriNetUnfolderBase]: 5701/8977 cut-off events. [2024-06-27 19:10:03,316 INFO L125 PetriNetUnfolderBase]: For 331493/331493 co-relation queries the response was YES. [2024-06-27 19:10:03,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69170 conditions, 8977 events. 5701/8977 cut-off events. For 331493/331493 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 56793 event pairs, 1426 based on Foata normal form. 16/8867 useless extension candidates. Maximal degree in co-relation 69081. Up to 7659 conditions per place. [2024-06-27 19:10:03,412 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 298 selfloop transitions, 74 changer transitions 0/380 dead transitions. [2024-06-27 19:10:03,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 380 transitions, 6036 flow [2024-06-27 19:10:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:10:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:10:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2024-06-27 19:10:03,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-27 19:10:03,414 INFO L175 Difference]: Start difference. First operand has 194 places, 301 transitions, 4972 flow. Second operand 11 states and 272 transitions. [2024-06-27 19:10:03,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 380 transitions, 6036 flow [2024-06-27 19:10:03,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 380 transitions, 5567 flow, removed 158 selfloop flow, removed 4 redundant places. [2024-06-27 19:10:03,931 INFO L231 Difference]: Finished difference. Result has 201 places, 301 transitions, 4667 flow [2024-06-27 19:10:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4667, PETRI_PLACES=201, PETRI_TRANSITIONS=301} [2024-06-27 19:10:03,932 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 147 predicate places. [2024-06-27 19:10:03,932 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 301 transitions, 4667 flow [2024-06-27 19:10:03,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:03,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:03,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:10:03,933 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:03,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash 151636444, now seen corresponding path program 2 times [2024-06-27 19:10:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:03,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215059352] [2024-06-27 19:10:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215059352] [2024-06-27 19:10:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215059352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:05,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:05,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:10:05,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113302657] [2024-06-27 19:10:05,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:05,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:10:05,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:05,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:10:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:10:05,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:05,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 301 transitions, 4667 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:05,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:05,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:05,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:08,014 INFO L124 PetriNetUnfolderBase]: 5695/9030 cut-off events. [2024-06-27 19:10:08,014 INFO L125 PetriNetUnfolderBase]: For 312379/312379 co-relation queries the response was YES. [2024-06-27 19:10:08,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68338 conditions, 9030 events. 5695/9030 cut-off events. For 312379/312379 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 57153 event pairs, 1581 based on Foata normal form. 2/8876 useless extension candidates. Maximal degree in co-relation 68247. Up to 8188 conditions per place. [2024-06-27 19:10:08,129 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 287 selfloop transitions, 38 changer transitions 0/333 dead transitions. [2024-06-27 19:10:08,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 333 transitions, 5567 flow [2024-06-27 19:10:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:10:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:10:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:10:08,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965277777777778 [2024-06-27 19:10:08,131 INFO L175 Difference]: Start difference. First operand has 201 places, 301 transitions, 4667 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:10:08,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 333 transitions, 5567 flow [2024-06-27 19:10:08,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 333 transitions, 5431 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:10:08,619 INFO L231 Difference]: Finished difference. Result has 198 places, 303 transitions, 4647 flow [2024-06-27 19:10:08,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4647, PETRI_PLACES=198, PETRI_TRANSITIONS=303} [2024-06-27 19:10:08,620 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2024-06-27 19:10:08,620 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 303 transitions, 4647 flow [2024-06-27 19:10:08,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:08,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:08,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:10:08,621 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:08,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:08,621 INFO L85 PathProgramCache]: Analyzing trace with hash 241841585, now seen corresponding path program 1 times [2024-06-27 19:10:08,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:08,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62522040] [2024-06-27 19:10:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:10,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:10,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62522040] [2024-06-27 19:10:10,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62522040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:10,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:10,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:10:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81689285] [2024-06-27 19:10:10,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:10,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:10:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:10:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:10:10,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:10:10,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 303 transitions, 4647 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:10,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:10,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:10:10,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:12,898 INFO L124 PetriNetUnfolderBase]: 5406/8701 cut-off events. [2024-06-27 19:10:12,898 INFO L125 PetriNetUnfolderBase]: For 295137/295137 co-relation queries the response was YES. [2024-06-27 19:10:12,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65781 conditions, 8701 events. 5406/8701 cut-off events. For 295137/295137 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 56773 event pairs, 1329 based on Foata normal form. 2/8558 useless extension candidates. Maximal degree in co-relation 65689. Up to 7891 conditions per place. [2024-06-27 19:10:12,997 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 312 selfloop transitions, 15 changer transitions 0/339 dead transitions. [2024-06-27 19:10:12,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 339 transitions, 5585 flow [2024-06-27 19:10:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:10:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:10:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:10:12,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-27 19:10:12,999 INFO L175 Difference]: Start difference. First operand has 198 places, 303 transitions, 4647 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:10:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 339 transitions, 5585 flow [2024-06-27 19:10:13,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 339 transitions, 5518 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:13,465 INFO L231 Difference]: Finished difference. Result has 203 places, 309 transitions, 4774 flow [2024-06-27 19:10:13,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4774, PETRI_PLACES=203, PETRI_TRANSITIONS=309} [2024-06-27 19:10:13,466 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 149 predicate places. [2024-06-27 19:10:13,466 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 309 transitions, 4774 flow [2024-06-27 19:10:13,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:13,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:13,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:13,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:10:13,467 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:13,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1106400275, now seen corresponding path program 2 times [2024-06-27 19:10:13,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:13,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193655149] [2024-06-27 19:10:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:15,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:15,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193655149] [2024-06-27 19:10:15,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193655149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:15,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:15,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:10:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919489180] [2024-06-27 19:10:15,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:10:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:10:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:10:15,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:10:15,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 309 transitions, 4774 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:15,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:15,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:10:15,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:17,546 INFO L124 PetriNetUnfolderBase]: 5415/8770 cut-off events. [2024-06-27 19:10:17,547 INFO L125 PetriNetUnfolderBase]: For 305861/305861 co-relation queries the response was YES. [2024-06-27 19:10:17,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66575 conditions, 8770 events. 5415/8770 cut-off events. For 305861/305861 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 57159 event pairs, 1403 based on Foata normal form. 2/8603 useless extension candidates. Maximal degree in co-relation 66480. Up to 7878 conditions per place. [2024-06-27 19:10:17,647 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 310 selfloop transitions, 19 changer transitions 0/341 dead transitions. [2024-06-27 19:10:17,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 341 transitions, 5668 flow [2024-06-27 19:10:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:10:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:10:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:10:17,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034722222222222 [2024-06-27 19:10:17,649 INFO L175 Difference]: Start difference. First operand has 203 places, 309 transitions, 4774 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:10:17,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 341 transitions, 5668 flow [2024-06-27 19:10:18,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 341 transitions, 5573 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:18,096 INFO L231 Difference]: Finished difference. Result has 207 places, 312 transitions, 4782 flow [2024-06-27 19:10:18,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4782, PETRI_PLACES=207, PETRI_TRANSITIONS=312} [2024-06-27 19:10:18,097 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 153 predicate places. [2024-06-27 19:10:18,097 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 312 transitions, 4782 flow [2024-06-27 19:10:18,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:18,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:18,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:18,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:10:18,098 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:18,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:18,098 INFO L85 PathProgramCache]: Analyzing trace with hash 136446210, now seen corresponding path program 1 times [2024-06-27 19:10:18,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:18,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002967608] [2024-06-27 19:10:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:18,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:20,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:20,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002967608] [2024-06-27 19:10:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002967608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:20,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378385880] [2024-06-27 19:10:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:20,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:20,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 312 transitions, 4782 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:20,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:20,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:20,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:23,736 INFO L124 PetriNetUnfolderBase]: 5787/9183 cut-off events. [2024-06-27 19:10:23,736 INFO L125 PetriNetUnfolderBase]: For 341114/341114 co-relation queries the response was YES. [2024-06-27 19:10:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70618 conditions, 9183 events. 5787/9183 cut-off events. For 341114/341114 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 57974 event pairs, 1152 based on Foata normal form. 12/9039 useless extension candidates. Maximal degree in co-relation 70521. Up to 8160 conditions per place. [2024-06-27 19:10:23,831 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 339 selfloop transitions, 39 changer transitions 0/386 dead transitions. [2024-06-27 19:10:23,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 386 transitions, 6014 flow [2024-06-27 19:10:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:10:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:10:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-27 19:10:23,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-27 19:10:23,833 INFO L175 Difference]: Start difference. First operand has 207 places, 312 transitions, 4782 flow. Second operand 10 states and 237 transitions. [2024-06-27 19:10:23,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 386 transitions, 6014 flow [2024-06-27 19:10:24,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 386 transitions, 5955 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:10:24,290 INFO L231 Difference]: Finished difference. Result has 215 places, 320 transitions, 5095 flow [2024-06-27 19:10:24,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5095, PETRI_PLACES=215, PETRI_TRANSITIONS=320} [2024-06-27 19:10:24,290 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 161 predicate places. [2024-06-27 19:10:24,290 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 320 transitions, 5095 flow [2024-06-27 19:10:24,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:24,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:24,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:24,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:10:24,291 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:24,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1728391192, now seen corresponding path program 2 times [2024-06-27 19:10:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:24,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089625200] [2024-06-27 19:10:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:24,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089625200] [2024-06-27 19:10:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089625200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:27,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:27,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:27,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011121545] [2024-06-27 19:10:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:27,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:27,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:27,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 320 transitions, 5095 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:27,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:27,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:27,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:29,862 INFO L124 PetriNetUnfolderBase]: 5767/9154 cut-off events. [2024-06-27 19:10:29,863 INFO L125 PetriNetUnfolderBase]: For 342939/342939 co-relation queries the response was YES. [2024-06-27 19:10:29,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70487 conditions, 9154 events. 5767/9154 cut-off events. For 342939/342939 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58165 event pairs, 1493 based on Foata normal form. 12/9009 useless extension candidates. Maximal degree in co-relation 70387. Up to 8162 conditions per place. [2024-06-27 19:10:29,968 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 343 selfloop transitions, 35 changer transitions 0/386 dead transitions. [2024-06-27 19:10:29,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 386 transitions, 6077 flow [2024-06-27 19:10:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:10:29,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-27 19:10:29,969 INFO L175 Difference]: Start difference. First operand has 215 places, 320 transitions, 5095 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:10:29,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 386 transitions, 6077 flow [2024-06-27 19:10:30,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 386 transitions, 5843 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-27 19:10:30,674 INFO L231 Difference]: Finished difference. Result has 219 places, 320 transitions, 4938 flow [2024-06-27 19:10:30,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4861, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4938, PETRI_PLACES=219, PETRI_TRANSITIONS=320} [2024-06-27 19:10:30,675 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 165 predicate places. [2024-06-27 19:10:30,675 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 320 transitions, 4938 flow [2024-06-27 19:10:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:30,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:30,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:30,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:10:30,676 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:30,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash 861157124, now seen corresponding path program 3 times [2024-06-27 19:10:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:30,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359001074] [2024-06-27 19:10:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359001074] [2024-06-27 19:10:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359001074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:33,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:33,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641715964] [2024-06-27 19:10:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:33,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:33,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 320 transitions, 4938 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:33,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:33,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:33,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:36,110 INFO L124 PetriNetUnfolderBase]: 5747/9123 cut-off events. [2024-06-27 19:10:36,110 INFO L125 PetriNetUnfolderBase]: For 331297/331297 co-relation queries the response was YES. [2024-06-27 19:10:36,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69242 conditions, 9123 events. 5747/9123 cut-off events. For 331297/331297 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 57924 event pairs, 1477 based on Foata normal form. 12/8978 useless extension candidates. Maximal degree in co-relation 69140. Up to 8176 conditions per place. [2024-06-27 19:10:36,211 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 347 selfloop transitions, 27 changer transitions 0/382 dead transitions. [2024-06-27 19:10:36,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 382 transitions, 5842 flow [2024-06-27 19:10:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:10:36,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-27 19:10:36,212 INFO L175 Difference]: Start difference. First operand has 219 places, 320 transitions, 4938 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:10:36,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 382 transitions, 5842 flow [2024-06-27 19:10:36,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 382 transitions, 5687 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:36,736 INFO L231 Difference]: Finished difference. Result has 220 places, 319 transitions, 4774 flow [2024-06-27 19:10:36,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4774, PETRI_PLACES=220, PETRI_TRANSITIONS=319} [2024-06-27 19:10:36,737 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 166 predicate places. [2024-06-27 19:10:36,737 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 319 transitions, 4774 flow [2024-06-27 19:10:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:36,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:36,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:36,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:10:36,738 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:36,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:36,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1300635442, now seen corresponding path program 1 times [2024-06-27 19:10:36,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:36,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008590293] [2024-06-27 19:10:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:36,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:38,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:38,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008590293] [2024-06-27 19:10:38,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008590293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:38,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:38,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114918067] [2024-06-27 19:10:38,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:38,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:38,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 319 transitions, 4774 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:38,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:38,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:41,521 INFO L124 PetriNetUnfolderBase]: 5839/9139 cut-off events. [2024-06-27 19:10:41,521 INFO L125 PetriNetUnfolderBase]: For 323549/323549 co-relation queries the response was YES. [2024-06-27 19:10:41,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69232 conditions, 9139 events. 5839/9139 cut-off events. For 323549/323549 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 57424 event pairs, 1507 based on Foata normal form. 4/9022 useless extension candidates. Maximal degree in co-relation 69129. Up to 8164 conditions per place. [2024-06-27 19:10:41,638 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 323 selfloop transitions, 45 changer transitions 0/376 dead transitions. [2024-06-27 19:10:41,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 376 transitions, 6080 flow [2024-06-27 19:10:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:10:41,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 19:10:41,640 INFO L175 Difference]: Start difference. First operand has 220 places, 319 transitions, 4774 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:10:41,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 376 transitions, 6080 flow [2024-06-27 19:10:42,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 376 transitions, 6001 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:42,253 INFO L231 Difference]: Finished difference. Result has 220 places, 325 transitions, 4901 flow [2024-06-27 19:10:42,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4901, PETRI_PLACES=220, PETRI_TRANSITIONS=325} [2024-06-27 19:10:42,254 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 166 predicate places. [2024-06-27 19:10:42,254 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 325 transitions, 4901 flow [2024-06-27 19:10:42,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:42,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:42,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:42,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:10:42,255 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:42,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash 825036332, now seen corresponding path program 2 times [2024-06-27 19:10:42,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:42,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098493430] [2024-06-27 19:10:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:42,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098493430] [2024-06-27 19:10:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098493430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:44,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989178958] [2024-06-27 19:10:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:44,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:44,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:44,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:44,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 325 transitions, 4901 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:44,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:44,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:44,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:47,175 INFO L124 PetriNetUnfolderBase]: 5931/9290 cut-off events. [2024-06-27 19:10:47,175 INFO L125 PetriNetUnfolderBase]: For 337070/337070 co-relation queries the response was YES. [2024-06-27 19:10:47,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71035 conditions, 9290 events. 5931/9290 cut-off events. For 337070/337070 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 58580 event pairs, 1510 based on Foata normal form. 4/9164 useless extension candidates. Maximal degree in co-relation 70931. Up to 8228 conditions per place. [2024-06-27 19:10:47,288 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 314 selfloop transitions, 48 changer transitions 0/370 dead transitions. [2024-06-27 19:10:47,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 370 transitions, 6077 flow [2024-06-27 19:10:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:10:47,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-27 19:10:47,289 INFO L175 Difference]: Start difference. First operand has 220 places, 325 transitions, 4901 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:10:47,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 370 transitions, 6077 flow [2024-06-27 19:10:47,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 370 transitions, 6017 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:47,924 INFO L231 Difference]: Finished difference. Result has 225 places, 328 transitions, 5001 flow [2024-06-27 19:10:47,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5001, PETRI_PLACES=225, PETRI_TRANSITIONS=328} [2024-06-27 19:10:47,925 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-27 19:10:47,925 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 328 transitions, 5001 flow [2024-06-27 19:10:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:47,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:47,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:47,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:10:47,926 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:47,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash -916405012, now seen corresponding path program 3 times [2024-06-27 19:10:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:47,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544880903] [2024-06-27 19:10:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:50,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:50,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544880903] [2024-06-27 19:10:50,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544880903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:50,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:50,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296943776] [2024-06-27 19:10:50,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:50,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:50,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:50,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 328 transitions, 5001 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:50,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:50,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:50,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:53,069 INFO L124 PetriNetUnfolderBase]: 5919/9294 cut-off events. [2024-06-27 19:10:53,070 INFO L125 PetriNetUnfolderBase]: For 336378/336378 co-relation queries the response was YES. [2024-06-27 19:10:53,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70966 conditions, 9294 events. 5919/9294 cut-off events. For 336378/336378 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 58748 event pairs, 1521 based on Foata normal form. 4/9170 useless extension candidates. Maximal degree in co-relation 70860. Up to 8547 conditions per place. [2024-06-27 19:10:53,187 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 337 selfloop transitions, 20 changer transitions 0/365 dead transitions. [2024-06-27 19:10:53,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 365 transitions, 5989 flow [2024-06-27 19:10:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:10:53,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 19:10:53,189 INFO L175 Difference]: Start difference. First operand has 225 places, 328 transitions, 5001 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:10:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 365 transitions, 5989 flow [2024-06-27 19:10:54,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 365 transitions, 5855 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:10:54,017 INFO L231 Difference]: Finished difference. Result has 227 places, 328 transitions, 4913 flow [2024-06-27 19:10:54,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4913, PETRI_PLACES=227, PETRI_TRANSITIONS=328} [2024-06-27 19:10:54,018 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 173 predicate places. [2024-06-27 19:10:54,018 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 328 transitions, 4913 flow [2024-06-27 19:10:54,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:54,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:54,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:10:54,018 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:54,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash -67731738, now seen corresponding path program 1 times [2024-06-27 19:10:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:54,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096673578] [2024-06-27 19:10:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096673578] [2024-06-27 19:10:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096673578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:56,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093029273] [2024-06-27 19:10:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:56,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:56,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:56,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:10:56,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 328 transitions, 4913 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:56,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:56,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:10:56,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:58,938 INFO L124 PetriNetUnfolderBase]: 5682/9152 cut-off events. [2024-06-27 19:10:58,938 INFO L125 PetriNetUnfolderBase]: For 310498/310499 co-relation queries the response was YES. [2024-06-27 19:10:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68916 conditions, 9152 events. 5682/9152 cut-off events. For 310498/310499 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 59612 event pairs, 1290 based on Foata normal form. 3/8979 useless extension candidates. Maximal degree in co-relation 68809. Up to 8074 conditions per place. [2024-06-27 19:10:59,055 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 334 selfloop transitions, 41 changer transitions 0/387 dead transitions. [2024-06-27 19:10:59,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 387 transitions, 6381 flow [2024-06-27 19:10:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:10:59,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 19:10:59,058 INFO L175 Difference]: Start difference. First operand has 227 places, 328 transitions, 4913 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:10:59,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 387 transitions, 6381 flow [2024-06-27 19:10:59,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 387 transitions, 6294 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:10:59,716 INFO L231 Difference]: Finished difference. Result has 227 places, 338 transitions, 5226 flow [2024-06-27 19:10:59,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4826, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5226, PETRI_PLACES=227, PETRI_TRANSITIONS=338} [2024-06-27 19:10:59,717 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 173 predicate places. [2024-06-27 19:10:59,717 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 338 transitions, 5226 flow [2024-06-27 19:10:59,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:59,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:59,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:10:59,718 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:10:59,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1092843372, now seen corresponding path program 2 times [2024-06-27 19:10:59,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835715877] [2024-06-27 19:10:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:02,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:02,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835715877] [2024-06-27 19:11:02,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835715877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:02,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358158429] [2024-06-27 19:11:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:02,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:02,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:11:02,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 338 transitions, 5226 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:02,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:02,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:11:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:04,945 INFO L124 PetriNetUnfolderBase]: 5729/9127 cut-off events. [2024-06-27 19:11:04,945 INFO L125 PetriNetUnfolderBase]: For 325638/325639 co-relation queries the response was YES. [2024-06-27 19:11:05,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70479 conditions, 9127 events. 5729/9127 cut-off events. For 325638/325639 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59275 event pairs, 1309 based on Foata normal form. 3/8981 useless extension candidates. Maximal degree in co-relation 70372. Up to 8230 conditions per place. [2024-06-27 19:11:05,051 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 354 selfloop transitions, 27 changer transitions 0/393 dead transitions. [2024-06-27 19:11:05,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 393 transitions, 6483 flow [2024-06-27 19:11:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:11:05,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 19:11:05,052 INFO L175 Difference]: Start difference. First operand has 227 places, 338 transitions, 5226 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:11:05,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 393 transitions, 6483 flow [2024-06-27 19:11:05,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 393 transitions, 6366 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:11:05,588 INFO L231 Difference]: Finished difference. Result has 233 places, 354 transitions, 5502 flow [2024-06-27 19:11:05,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5502, PETRI_PLACES=233, PETRI_TRANSITIONS=354} [2024-06-27 19:11:05,589 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 179 predicate places. [2024-06-27 19:11:05,589 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 354 transitions, 5502 flow [2024-06-27 19:11:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:05,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:05,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:05,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:11:05,590 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:05,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash 825252402, now seen corresponding path program 3 times [2024-06-27 19:11:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:05,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031952775] [2024-06-27 19:11:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:05,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:08,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031952775] [2024-06-27 19:11:08,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031952775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:08,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:08,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:08,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767656723] [2024-06-27 19:11:08,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:08,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:08,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:11:08,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 354 transitions, 5502 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:08,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:11:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:10,534 INFO L124 PetriNetUnfolderBase]: 5751/9142 cut-off events. [2024-06-27 19:11:10,534 INFO L125 PetriNetUnfolderBase]: For 338048/338049 co-relation queries the response was YES. [2024-06-27 19:11:10,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72105 conditions, 9142 events. 5751/9142 cut-off events. For 338048/338049 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 59089 event pairs, 1398 based on Foata normal form. 4/8996 useless extension candidates. Maximal degree in co-relation 71995. Up to 8291 conditions per place. [2024-06-27 19:11:10,651 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 358 selfloop transitions, 19 changer transitions 0/389 dead transitions. [2024-06-27 19:11:10,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 389 transitions, 6510 flow [2024-06-27 19:11:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:11:10,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 19:11:10,653 INFO L175 Difference]: Start difference. First operand has 233 places, 354 transitions, 5502 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:11:10,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 389 transitions, 6510 flow [2024-06-27 19:11:11,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 389 transitions, 6356 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-27 19:11:11,341 INFO L231 Difference]: Finished difference. Result has 238 places, 358 transitions, 5501 flow [2024-06-27 19:11:11,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5501, PETRI_PLACES=238, PETRI_TRANSITIONS=358} [2024-06-27 19:11:11,341 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 184 predicate places. [2024-06-27 19:11:11,341 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 358 transitions, 5501 flow [2024-06-27 19:11:11,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:11,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:11,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:11:11,342 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:11,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -916389140, now seen corresponding path program 1 times [2024-06-27 19:11:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419193956] [2024-06-27 19:11:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:11,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:14,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:14,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419193956] [2024-06-27 19:11:14,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419193956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:14,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:14,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:14,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8060612] [2024-06-27 19:11:14,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:14,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:14,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:14,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 358 transitions, 5501 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:14,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:14,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:17,099 INFO L124 PetriNetUnfolderBase]: 6163/9748 cut-off events. [2024-06-27 19:11:17,099 INFO L125 PetriNetUnfolderBase]: For 376688/376688 co-relation queries the response was YES. [2024-06-27 19:11:17,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76077 conditions, 9748 events. 6163/9748 cut-off events. For 376688/376688 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 61992 event pairs, 1581 based on Foata normal form. 2/9577 useless extension candidates. Maximal degree in co-relation 75965. Up to 8924 conditions per place. [2024-06-27 19:11:17,212 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 365 selfloop transitions, 23 changer transitions 0/396 dead transitions. [2024-06-27 19:11:17,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 396 transitions, 6593 flow [2024-06-27 19:11:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 19:11:17,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 19:11:17,213 INFO L175 Difference]: Start difference. First operand has 238 places, 358 transitions, 5501 flow. Second operand 7 states and 159 transitions. [2024-06-27 19:11:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 396 transitions, 6593 flow [2024-06-27 19:11:17,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 396 transitions, 6430 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:17,898 INFO L231 Difference]: Finished difference. Result has 240 places, 360 transitions, 5435 flow [2024-06-27 19:11:17,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5342, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5435, PETRI_PLACES=240, PETRI_TRANSITIONS=360} [2024-06-27 19:11:17,898 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 186 predicate places. [2024-06-27 19:11:17,899 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 360 transitions, 5435 flow [2024-06-27 19:11:17,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:17,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:17,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:17,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:11:17,899 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:17,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1670682832, now seen corresponding path program 1 times [2024-06-27 19:11:17,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:17,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919128036] [2024-06-27 19:11:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:17,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:20,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:20,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919128036] [2024-06-27 19:11:20,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919128036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:20,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:20,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607267375] [2024-06-27 19:11:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:20,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:20,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:20,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 360 transitions, 5435 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:20,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:20,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:20,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:23,031 INFO L124 PetriNetUnfolderBase]: 6271/9790 cut-off events. [2024-06-27 19:11:23,031 INFO L125 PetriNetUnfolderBase]: For 392407/392407 co-relation queries the response was YES. [2024-06-27 19:11:23,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77521 conditions, 9790 events. 6271/9790 cut-off events. For 392407/392407 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 61859 event pairs, 1565 based on Foata normal form. 2/9652 useless extension candidates. Maximal degree in co-relation 77409. Up to 8830 conditions per place. [2024-06-27 19:11:23,175 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 369 selfloop transitions, 45 changer transitions 0/422 dead transitions. [2024-06-27 19:11:23,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 422 transitions, 6951 flow [2024-06-27 19:11:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:11:23,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:11:23,177 INFO L175 Difference]: Start difference. First operand has 240 places, 360 transitions, 5435 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:11:23,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 422 transitions, 6951 flow [2024-06-27 19:11:23,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 422 transitions, 6886 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:23,961 INFO L231 Difference]: Finished difference. Result has 245 places, 377 transitions, 5877 flow [2024-06-27 19:11:23,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5372, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5877, PETRI_PLACES=245, PETRI_TRANSITIONS=377} [2024-06-27 19:11:23,962 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 191 predicate places. [2024-06-27 19:11:23,962 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 377 transitions, 5877 flow [2024-06-27 19:11:23,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:23,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:23,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:23,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:11:23,962 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:23,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1664998672, now seen corresponding path program 2 times [2024-06-27 19:11:23,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:23,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88508416] [2024-06-27 19:11:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:23,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:25,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88508416] [2024-06-27 19:11:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88508416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:25,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:25,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269879027] [2024-06-27 19:11:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:25,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:25,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:25,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 377 transitions, 5877 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:25,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:25,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:25,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:29,026 INFO L124 PetriNetUnfolderBase]: 6412/10002 cut-off events. [2024-06-27 19:11:29,026 INFO L125 PetriNetUnfolderBase]: For 427528/427528 co-relation queries the response was YES. [2024-06-27 19:11:29,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81755 conditions, 10002 events. 6412/10002 cut-off events. For 427528/427528 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63348 event pairs, 1609 based on Foata normal form. 2/9863 useless extension candidates. Maximal degree in co-relation 81639. Up to 9107 conditions per place. [2024-06-27 19:11:29,139 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 385 selfloop transitions, 40 changer transitions 0/433 dead transitions. [2024-06-27 19:11:29,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 433 transitions, 7301 flow [2024-06-27 19:11:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:11:29,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 19:11:29,141 INFO L175 Difference]: Start difference. First operand has 245 places, 377 transitions, 5877 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:11:29,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 433 transitions, 7301 flow [2024-06-27 19:11:29,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 433 transitions, 7167 flow, removed 66 selfloop flow, removed 1 redundant places. [2024-06-27 19:11:29,997 INFO L231 Difference]: Finished difference. Result has 253 places, 387 transitions, 6061 flow [2024-06-27 19:11:29,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6061, PETRI_PLACES=253, PETRI_TRANSITIONS=387} [2024-06-27 19:11:29,997 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 199 predicate places. [2024-06-27 19:11:29,997 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 387 transitions, 6061 flow [2024-06-27 19:11:29,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:29,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:29,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:11:29,998 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:29,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -878091076, now seen corresponding path program 3 times [2024-06-27 19:11:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:29,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531676877] [2024-06-27 19:11:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:29,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:32,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:32,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531676877] [2024-06-27 19:11:32,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531676877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:32,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:32,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:32,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701317614] [2024-06-27 19:11:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:32,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:32,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 387 transitions, 6061 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:32,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:32,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:32,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:35,130 INFO L124 PetriNetUnfolderBase]: 6473/10116 cut-off events. [2024-06-27 19:11:35,131 INFO L125 PetriNetUnfolderBase]: For 443576/443576 co-relation queries the response was YES. [2024-06-27 19:11:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84553 conditions, 10116 events. 6473/10116 cut-off events. For 443576/443576 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 64521 event pairs, 1467 based on Foata normal form. 2/9964 useless extension candidates. Maximal degree in co-relation 84433. Up to 9241 conditions per place. [2024-06-27 19:11:35,280 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 391 selfloop transitions, 39 changer transitions 0/438 dead transitions. [2024-06-27 19:11:35,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 438 transitions, 7499 flow [2024-06-27 19:11:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:11:35,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 19:11:35,282 INFO L175 Difference]: Start difference. First operand has 253 places, 387 transitions, 6061 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:11:35,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 438 transitions, 7499 flow [2024-06-27 19:11:36,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 438 transitions, 7361 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:11:36,213 INFO L231 Difference]: Finished difference. Result has 258 places, 397 transitions, 6401 flow [2024-06-27 19:11:36,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5923, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6401, PETRI_PLACES=258, PETRI_TRANSITIONS=397} [2024-06-27 19:11:36,214 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 204 predicate places. [2024-06-27 19:11:36,214 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 397 transitions, 6401 flow [2024-06-27 19:11:36,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:36,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:36,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:11:36,214 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:36,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash -865710916, now seen corresponding path program 4 times [2024-06-27 19:11:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667910167] [2024-06-27 19:11:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:36,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667910167] [2024-06-27 19:11:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667910167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:38,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:38,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635211994] [2024-06-27 19:11:38,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:38,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:38,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:38,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 397 transitions, 6401 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:38,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:38,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:38,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:41,459 INFO L124 PetriNetUnfolderBase]: 6530/10198 cut-off events. [2024-06-27 19:11:41,459 INFO L125 PetriNetUnfolderBase]: For 465728/465728 co-relation queries the response was YES. [2024-06-27 19:11:41,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86526 conditions, 10198 events. 6530/10198 cut-off events. For 465728/465728 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 65243 event pairs, 1411 based on Foata normal form. 1/10038 useless extension candidates. Maximal degree in co-relation 86403. Up to 8984 conditions per place. [2024-06-27 19:11:41,586 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 365 selfloop transitions, 78 changer transitions 0/451 dead transitions. [2024-06-27 19:11:41,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 451 transitions, 7963 flow [2024-06-27 19:11:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:11:41,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 19:11:41,587 INFO L175 Difference]: Start difference. First operand has 258 places, 397 transitions, 6401 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:11:41,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 451 transitions, 7963 flow [2024-06-27 19:11:42,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 451 transitions, 7741 flow, removed 104 selfloop flow, removed 2 redundant places. [2024-06-27 19:11:42,372 INFO L231 Difference]: Finished difference. Result has 265 places, 409 transitions, 6650 flow [2024-06-27 19:11:42,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6650, PETRI_PLACES=265, PETRI_TRANSITIONS=409} [2024-06-27 19:11:42,373 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 211 predicate places. [2024-06-27 19:11:42,373 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 409 transitions, 6650 flow [2024-06-27 19:11:42,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:42,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:42,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:42,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:11:42,374 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:42,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash 505653632, now seen corresponding path program 5 times [2024-06-27 19:11:42,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498254607] [2024-06-27 19:11:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498254607] [2024-06-27 19:11:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498254607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:44,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811340937] [2024-06-27 19:11:44,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:44,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:44,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:44,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 409 transitions, 6650 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:44,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:44,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:44,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:47,517 INFO L124 PetriNetUnfolderBase]: 6556/10339 cut-off events. [2024-06-27 19:11:47,517 INFO L125 PetriNetUnfolderBase]: For 486433/486433 co-relation queries the response was YES. [2024-06-27 19:11:47,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88917 conditions, 10339 events. 6556/10339 cut-off events. For 486433/486433 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 66291 event pairs, 1585 based on Foata normal form. 2/10146 useless extension candidates. Maximal degree in co-relation 88790. Up to 9201 conditions per place. [2024-06-27 19:11:47,666 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 386 selfloop transitions, 65 changer transitions 0/459 dead transitions. [2024-06-27 19:11:47,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 459 transitions, 8334 flow [2024-06-27 19:11:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:11:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:11:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:11:47,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-27 19:11:47,668 INFO L175 Difference]: Start difference. First operand has 265 places, 409 transitions, 6650 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:11:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 459 transitions, 8334 flow [2024-06-27 19:11:48,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 459 transitions, 8252 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 19:11:48,746 INFO L231 Difference]: Finished difference. Result has 271 places, 421 transitions, 7072 flow [2024-06-27 19:11:48,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7072, PETRI_PLACES=271, PETRI_TRANSITIONS=421} [2024-06-27 19:11:48,746 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 217 predicate places. [2024-06-27 19:11:48,747 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 421 transitions, 7072 flow [2024-06-27 19:11:48,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:48,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:48,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:48,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:11:48,747 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:48,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1642400496, now seen corresponding path program 6 times [2024-06-27 19:11:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785393792] [2024-06-27 19:11:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:50,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785393792] [2024-06-27 19:11:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785393792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:50,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285802354] [2024-06-27 19:11:50,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:50,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:50,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 421 transitions, 7072 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:50,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:50,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:50,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:54,011 INFO L124 PetriNetUnfolderBase]: 6660/10365 cut-off events. [2024-06-27 19:11:54,011 INFO L125 PetriNetUnfolderBase]: For 519288/519288 co-relation queries the response was YES. [2024-06-27 19:11:54,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91938 conditions, 10365 events. 6660/10365 cut-off events. For 519288/519288 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 65863 event pairs, 1617 based on Foata normal form. 2/10213 useless extension candidates. Maximal degree in co-relation 91808. Up to 9410 conditions per place. [2024-06-27 19:11:54,180 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 418 selfloop transitions, 47 changer transitions 0/473 dead transitions. [2024-06-27 19:11:54,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 473 transitions, 8713 flow [2024-06-27 19:11:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 19:11:54,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 19:11:54,181 INFO L175 Difference]: Start difference. First operand has 271 places, 421 transitions, 7072 flow. Second operand 8 states and 184 transitions. [2024-06-27 19:11:54,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 473 transitions, 8713 flow [2024-06-27 19:11:55,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 473 transitions, 8494 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-27 19:11:55,445 INFO L231 Difference]: Finished difference. Result has 277 places, 434 transitions, 7314 flow [2024-06-27 19:11:55,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6877, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7314, PETRI_PLACES=277, PETRI_TRANSITIONS=434} [2024-06-27 19:11:55,446 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 223 predicate places. [2024-06-27 19:11:55,446 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 434 transitions, 7314 flow [2024-06-27 19:11:55,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:55,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:55,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:11:55,447 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:11:55,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -868557956, now seen corresponding path program 1 times [2024-06-27 19:11:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:55,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40031223] [2024-06-27 19:11:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40031223] [2024-06-27 19:11:58,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40031223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171114854] [2024-06-27 19:11:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:58,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:11:58,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 434 transitions, 7314 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:58,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:58,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:11:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:01,685 INFO L124 PetriNetUnfolderBase]: 6723/10765 cut-off events. [2024-06-27 19:12:01,685 INFO L125 PetriNetUnfolderBase]: For 573708/573910 co-relation queries the response was YES. [2024-06-27 19:12:01,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96872 conditions, 10765 events. 6723/10765 cut-off events. For 573708/573910 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 71328 event pairs, 1389 based on Foata normal form. 74/10635 useless extension candidates. Maximal degree in co-relation 96739. Up to 8814 conditions per place. [2024-06-27 19:12:01,852 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 419 selfloop transitions, 58 changer transitions 0/507 dead transitions. [2024-06-27 19:12:01,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 507 transitions, 9207 flow [2024-06-27 19:12:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 19:12:01,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-27 19:12:01,854 INFO L175 Difference]: Start difference. First operand has 277 places, 434 transitions, 7314 flow. Second operand 8 states and 212 transitions. [2024-06-27 19:12:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 507 transitions, 9207 flow [2024-06-27 19:12:03,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 507 transitions, 9033 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 19:12:03,267 INFO L231 Difference]: Finished difference. Result has 282 places, 437 transitions, 7404 flow [2024-06-27 19:12:03,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7155, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7404, PETRI_PLACES=282, PETRI_TRANSITIONS=437} [2024-06-27 19:12:03,268 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 228 predicate places. [2024-06-27 19:12:03,268 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 437 transitions, 7404 flow [2024-06-27 19:12:03,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:03,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:03,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:03,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:12:03,269 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:03,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -868497506, now seen corresponding path program 2 times [2024-06-27 19:12:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705924686] [2024-06-27 19:12:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:05,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705924686] [2024-06-27 19:12:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705924686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:05,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404938823] [2024-06-27 19:12:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:05,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:05,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:12:05,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 437 transitions, 7404 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:05,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:05,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:12:05,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:09,286 INFO L124 PetriNetUnfolderBase]: 6899/11069 cut-off events. [2024-06-27 19:12:09,286 INFO L125 PetriNetUnfolderBase]: For 591530/591726 co-relation queries the response was YES. [2024-06-27 19:12:09,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99567 conditions, 11069 events. 6899/11069 cut-off events. For 591530/591726 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 73914 event pairs, 1486 based on Foata normal form. 74/10930 useless extension candidates. Maximal degree in co-relation 99432. Up to 9386 conditions per place. [2024-06-27 19:12:09,425 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 413 selfloop transitions, 57 changer transitions 0/500 dead transitions. [2024-06-27 19:12:09,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 500 transitions, 9051 flow [2024-06-27 19:12:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:12:09,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-27 19:12:09,427 INFO L175 Difference]: Start difference. First operand has 282 places, 437 transitions, 7404 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:12:09,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 500 transitions, 9051 flow [2024-06-27 19:12:10,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 500 transitions, 8949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:12:10,689 INFO L231 Difference]: Finished difference. Result has 286 places, 438 transitions, 7452 flow [2024-06-27 19:12:10,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7452, PETRI_PLACES=286, PETRI_TRANSITIONS=438} [2024-06-27 19:12:10,690 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2024-06-27 19:12:10,690 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 438 transitions, 7452 flow [2024-06-27 19:12:10,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:10,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:10,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:10,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:12:10,691 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:10,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash 481595952, now seen corresponding path program 3 times [2024-06-27 19:12:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:10,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004557998] [2024-06-27 19:12:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:14,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004557998] [2024-06-27 19:12:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004557998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:14,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:14,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824900498] [2024-06-27 19:12:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:14,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:14,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:12:14,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 438 transitions, 7452 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:14,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:12:14,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:17,473 INFO L124 PetriNetUnfolderBase]: 7079/11229 cut-off events. [2024-06-27 19:12:17,473 INFO L125 PetriNetUnfolderBase]: For 605190/605493 co-relation queries the response was YES. [2024-06-27 19:12:17,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101565 conditions, 11229 events. 7079/11229 cut-off events. For 605190/605493 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 74657 event pairs, 1571 based on Foata normal form. 67/11108 useless extension candidates. Maximal degree in co-relation 101428. Up to 9678 conditions per place. [2024-06-27 19:12:18,032 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 421 selfloop transitions, 37 changer transitions 0/488 dead transitions. [2024-06-27 19:12:18,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 488 transitions, 8894 flow [2024-06-27 19:12:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:12:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:12:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:12:18,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:12:18,033 INFO L175 Difference]: Start difference. First operand has 286 places, 438 transitions, 7452 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:12:18,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 488 transitions, 8894 flow [2024-06-27 19:12:19,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 488 transitions, 8803 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:12:19,328 INFO L231 Difference]: Finished difference. Result has 289 places, 442 transitions, 7564 flow [2024-06-27 19:12:19,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7361, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7564, PETRI_PLACES=289, PETRI_TRANSITIONS=442} [2024-06-27 19:12:19,329 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 235 predicate places. [2024-06-27 19:12:19,329 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 442 transitions, 7564 flow [2024-06-27 19:12:19,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:19,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:19,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:19,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:12:19,329 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:19,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:19,330 INFO L85 PathProgramCache]: Analyzing trace with hash 991476988, now seen corresponding path program 4 times [2024-06-27 19:12:19,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:19,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570675193] [2024-06-27 19:12:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:19,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:22,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:22,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570675193] [2024-06-27 19:12:22,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570675193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:22,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:22,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395516683] [2024-06-27 19:12:22,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:22,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:12:22,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 442 transitions, 7564 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:22,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:22,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:12:22,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:25,691 INFO L124 PetriNetUnfolderBase]: 7247/11638 cut-off events. [2024-06-27 19:12:25,691 INFO L125 PetriNetUnfolderBase]: For 629768/630024 co-relation queries the response was YES. [2024-06-27 19:12:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104834 conditions, 11638 events. 7247/11638 cut-off events. For 629768/630024 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 78226 event pairs, 1719 based on Foata normal form. 85/11484 useless extension candidates. Maximal degree in co-relation 104695. Up to 9829 conditions per place. [2024-06-27 19:12:25,851 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 426 selfloop transitions, 42 changer transitions 0/498 dead transitions. [2024-06-27 19:12:25,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 498 transitions, 9127 flow [2024-06-27 19:12:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:12:25,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 19:12:25,853 INFO L175 Difference]: Start difference. First operand has 289 places, 442 transitions, 7564 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:12:25,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 498 transitions, 9127 flow [2024-06-27 19:12:27,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 498 transitions, 9027 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 19:12:27,145 INFO L231 Difference]: Finished difference. Result has 295 places, 449 transitions, 7813 flow [2024-06-27 19:12:27,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7476, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7813, PETRI_PLACES=295, PETRI_TRANSITIONS=449} [2024-06-27 19:12:27,146 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 241 predicate places. [2024-06-27 19:12:27,146 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 449 transitions, 7813 flow [2024-06-27 19:12:27,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:27,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:27,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:12:27,146 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:27,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1134172289, now seen corresponding path program 1 times [2024-06-27 19:12:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:27,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032612984] [2024-06-27 19:12:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032612984] [2024-06-27 19:12:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032612984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:30,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:30,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519381558] [2024-06-27 19:12:30,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:30,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:30,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:30,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 449 transitions, 7813 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:30,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:30,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:30,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:34,435 INFO L124 PetriNetUnfolderBase]: 7733/12141 cut-off events. [2024-06-27 19:12:34,435 INFO L125 PetriNetUnfolderBase]: For 640890/640890 co-relation queries the response was YES. [2024-06-27 19:12:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110397 conditions, 12141 events. 7733/12141 cut-off events. For 640890/640890 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 79781 event pairs, 1923 based on Foata normal form. 2/11931 useless extension candidates. Maximal degree in co-relation 110255. Up to 10770 conditions per place. [2024-06-27 19:12:34,714 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 437 selfloop transitions, 71 changer transitions 0/516 dead transitions. [2024-06-27 19:12:34,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 516 transitions, 9667 flow [2024-06-27 19:12:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:12:34,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:12:34,715 INFO L175 Difference]: Start difference. First operand has 295 places, 449 transitions, 7813 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:12:34,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 516 transitions, 9667 flow [2024-06-27 19:12:36,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 516 transitions, 9479 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 19:12:36,361 INFO L231 Difference]: Finished difference. Result has 299 places, 458 transitions, 8106 flow [2024-06-27 19:12:36,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8106, PETRI_PLACES=299, PETRI_TRANSITIONS=458} [2024-06-27 19:12:36,362 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 245 predicate places. [2024-06-27 19:12:36,362 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 458 transitions, 8106 flow [2024-06-27 19:12:36,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:36,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:36,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:12:36,362 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:36,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:36,363 INFO L85 PathProgramCache]: Analyzing trace with hash 395010763, now seen corresponding path program 2 times [2024-06-27 19:12:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087784156] [2024-06-27 19:12:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:39,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:39,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087784156] [2024-06-27 19:12:39,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087784156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:39,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:39,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491812190] [2024-06-27 19:12:39,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:39,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:39,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:39,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:39,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 458 transitions, 8106 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:39,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:39,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:39,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:43,513 INFO L124 PetriNetUnfolderBase]: 7802/12206 cut-off events. [2024-06-27 19:12:43,513 INFO L125 PetriNetUnfolderBase]: For 663279/663279 co-relation queries the response was YES. [2024-06-27 19:12:43,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112562 conditions, 12206 events. 7802/12206 cut-off events. For 663279/663279 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 79782 event pairs, 1933 based on Foata normal form. 2/12007 useless extension candidates. Maximal degree in co-relation 112418. Up to 11184 conditions per place. [2024-06-27 19:12:43,685 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 475 selfloop transitions, 30 changer transitions 0/513 dead transitions. [2024-06-27 19:12:43,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 513 transitions, 9608 flow [2024-06-27 19:12:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:12:43,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 19:12:43,687 INFO L175 Difference]: Start difference. First operand has 299 places, 458 transitions, 8106 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:12:43,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 513 transitions, 9608 flow [2024-06-27 19:12:45,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 513 transitions, 9372 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-27 19:12:45,116 INFO L231 Difference]: Finished difference. Result has 304 places, 465 transitions, 8142 flow [2024-06-27 19:12:45,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7874, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8142, PETRI_PLACES=304, PETRI_TRANSITIONS=465} [2024-06-27 19:12:45,116 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 250 predicate places. [2024-06-27 19:12:45,116 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 465 transitions, 8142 flow [2024-06-27 19:12:45,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:45,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:45,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:45,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:12:45,117 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:45,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -251558000, now seen corresponding path program 1 times [2024-06-27 19:12:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442640039] [2024-06-27 19:12:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:47,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:47,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442640039] [2024-06-27 19:12:47,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442640039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:47,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:47,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:47,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209102972] [2024-06-27 19:12:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:47,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:47,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 465 transitions, 8142 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:47,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:47,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:47,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:51,944 INFO L124 PetriNetUnfolderBase]: 7894/12348 cut-off events. [2024-06-27 19:12:51,945 INFO L125 PetriNetUnfolderBase]: For 688325/688325 co-relation queries the response was YES. [2024-06-27 19:12:52,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115155 conditions, 12348 events. 7894/12348 cut-off events. For 688325/688325 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 80657 event pairs, 1970 based on Foata normal form. 4/12145 useless extension candidates. Maximal degree in co-relation 115008. Up to 11278 conditions per place. [2024-06-27 19:12:52,147 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 480 selfloop transitions, 30 changer transitions 0/518 dead transitions. [2024-06-27 19:12:52,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 518 transitions, 9620 flow [2024-06-27 19:12:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:12:52,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973958333333333 [2024-06-27 19:12:52,149 INFO L175 Difference]: Start difference. First operand has 304 places, 465 transitions, 8142 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:12:52,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 518 transitions, 9620 flow [2024-06-27 19:12:53,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 518 transitions, 9466 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:12:53,783 INFO L231 Difference]: Finished difference. Result has 306 places, 469 transitions, 8203 flow [2024-06-27 19:12:53,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7988, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8203, PETRI_PLACES=306, PETRI_TRANSITIONS=469} [2024-06-27 19:12:53,784 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 252 predicate places. [2024-06-27 19:12:53,784 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 469 transitions, 8203 flow [2024-06-27 19:12:53,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:53,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:53,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:53,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:12:53,785 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 19:12:53,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1314039966, now seen corresponding path program 2 times [2024-06-27 19:12:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:53,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14683590] [2024-06-27 19:12:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:55,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14683590] [2024-06-27 19:12:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14683590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:55,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570980936] [2024-06-27 19:12:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:55,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:55,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 469 transitions, 8203 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:55,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:55,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:55,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand