./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe018_power.opt.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/safe018_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe018_power.opt.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:18:57,755 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:18:57,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:18:57,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:18:57,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:18:57,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:18:57,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:18:57,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:18:57,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:18:57,851 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:18:57,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:18:57,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:18:57,853 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:18:57,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:18:57,855 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:18:57,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:18:57,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:18:57,859 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:18:57,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:18:57,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:18:57,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:18:57,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:18:57,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:18:57,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:18:57,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:18:57,863 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:18:57,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:18:57,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:18:57,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:18:57,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:18:57,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:18:57,866 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:18:57,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:18:57,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:18:57,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:18:57,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:18:57,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:18:57,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:18:57,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:18:57,868 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:18:57,868 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:18:57,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:18:57,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:18:57,869 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:18:58,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:18:58,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:18:58,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:18:58,197 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:18:58,198 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:18:58,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe018_power.opt.yml/witness.yml [2024-06-27 21:18:58,432 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:18:58,432 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:18:58,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-27 21:18:59,619 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:18:59,871 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:18:59,872 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.opt.i [2024-06-27 21:18:59,884 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47465d66e/ecad76c8682f47b3b9876ffd0ed3509e/FLAGa69c840e3 [2024-06-27 21:18:59,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47465d66e/ecad76c8682f47b3b9876ffd0ed3509e [2024-06-27 21:18:59,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:18:59,898 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:18:59,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:18:59,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:18:59,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:18:59,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:18:58" (1/2) ... [2024-06-27 21:18:59,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f8b461 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:18:59, skipping insertion in model container [2024-06-27 21:18:59,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:18:58" (1/2) ... [2024-06-27 21:18:59,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d561c95 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:18:59, skipping insertion in model container [2024-06-27 21:18:59,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:18:59" (2/2) ... [2024-06-27 21:18:59,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f8b461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:18:59, skipping insertion in model container [2024-06-27 21:18:59,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:18:59" (2/2) ... [2024-06-27 21:18:59,909 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:19:00,057 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:19:00,058 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x$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_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_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 || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:19:00,058 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:19:00,059 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x$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_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_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 || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:19:00,059 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:19:00,059 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-27 21:19:00,106 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:19:00,564 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:19:00,574 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:19:00,724 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:19:00,761 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:19:00,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00 WrapperNode [2024-06-27 21:19:00,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:19:00,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:19:00,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:19:00,763 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:19:00,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,868 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 215 [2024-06-27 21:19:00,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:19:00,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:19:00,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:19:00,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:19:00,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,886 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,906 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 21:19:00,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:19:00,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:19:00,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:19:00,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:19:00,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (1/1) ... [2024-06-27 21:19:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:19:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:19:00,973 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 21:19:00,993 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 21:19:01,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:19:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:19:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:19:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:19:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:19:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:19:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:19:01,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:19:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:19:01,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:19:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:19:01,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:19:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:19:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:19:01,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:19:01,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:19:01,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:19:01,035 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 21:19:01,175 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:19:01,177 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:19:01,734 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:19:01,734 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:19:02,198 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:19:02,198 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:19:02,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:19:02 BoogieIcfgContainer [2024-06-27 21:19:02,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:19:02,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:19:02,202 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:19:02,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:19:02,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:18:58" (1/4) ... [2024-06-27 21:19:02,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d3d932 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:19:02, skipping insertion in model container [2024-06-27 21:19:02,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:18:59" (2/4) ... [2024-06-27 21:19:02,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d3d932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:19:02, skipping insertion in model container [2024-06-27 21:19:02,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:19:00" (3/4) ... [2024-06-27 21:19:02,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d3d932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:19:02, skipping insertion in model container [2024-06-27 21:19:02,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:19:02" (4/4) ... [2024-06-27 21:19:02,209 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.opt.i [2024-06-27 21:19:02,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:19:02,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:19:02,227 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:19:02,298 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:19:02,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:19:02,358 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 21:19:02,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:19:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:19:02,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 21:19:02,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 21:19:02,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:19:02,378 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;@64bf151e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:19:02,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:19:02,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:19:02,383 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:19:02,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:19:02,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:02,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:19:02,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:02,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash 814969817, now seen corresponding path program 1 times [2024-06-27 21:19:02,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:02,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747964943] [2024-06-27 21:19:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:04,212 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 21:19:04,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747964943] [2024-06-27 21:19:04,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747964943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:04,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:04,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:19:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083189904] [2024-06-27 21:19:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:04,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:19:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:19:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:19:04,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 21:19:04,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 21:19:04,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:04,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 21:19:04,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:04,878 INFO L124 PetriNetUnfolderBase]: 897/1380 cut-off events. [2024-06-27 21:19:04,878 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-06-27 21:19:04,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1380 events. 897/1380 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6406 event pairs, 455 based on Foata normal form. 2/1359 useless extension candidates. Maximal degree in co-relation 2795. Up to 1343 conditions per place. [2024-06-27 21:19:04,894 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:19:04,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 183 flow [2024-06-27 21:19:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:19:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:19:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-27 21:19:04,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-27 21:19:04,905 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-27 21:19:04,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 183 flow [2024-06-27 21:19:04,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:19:04,910 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 21:19:04,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 21:19:04,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 21:19:04,917 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 21:19:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 21:19:04,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:04,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:19:04,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:04,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2105199670, now seen corresponding path program 1 times [2024-06-27 21:19:04,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105676245] [2024-06-27 21:19:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:07,973 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 21:19:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105676245] [2024-06-27 21:19:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105676245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:07,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:07,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:19:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110741802] [2024-06-27 21:19:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:07,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:19:07,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:19:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:19:07,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:07,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 21:19:07,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:07,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:07,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:08,783 INFO L124 PetriNetUnfolderBase]: 1139/1737 cut-off events. [2024-06-27 21:19:08,783 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2024-06-27 21:19:08,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1737 events. 1139/1737 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7835 event pairs, 393 based on Foata normal form. 6/1741 useless extension candidates. Maximal degree in co-relation 4008. Up to 1639 conditions per place. [2024-06-27 21:19:08,795 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 42 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2024-06-27 21:19:08,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 240 flow [2024-06-27 21:19:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:19:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:19:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-06-27 21:19:08,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-27 21:19:08,798 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 83 transitions. [2024-06-27 21:19:08,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 240 flow [2024-06-27 21:19:08,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:19:08,800 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-27 21:19:08,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-27 21:19:08,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-27 21:19:08,802 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-27 21:19:08,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 21:19:08,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:08,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:08,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:19:08,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:08,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1682329544, now seen corresponding path program 1 times [2024-06-27 21:19:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592741886] [2024-06-27 21:19:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:10,275 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 21:19:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592741886] [2024-06-27 21:19:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592741886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:10,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:19:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2217809] [2024-06-27 21:19:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:10,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:19:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:19:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:19:10,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:10,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 21:19:10,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:10,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:10,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:10,903 INFO L124 PetriNetUnfolderBase]: 896/1390 cut-off events. [2024-06-27 21:19:10,903 INFO L125 PetriNetUnfolderBase]: For 756/756 co-relation queries the response was YES. [2024-06-27 21:19:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1390 events. 896/1390 cut-off events. For 756/756 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6450 event pairs, 389 based on Foata normal form. 4/1392 useless extension candidates. Maximal degree in co-relation 3495. Up to 1337 conditions per place. [2024-06-27 21:19:10,912 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-27 21:19:10,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 289 flow [2024-06-27 21:19:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:19:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:19:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 21:19:10,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 21:19:10,915 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 89 transitions. [2024-06-27 21:19:10,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 289 flow [2024-06-27 21:19:10,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 272 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:19:10,918 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-27 21:19:10,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-27 21:19:10,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-27 21:19:10,920 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-27 21:19:10,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 21:19:10,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:10,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:10,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:19:10,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:10,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:10,921 INFO L85 PathProgramCache]: Analyzing trace with hash 626909611, now seen corresponding path program 1 times [2024-06-27 21:19:10,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:10,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713502852] [2024-06-27 21:19:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:10,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:12,919 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 21:19:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713502852] [2024-06-27 21:19:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713502852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:12,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:19:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977888298] [2024-06-27 21:19:12,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:12,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:19:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:19:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:19:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:12,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 21:19:12,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:12,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:12,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:13,581 INFO L124 PetriNetUnfolderBase]: 904/1402 cut-off events. [2024-06-27 21:19:13,581 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2024-06-27 21:19:13,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1402 events. 904/1402 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6465 event pairs, 371 based on Foata normal form. 4/1404 useless extension candidates. Maximal degree in co-relation 4039. Up to 1327 conditions per place. [2024-06-27 21:19:13,590 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 49 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-06-27 21:19:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 364 flow [2024-06-27 21:19:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:19:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:19:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:19:13,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 21:19:13,595 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:19:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 364 flow [2024-06-27 21:19:13,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 350 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:19:13,601 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 219 flow [2024-06-27 21:19:13,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:19:13,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-27 21:19:13,603 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 219 flow [2024-06-27 21:19:13,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 21:19:13,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:13,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:13,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:19:13,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:13,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2040636889, now seen corresponding path program 1 times [2024-06-27 21:19:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:13,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434819060] [2024-06-27 21:19:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:16,106 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 21:19:16,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:16,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434819060] [2024-06-27 21:19:16,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434819060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:16,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:16,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:19:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142242150] [2024-06-27 21:19:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:16,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:19:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:19:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:19:16,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:16,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 21:19:16,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:16,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:16,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:16,953 INFO L124 PetriNetUnfolderBase]: 984/1538 cut-off events. [2024-06-27 21:19:16,953 INFO L125 PetriNetUnfolderBase]: For 2682/2682 co-relation queries the response was YES. [2024-06-27 21:19:16,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4965 conditions, 1538 events. 984/1538 cut-off events. For 2682/2682 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7253 event pairs, 364 based on Foata normal form. 24/1560 useless extension candidates. Maximal degree in co-relation 4945. Up to 1295 conditions per place. [2024-06-27 21:19:16,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-27 21:19:16,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 465 flow [2024-06-27 21:19:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:19:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:19:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:19:16,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:19:16,968 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 219 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:19:16,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 465 flow [2024-06-27 21:19:16,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 78 transitions, 434 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:16,977 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 245 flow [2024-06-27 21:19:16,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 21:19:16,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 21:19:16,978 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 245 flow [2024-06-27 21:19:16,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 21:19:16,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:16,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:19:16,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:16,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2020386898, now seen corresponding path program 1 times [2024-06-27 21:19:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:16,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621575108] [2024-06-27 21:19:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:19,031 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 21:19:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621575108] [2024-06-27 21:19:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621575108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:19:19,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352975075] [2024-06-27 21:19:19,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:19:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:19:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:19:19,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:19,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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 21:19:19,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:19,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:19,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:19,874 INFO L124 PetriNetUnfolderBase]: 1212/1870 cut-off events. [2024-06-27 21:19:19,875 INFO L125 PetriNetUnfolderBase]: For 3940/3940 co-relation queries the response was YES. [2024-06-27 21:19:19,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 1870 events. 1212/1870 cut-off events. For 3940/3940 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8742 event pairs, 414 based on Foata normal form. 2/1870 useless extension candidates. Maximal degree in co-relation 6173. Up to 1754 conditions per place. [2024-06-27 21:19:19,889 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 51 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-06-27 21:19:19,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 443 flow [2024-06-27 21:19:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:19:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:19:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 21:19:19,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-27 21:19:19,892 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 245 flow. Second operand 5 states and 88 transitions. [2024-06-27 21:19:19,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 443 flow [2024-06-27 21:19:19,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 416 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:19,898 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 286 flow [2024-06-27 21:19:19,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 21:19:19,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-27 21:19:19,901 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 286 flow [2024-06-27 21:19:19,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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 21:19:19,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:19,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:19,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:19:19,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:19,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash -435555191, now seen corresponding path program 1 times [2024-06-27 21:19:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:19,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318532332] [2024-06-27 21:19:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:22,616 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 21:19:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318532332] [2024-06-27 21:19:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318532332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:22,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:22,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:22,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322747030] [2024-06-27 21:19:22,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:22,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:22,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:22,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:22,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:22,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:22,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 286 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:22,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:22,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:22,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:23,558 INFO L124 PetriNetUnfolderBase]: 1225/1895 cut-off events. [2024-06-27 21:19:23,558 INFO L125 PetriNetUnfolderBase]: For 5295/5295 co-relation queries the response was YES. [2024-06-27 21:19:23,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6657 conditions, 1895 events. 1225/1895 cut-off events. For 5295/5295 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8876 event pairs, 396 based on Foata normal form. 2/1895 useless extension candidates. Maximal degree in co-relation 6635. Up to 1723 conditions per place. [2024-06-27 21:19:23,572 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-27 21:19:23,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 520 flow [2024-06-27 21:19:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:19:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:19:23,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 21:19:23,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 21:19:23,575 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 286 flow. Second operand 6 states and 105 transitions. [2024-06-27 21:19:23,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 520 flow [2024-06-27 21:19:23,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 496 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:19:23,580 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 349 flow [2024-06-27 21:19:23,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 21:19:23,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 21:19:23,582 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 349 flow [2024-06-27 21:19:23,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:23,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:23,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:23,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:19:23,583 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:23,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:23,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2055435345, now seen corresponding path program 2 times [2024-06-27 21:19:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:23,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141211724] [2024-06-27 21:19:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:23,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:26,078 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 21:19:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:26,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141211724] [2024-06-27 21:19:26,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141211724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:26,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662824814] [2024-06-27 21:19:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:26,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:26,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:26,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:26,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 349 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:26,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:26,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:26,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:27,206 INFO L124 PetriNetUnfolderBase]: 1220/1888 cut-off events. [2024-06-27 21:19:27,206 INFO L125 PetriNetUnfolderBase]: For 6900/6900 co-relation queries the response was YES. [2024-06-27 21:19:27,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7119 conditions, 1888 events. 1220/1888 cut-off events. For 6900/6900 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8864 event pairs, 396 based on Foata normal form. 2/1888 useless extension candidates. Maximal degree in co-relation 7096. Up to 1705 conditions per place. [2024-06-27 21:19:27,223 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 23 changer transitions 0/85 dead transitions. [2024-06-27 21:19:27,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 617 flow [2024-06-27 21:19:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:19:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:19:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:19:27,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-27 21:19:27,228 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 349 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:19:27,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 617 flow [2024-06-27 21:19:27,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 570 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:27,235 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 396 flow [2024-06-27 21:19:27,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-27 21:19:27,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-27 21:19:27,238 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 396 flow [2024-06-27 21:19:27,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:27,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:27,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:27,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:19:27,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:27,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 991364406, now seen corresponding path program 1 times [2024-06-27 21:19:27,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:27,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759940465] [2024-06-27 21:19:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:29,320 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 21:19:29,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759940465] [2024-06-27 21:19:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759940465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:29,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:29,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:19:29,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737260135] [2024-06-27 21:19:29,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:29,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:19:29,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:19:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:19:29,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:29,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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 21:19:29,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:29,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:30,108 INFO L124 PetriNetUnfolderBase]: 981/1534 cut-off events. [2024-06-27 21:19:30,108 INFO L125 PetriNetUnfolderBase]: For 7445/7445 co-relation queries the response was YES. [2024-06-27 21:19:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1534 events. 981/1534 cut-off events. For 7445/7445 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7315 event pairs, 350 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 6333. Up to 1477 conditions per place. [2024-06-27 21:19:30,118 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 56 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-06-27 21:19:30,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 582 flow [2024-06-27 21:19:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:19:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:19:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:19:30,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:19:30,120 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 396 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:19:30,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 582 flow [2024-06-27 21:19:30,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 512 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:30,127 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 381 flow [2024-06-27 21:19:30,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-27 21:19:30,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-27 21:19:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 381 flow [2024-06-27 21:19:30,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 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 21:19:30,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:30,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:30,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:19:30,128 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:30,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2123932139, now seen corresponding path program 1 times [2024-06-27 21:19:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:30,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055912342] [2024-06-27 21:19:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:32,089 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 21:19:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055912342] [2024-06-27 21:19:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055912342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:32,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:32,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215701451] [2024-06-27 21:19:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:32,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:32,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 381 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:32,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:32,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:32,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:32,987 INFO L124 PetriNetUnfolderBase]: 1279/1992 cut-off events. [2024-06-27 21:19:32,987 INFO L125 PetriNetUnfolderBase]: For 10694/10694 co-relation queries the response was YES. [2024-06-27 21:19:32,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 1992 events. 1279/1992 cut-off events. For 10694/10694 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9421 event pairs, 230 based on Foata normal form. 16/2006 useless extension candidates. Maximal degree in co-relation 8108. Up to 1770 conditions per place. [2024-06-27 21:19:32,998 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-27 21:19:32,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 631 flow [2024-06-27 21:19:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:19:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:19:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:19:33,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-27 21:19:33,006 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 381 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:19:33,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 631 flow [2024-06-27 21:19:33,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 602 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:19:33,017 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 398 flow [2024-06-27 21:19:33,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 21:19:33,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-27 21:19:33,019 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 398 flow [2024-06-27 21:19:33,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:33,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:33,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:33,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:19:33,020 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:33,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash -617312343, now seen corresponding path program 2 times [2024-06-27 21:19:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012308872] [2024-06-27 21:19:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:35,236 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 21:19:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:35,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012308872] [2024-06-27 21:19:35,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012308872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:35,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:35,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:19:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258867368] [2024-06-27 21:19:35,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:19:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:19:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:19:35,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:35,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 398 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:35,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:35,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:35,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:36,058 INFO L124 PetriNetUnfolderBase]: 1271/1980 cut-off events. [2024-06-27 21:19:36,058 INFO L125 PetriNetUnfolderBase]: For 11617/11617 co-relation queries the response was YES. [2024-06-27 21:19:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8236 conditions, 1980 events. 1271/1980 cut-off events. For 11617/11617 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9400 event pairs, 391 based on Foata normal form. 4/1982 useless extension candidates. Maximal degree in co-relation 8210. Up to 1814 conditions per place. [2024-06-27 21:19:36,068 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-27 21:19:36,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 660 flow [2024-06-27 21:19:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:19:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:19:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:19:36,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-27 21:19:36,069 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 398 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:19:36,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 660 flow [2024-06-27 21:19:36,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 636 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:36,076 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 457 flow [2024-06-27 21:19:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 21:19:36,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-27 21:19:36,077 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 457 flow [2024-06-27 21:19:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 21:19:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:36,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:19:36,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:36,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash -617307383, now seen corresponding path program 1 times [2024-06-27 21:19:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673834977] [2024-06-27 21:19:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:38,760 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 21:19:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673834977] [2024-06-27 21:19:38,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673834977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:38,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:38,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:38,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714548332] [2024-06-27 21:19:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:38,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:38,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:38,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 457 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:38,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:38,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:38,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:39,962 INFO L124 PetriNetUnfolderBase]: 1339/2108 cut-off events. [2024-06-27 21:19:39,962 INFO L125 PetriNetUnfolderBase]: For 14788/14788 co-relation queries the response was YES. [2024-06-27 21:19:39,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 2108 events. 1339/2108 cut-off events. For 14788/14788 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10331 event pairs, 360 based on Foata normal form. 16/2122 useless extension candidates. Maximal degree in co-relation 9063. Up to 1778 conditions per place. [2024-06-27 21:19:39,974 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-27 21:19:39,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 825 flow [2024-06-27 21:19:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:19:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:19:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:19:39,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 21:19:39,976 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 457 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:19:39,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 825 flow [2024-06-27 21:19:39,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 768 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:39,989 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 560 flow [2024-06-27 21:19:39,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-27 21:19:39,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-27 21:19:39,990 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 560 flow [2024-06-27 21:19:39,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:39,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:39,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:39,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:19:39,991 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:39,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 706021905, now seen corresponding path program 2 times [2024-06-27 21:19:39,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:39,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580894763] [2024-06-27 21:19:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:42,442 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 21:19:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580894763] [2024-06-27 21:19:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580894763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:42,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:42,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:42,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647299441] [2024-06-27 21:19:42,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:42,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:42,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:42,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:42,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:42,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 560 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:42,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:42,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:42,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:43,579 INFO L124 PetriNetUnfolderBase]: 1503/2392 cut-off events. [2024-06-27 21:19:43,579 INFO L125 PetriNetUnfolderBase]: For 18946/18946 co-relation queries the response was YES. [2024-06-27 21:19:43,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10733 conditions, 2392 events. 1503/2392 cut-off events. For 18946/18946 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12150 event pairs, 406 based on Foata normal form. 12/2402 useless extension candidates. Maximal degree in co-relation 10703. Up to 1685 conditions per place. [2024-06-27 21:19:43,596 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 32 changer transitions 0/116 dead transitions. [2024-06-27 21:19:43,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 1022 flow [2024-06-27 21:19:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:19:43,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 21:19:43,598 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 560 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:19:43,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 1022 flow [2024-06-27 21:19:43,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 116 transitions, 958 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:43,625 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 644 flow [2024-06-27 21:19:43,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-06-27 21:19:43,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 21:19:43,626 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 644 flow [2024-06-27 21:19:43,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:43,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:43,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:19:43,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:43,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash 706015395, now seen corresponding path program 3 times [2024-06-27 21:19:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062523753] [2024-06-27 21:19:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:46,134 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 21:19:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062523753] [2024-06-27 21:19:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062523753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:46,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:46,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894102568] [2024-06-27 21:19:46,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:46,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:46,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:46,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:46,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 644 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:46,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:46,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:46,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:47,132 INFO L124 PetriNetUnfolderBase]: 1475/2348 cut-off events. [2024-06-27 21:19:47,132 INFO L125 PetriNetUnfolderBase]: For 20484/20484 co-relation queries the response was YES. [2024-06-27 21:19:47,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10587 conditions, 2348 events. 1475/2348 cut-off events. For 20484/20484 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11938 event pairs, 453 based on Foata normal form. 16/2362 useless extension candidates. Maximal degree in co-relation 10555. Up to 2041 conditions per place. [2024-06-27 21:19:47,177 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 78 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-27 21:19:47,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 960 flow [2024-06-27 21:19:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:19:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:19:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:19:47,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-27 21:19:47,179 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 644 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:19:47,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 960 flow [2024-06-27 21:19:47,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 110 transitions, 910 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:19:47,207 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 657 flow [2024-06-27 21:19:47,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=657, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-06-27 21:19:47,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-27 21:19:47,208 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 657 flow [2024-06-27 21:19:47,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:47,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:47,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:19:47,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:19:47,209 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:47,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash 667527888, now seen corresponding path program 1 times [2024-06-27 21:19:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:47,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5454043] [2024-06-27 21:19:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:49,315 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 21:19:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:49,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5454043] [2024-06-27 21:19:49,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5454043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:49,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:49,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:19:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914091976] [2024-06-27 21:19:49,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:49,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:19:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:19:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:19:49,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:49,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 657 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 21:19:49,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:49,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:49,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:50,313 INFO L124 PetriNetUnfolderBase]: 1469/2342 cut-off events. [2024-06-27 21:19:50,314 INFO L125 PetriNetUnfolderBase]: For 20408/20408 co-relation queries the response was YES. [2024-06-27 21:19:50,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10683 conditions, 2342 events. 1469/2342 cut-off events. For 20408/20408 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11939 event pairs, 433 based on Foata normal form. 2/2343 useless extension candidates. Maximal degree in co-relation 10649. Up to 2285 conditions per place. [2024-06-27 21:19:50,328 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 21:19:50,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 95 transitions, 915 flow [2024-06-27 21:19:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:19:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:19:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-27 21:19:50,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-27 21:19:50,330 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 657 flow. Second operand 6 states and 91 transitions. [2024-06-27 21:19:50,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 95 transitions, 915 flow [2024-06-27 21:19:50,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 854 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:19:50,367 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 694 flow [2024-06-27 21:19:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-27 21:19:50,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 21:19:50,368 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 694 flow [2024-06-27 21:19:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 21:19:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:50,368 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 21:19:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:19:50,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:50,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash 941465456, now seen corresponding path program 1 times [2024-06-27 21:19:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:50,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174878812] [2024-06-27 21:19:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:50,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:53,082 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 21:19:53,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:53,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174878812] [2024-06-27 21:19:53,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174878812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:53,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:53,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:19:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149087986] [2024-06-27 21:19:53,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:53,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:19:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:19:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:19:53,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:19:53,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 694 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:53,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:53,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:19:53,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:54,030 INFO L124 PetriNetUnfolderBase]: 1449/2308 cut-off events. [2024-06-27 21:19:54,031 INFO L125 PetriNetUnfolderBase]: For 21447/21447 co-relation queries the response was YES. [2024-06-27 21:19:54,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10622 conditions, 2308 events. 1449/2308 cut-off events. For 21447/21447 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11710 event pairs, 419 based on Foata normal form. 12/2318 useless extension candidates. Maximal degree in co-relation 10585. Up to 2079 conditions per place. [2024-06-27 21:19:54,043 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 18 changer transitions 0/112 dead transitions. [2024-06-27 21:19:54,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 962 flow [2024-06-27 21:19:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:19:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:19:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:19:54,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-27 21:19:54,045 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 694 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:19:54,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 962 flow [2024-06-27 21:19:54,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 954 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 21:19:54,073 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 707 flow [2024-06-27 21:19:54,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=707, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2024-06-27 21:19:54,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-27 21:19:54,074 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 707 flow [2024-06-27 21:19:54,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 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 21:19:54,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:54,074 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 21:19:54,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:19:54,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:54,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:54,075 INFO L85 PathProgramCache]: Analyzing trace with hash -786238091, now seen corresponding path program 1 times [2024-06-27 21:19:54,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:54,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528655039] [2024-06-27 21:19:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:54,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:56,758 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 21:19:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:56,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528655039] [2024-06-27 21:19:56,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528655039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:56,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:56,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:19:56,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657802572] [2024-06-27 21:19:56,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:19:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:19:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:19:56,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:56,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 707 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 21:19:56,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:56,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:56,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:19:57,419 INFO L124 PetriNetUnfolderBase]: 1384/2248 cut-off events. [2024-06-27 21:19:57,420 INFO L125 PetriNetUnfolderBase]: For 23111/23111 co-relation queries the response was YES. [2024-06-27 21:19:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10721 conditions, 2248 events. 1384/2248 cut-off events. For 23111/23111 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11566 event pairs, 417 based on Foata normal form. 6/2252 useless extension candidates. Maximal degree in co-relation 10680. Up to 2134 conditions per place. [2024-06-27 21:19:57,432 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-06-27 21:19:57,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 979 flow [2024-06-27 21:19:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:19:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:19:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:19:57,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-27 21:19:57,434 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 707 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:19:57,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 979 flow [2024-06-27 21:19:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 909 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:19:57,460 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 723 flow [2024-06-27 21:19:57,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-06-27 21:19:57,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-27 21:19:57,461 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 723 flow [2024-06-27 21:19:57,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 21:19:57,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:19:57,461 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 21:19:57,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:19:57,462 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:19:57,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:19:57,462 INFO L85 PathProgramCache]: Analyzing trace with hash -781476491, now seen corresponding path program 2 times [2024-06-27 21:19:57,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:19:57,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307448254] [2024-06-27 21:19:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:19:57,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:19:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:19:59,737 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 21:19:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:19:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307448254] [2024-06-27 21:19:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307448254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:19:59,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:19:59,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:19:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048387336] [2024-06-27 21:19:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:19:59,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:19:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:19:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:19:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:19:59,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:19:59,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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 21:19:59,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:19:59,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:19:59,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:00,550 INFO L124 PetriNetUnfolderBase]: 1384/2241 cut-off events. [2024-06-27 21:20:00,550 INFO L125 PetriNetUnfolderBase]: For 24979/24979 co-relation queries the response was YES. [2024-06-27 21:20:00,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11020 conditions, 2241 events. 1384/2241 cut-off events. For 24979/24979 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11572 event pairs, 426 based on Foata normal form. 3/2241 useless extension candidates. Maximal degree in co-relation 10979. Up to 2144 conditions per place. [2024-06-27 21:20:00,560 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 78 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2024-06-27 21:20:00,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 995 flow [2024-06-27 21:20:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:20:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:20:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 21:20:00,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-27 21:20:00,562 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 723 flow. Second operand 6 states and 97 transitions. [2024-06-27 21:20:00,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 995 flow [2024-06-27 21:20:00,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 103 transitions, 943 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:20:00,585 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 750 flow [2024-06-27 21:20:00,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=750, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2024-06-27 21:20:00,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 21:20:00,586 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 750 flow [2024-06-27 21:20:00,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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 21:20:00,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:00,586 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 21:20:00,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:20:00,586 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:00,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:00,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1532808527, now seen corresponding path program 1 times [2024-06-27 21:20:00,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:00,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866530735] [2024-06-27 21:20:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:00,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:02,793 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 21:20:02,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:02,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866530735] [2024-06-27 21:20:02,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866530735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:02,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:02,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:02,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172541588] [2024-06-27 21:20:02,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:02,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:02,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:02,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:02,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 750 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:02,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:02,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:02,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:03,950 INFO L124 PetriNetUnfolderBase]: 1498/2381 cut-off events. [2024-06-27 21:20:03,950 INFO L125 PetriNetUnfolderBase]: For 28004/28004 co-relation queries the response was YES. [2024-06-27 21:20:03,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11827 conditions, 2381 events. 1498/2381 cut-off events. For 28004/28004 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12166 event pairs, 433 based on Foata normal form. 4/2383 useless extension candidates. Maximal degree in co-relation 11785. Up to 2258 conditions per place. [2024-06-27 21:20:03,961 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-27 21:20:03,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 107 transitions, 1042 flow [2024-06-27 21:20:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:20:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:20:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 21:20:03,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:20:03,963 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 750 flow. Second operand 6 states and 96 transitions. [2024-06-27 21:20:03,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 107 transitions, 1042 flow [2024-06-27 21:20:03,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 107 transitions, 993 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:20:03,983 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 791 flow [2024-06-27 21:20:03,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=791, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2024-06-27 21:20:03,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-27 21:20:03,984 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 791 flow [2024-06-27 21:20:03,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:03,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:03,984 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 21:20:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:20:03,985 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:03,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -178864507, now seen corresponding path program 2 times [2024-06-27 21:20:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536504765] [2024-06-27 21:20:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:06,037 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 21:20:06,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:06,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536504765] [2024-06-27 21:20:06,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536504765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:06,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:06,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:06,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980666461] [2024-06-27 21:20:06,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:06,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:06,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:06,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:06,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:06,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:07,207 INFO L124 PetriNetUnfolderBase]: 1486/2365 cut-off events. [2024-06-27 21:20:07,207 INFO L125 PetriNetUnfolderBase]: For 29903/29903 co-relation queries the response was YES. [2024-06-27 21:20:07,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12044 conditions, 2365 events. 1486/2365 cut-off events. For 29903/29903 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12091 event pairs, 431 based on Foata normal form. 4/2367 useless extension candidates. Maximal degree in co-relation 12001. Up to 2226 conditions per place. [2024-06-27 21:20:07,218 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 86 selfloop transitions, 23 changer transitions 0/113 dead transitions. [2024-06-27 21:20:07,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 113 transitions, 1117 flow [2024-06-27 21:20:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:20:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:20:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:20:07,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-27 21:20:07,220 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 791 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:20:07,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 113 transitions, 1117 flow [2024-06-27 21:20:07,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 113 transitions, 1055 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:20:07,246 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 827 flow [2024-06-27 21:20:07,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=827, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2024-06-27 21:20:07,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 21:20:07,247 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 827 flow [2024-06-27 21:20:07,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:07,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:07,247 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 21:20:07,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:20:07,247 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:07,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1396334964, now seen corresponding path program 1 times [2024-06-27 21:20:07,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:07,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780759949] [2024-06-27 21:20:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:07,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:09,460 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 21:20:09,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:09,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780759949] [2024-06-27 21:20:09,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780759949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:09,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:09,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92443438] [2024-06-27 21:20:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:09,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:09,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:09,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:20:09,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 827 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 21:20:09,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:09,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:20:09,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:10,305 INFO L124 PetriNetUnfolderBase]: 1397/2269 cut-off events. [2024-06-27 21:20:10,305 INFO L125 PetriNetUnfolderBase]: For 30485/30487 co-relation queries the response was YES. [2024-06-27 21:20:10,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11850 conditions, 2269 events. 1397/2269 cut-off events. For 30485/30487 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11730 event pairs, 415 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 11806. Up to 2135 conditions per place. [2024-06-27 21:20:10,317 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-27 21:20:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1271 flow [2024-06-27 21:20:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:20:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:20:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:20:10,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-27 21:20:10,319 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 827 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:20:10,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1271 flow [2024-06-27 21:20:10,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1199 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:10,342 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 958 flow [2024-06-27 21:20:10,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=958, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2024-06-27 21:20:10,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-27 21:20:10,342 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 958 flow [2024-06-27 21:20:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 21:20:10,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:10,342 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 21:20:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:20:10,343 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:10,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1396425329, now seen corresponding path program 1 times [2024-06-27 21:20:10,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562506006] [2024-06-27 21:20:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:12,753 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 21:20:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562506006] [2024-06-27 21:20:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562506006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:12,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:12,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335689617] [2024-06-27 21:20:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:12,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:12,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 958 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:12,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:12,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:12,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:13,437 INFO L124 PetriNetUnfolderBase]: 1506/2395 cut-off events. [2024-06-27 21:20:13,437 INFO L125 PetriNetUnfolderBase]: For 33305/33305 co-relation queries the response was YES. [2024-06-27 21:20:13,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12674 conditions, 2395 events. 1506/2395 cut-off events. For 33305/33305 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12275 event pairs, 416 based on Foata normal form. 2/2396 useless extension candidates. Maximal degree in co-relation 12627. Up to 2323 conditions per place. [2024-06-27 21:20:13,451 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-06-27 21:20:13,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 134 transitions, 1327 flow [2024-06-27 21:20:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:20:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:20:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-27 21:20:13,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:20:13,453 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 958 flow. Second operand 7 states and 105 transitions. [2024-06-27 21:20:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 134 transitions, 1327 flow [2024-06-27 21:20:13,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 1275 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-27 21:20:13,483 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 1029 flow [2024-06-27 21:20:13,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1029, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2024-06-27 21:20:13,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 21:20:13,484 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 1029 flow [2024-06-27 21:20:13,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:13,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:13,484 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 21:20:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:20:13,485 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:13,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1076500599, now seen corresponding path program 2 times [2024-06-27 21:20:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:13,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382042908] [2024-06-27 21:20:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:13,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:15,687 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 21:20:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382042908] [2024-06-27 21:20:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382042908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:15,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:15,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:15,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419349546] [2024-06-27 21:20:15,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:15,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:15,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:15,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:15,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 1029 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:16,656 INFO L124 PetriNetUnfolderBase]: 1516/2409 cut-off events. [2024-06-27 21:20:16,656 INFO L125 PetriNetUnfolderBase]: For 35890/35890 co-relation queries the response was YES. [2024-06-27 21:20:16,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13121 conditions, 2409 events. 1516/2409 cut-off events. For 35890/35890 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12303 event pairs, 410 based on Foata normal form. 2/2410 useless extension candidates. Maximal degree in co-relation 13069. Up to 2340 conditions per place. [2024-06-27 21:20:16,671 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2024-06-27 21:20:16,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 135 transitions, 1356 flow [2024-06-27 21:20:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-27 21:20:16,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3353658536585366 [2024-06-27 21:20:16,672 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 1029 flow. Second operand 8 states and 110 transitions. [2024-06-27 21:20:16,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 135 transitions, 1356 flow [2024-06-27 21:20:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 1315 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 21:20:16,726 INFO L231 Difference]: Finished difference. Result has 114 places, 122 transitions, 1072 flow [2024-06-27 21:20:16,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1072, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2024-06-27 21:20:16,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-27 21:20:16,726 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 1072 flow [2024-06-27 21:20:16,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:16,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:16,727 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 21:20:16,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:20:16,727 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:16,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1544034774, now seen corresponding path program 2 times [2024-06-27 21:20:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:16,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452970313] [2024-06-27 21:20:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:19,760 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 21:20:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452970313] [2024-06-27 21:20:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452970313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:19,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799441020] [2024-06-27 21:20:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:19,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:19,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:20:19,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 1072 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 21:20:19,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:19,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:20:19,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:20,625 INFO L124 PetriNetUnfolderBase]: 1450/2325 cut-off events. [2024-06-27 21:20:20,626 INFO L125 PetriNetUnfolderBase]: For 38149/38152 co-relation queries the response was YES. [2024-06-27 21:20:20,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13040 conditions, 2325 events. 1450/2325 cut-off events. For 38149/38152 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11996 event pairs, 422 based on Foata normal form. 3/2320 useless extension candidates. Maximal degree in co-relation 12985. Up to 2175 conditions per place. [2024-06-27 21:20:20,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 27 changer transitions 0/137 dead transitions. [2024-06-27 21:20:20,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 137 transitions, 1396 flow [2024-06-27 21:20:20,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:20:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:20:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:20:20,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-27 21:20:20,640 INFO L175 Difference]: Start difference. First operand has 114 places, 122 transitions, 1072 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:20:20,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 137 transitions, 1396 flow [2024-06-27 21:20:20,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 1336 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:20,676 INFO L231 Difference]: Finished difference. Result has 116 places, 125 transitions, 1128 flow [2024-06-27 21:20:20,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=116, PETRI_TRANSITIONS=125} [2024-06-27 21:20:20,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 21:20:20,677 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 125 transitions, 1128 flow [2024-06-27 21:20:20,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 21:20:20,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:20,677 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 21:20:20,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:20:20,677 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:20,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash -179065945, now seen corresponding path program 3 times [2024-06-27 21:20:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414487696] [2024-06-27 21:20:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:22,850 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 21:20:22,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414487696] [2024-06-27 21:20:22,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414487696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:22,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:22,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:20:22,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550518409] [2024-06-27 21:20:22,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:22,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:20:22,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:22,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:20:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:20:22,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:22,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 125 transitions, 1128 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:22,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:22,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:22,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:23,655 INFO L124 PetriNetUnfolderBase]: 1514/2405 cut-off events. [2024-06-27 21:20:23,656 INFO L125 PetriNetUnfolderBase]: For 41419/41419 co-relation queries the response was YES. [2024-06-27 21:20:23,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13811 conditions, 2405 events. 1514/2405 cut-off events. For 41419/41419 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12261 event pairs, 411 based on Foata normal form. 2/2406 useless extension candidates. Maximal degree in co-relation 13755. Up to 2334 conditions per place. [2024-06-27 21:20:23,668 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 125 selfloop transitions, 21 changer transitions 0/150 dead transitions. [2024-06-27 21:20:23,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 1541 flow [2024-06-27 21:20:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 21:20:23,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-27 21:20:23,670 INFO L175 Difference]: Start difference. First operand has 116 places, 125 transitions, 1128 flow. Second operand 8 states and 112 transitions. [2024-06-27 21:20:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 1541 flow [2024-06-27 21:20:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 1450 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:23,709 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1212 flow [2024-06-27 21:20:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1212, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-27 21:20:23,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-27 21:20:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1212 flow [2024-06-27 21:20:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 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 21:20:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:23,710 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 21:20:23,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:20:23,710 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:23,711 INFO L85 PathProgramCache]: Analyzing trace with hash -178850619, now seen corresponding path program 1 times [2024-06-27 21:20:23,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:23,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156723709] [2024-06-27 21:20:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:23,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:26,684 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 21:20:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156723709] [2024-06-27 21:20:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156723709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:26,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:26,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312607741] [2024-06-27 21:20:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:26,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:26,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1212 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:26,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:26,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:26,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:27,718 INFO L124 PetriNetUnfolderBase]: 1509/2400 cut-off events. [2024-06-27 21:20:27,718 INFO L125 PetriNetUnfolderBase]: For 43476/43476 co-relation queries the response was YES. [2024-06-27 21:20:27,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14130 conditions, 2400 events. 1509/2400 cut-off events. For 43476/43476 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12262 event pairs, 408 based on Foata normal form. 2/2401 useless extension candidates. Maximal degree in co-relation 14071. Up to 2333 conditions per place. [2024-06-27 21:20:27,734 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-27 21:20:27,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 151 transitions, 1556 flow [2024-06-27 21:20:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:20:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:20:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 21:20:27,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-27 21:20:27,736 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1212 flow. Second operand 7 states and 101 transitions. [2024-06-27 21:20:27,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 151 transitions, 1556 flow [2024-06-27 21:20:27,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 151 transitions, 1517 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 21:20:27,778 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1236 flow [2024-06-27 21:20:27,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1236, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-27 21:20:27,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-27 21:20:27,778 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1236 flow [2024-06-27 21:20:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:27,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:27,779 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 21:20:27,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:20:27,779 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:27,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash 449619448, now seen corresponding path program 1 times [2024-06-27 21:20:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:27,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708662040] [2024-06-27 21:20:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:27,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:30,284 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 21:20:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708662040] [2024-06-27 21:20:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708662040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:30,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806623188] [2024-06-27 21:20:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:30,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:20:30,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1236 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:30,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:30,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:20:30,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:31,327 INFO L124 PetriNetUnfolderBase]: 1483/2386 cut-off events. [2024-06-27 21:20:31,328 INFO L125 PetriNetUnfolderBase]: For 48052/48053 co-relation queries the response was YES. [2024-06-27 21:20:31,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14256 conditions, 2386 events. 1483/2386 cut-off events. For 48052/48053 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12309 event pairs, 362 based on Foata normal form. 4/2388 useless extension candidates. Maximal degree in co-relation 14195. Up to 2123 conditions per place. [2024-06-27 21:20:31,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 119 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-27 21:20:31,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1712 flow [2024-06-27 21:20:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:20:31,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 21:20:31,343 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1236 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:20:31,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1712 flow [2024-06-27 21:20:31,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 171 transitions, 1665 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:31,392 INFO L231 Difference]: Finished difference. Result has 128 places, 143 transitions, 1318 flow [2024-06-27 21:20:31,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=128, PETRI_TRANSITIONS=143} [2024-06-27 21:20:31,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-27 21:20:31,393 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 143 transitions, 1318 flow [2024-06-27 21:20:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:31,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:31,394 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 21:20:31,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:20:31,394 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:31,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1701909838, now seen corresponding path program 2 times [2024-06-27 21:20:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:31,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864006328] [2024-06-27 21:20:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:33,935 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 21:20:33,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:33,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864006328] [2024-06-27 21:20:33,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864006328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:33,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:33,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:33,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547544703] [2024-06-27 21:20:33,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:33,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:33,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:33,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:34,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:20:34,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 143 transitions, 1318 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:34,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:34,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:20:34,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:34,972 INFO L124 PetriNetUnfolderBase]: 1495/2406 cut-off events. [2024-06-27 21:20:34,973 INFO L125 PetriNetUnfolderBase]: For 52099/52100 co-relation queries the response was YES. [2024-06-27 21:20:34,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14714 conditions, 2406 events. 1495/2406 cut-off events. For 52099/52100 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12486 event pairs, 408 based on Foata normal form. 4/2408 useless extension candidates. Maximal degree in co-relation 14652. Up to 2213 conditions per place. [2024-06-27 21:20:34,988 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 118 selfloop transitions, 31 changer transitions 0/167 dead transitions. [2024-06-27 21:20:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 167 transitions, 1700 flow [2024-06-27 21:20:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:20:34,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 21:20:34,990 INFO L175 Difference]: Start difference. First operand has 128 places, 143 transitions, 1318 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:20:34,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 167 transitions, 1700 flow [2024-06-27 21:20:35,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 167 transitions, 1625 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:20:35,045 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1344 flow [2024-06-27 21:20:35,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1344, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-27 21:20:35,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-27 21:20:35,046 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1344 flow [2024-06-27 21:20:35,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:35,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:35,046 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 21:20:35,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:20:35,046 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:35,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1701909714, now seen corresponding path program 1 times [2024-06-27 21:20:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:35,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412141353] [2024-06-27 21:20:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:37,657 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 21:20:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:37,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412141353] [2024-06-27 21:20:37,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412141353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:37,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:37,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111973669] [2024-06-27 21:20:37,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1344 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:37,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:37,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:37,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:38,708 INFO L124 PetriNetUnfolderBase]: 1593/2522 cut-off events. [2024-06-27 21:20:38,708 INFO L125 PetriNetUnfolderBase]: For 56065/56065 co-relation queries the response was YES. [2024-06-27 21:20:38,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15638 conditions, 2522 events. 1593/2522 cut-off events. For 56065/56065 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12969 event pairs, 408 based on Foata normal form. 2/2523 useless extension candidates. Maximal degree in co-relation 15574. Up to 2390 conditions per place. [2024-06-27 21:20:38,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 140 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2024-06-27 21:20:38,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 1969 flow [2024-06-27 21:20:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:20:38,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 21:20:38,727 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1344 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:20:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 1969 flow [2024-06-27 21:20:38,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 1885 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:20:38,790 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1519 flow [2024-06-27 21:20:38,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-27 21:20:38,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 21:20:38,791 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1519 flow [2024-06-27 21:20:38,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:38,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:38,791 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 21:20:38,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:20:38,792 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:38,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:38,792 INFO L85 PathProgramCache]: Analyzing trace with hash 339509808, now seen corresponding path program 2 times [2024-06-27 21:20:38,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556769812] [2024-06-27 21:20:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:38,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:42,898 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 21:20:42,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:42,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556769812] [2024-06-27 21:20:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556769812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:42,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144344945] [2024-06-27 21:20:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:42,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:42,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:42,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1519 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:42,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:42,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:42,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:43,818 INFO L124 PetriNetUnfolderBase]: 1587/2512 cut-off events. [2024-06-27 21:20:43,818 INFO L125 PetriNetUnfolderBase]: For 59434/59434 co-relation queries the response was YES. [2024-06-27 21:20:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15956 conditions, 2512 events. 1587/2512 cut-off events. For 59434/59434 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12858 event pairs, 409 based on Foata normal form. 2/2513 useless extension candidates. Maximal degree in co-relation 15889. Up to 2429 conditions per place. [2024-06-27 21:20:43,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 21 changer transitions 0/182 dead transitions. [2024-06-27 21:20:43,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 182 transitions, 1991 flow [2024-06-27 21:20:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-27 21:20:43,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34688346883468835 [2024-06-27 21:20:43,835 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1519 flow. Second operand 9 states and 128 transitions. [2024-06-27 21:20:43,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 182 transitions, 1991 flow [2024-06-27 21:20:43,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 182 transitions, 1874 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:43,911 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1533 flow [2024-06-27 21:20:43,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1533, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2024-06-27 21:20:43,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 21:20:43,911 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1533 flow [2024-06-27 21:20:43,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:43,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:43,912 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 21:20:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:20:43,912 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:43,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1145679084, now seen corresponding path program 3 times [2024-06-27 21:20:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:43,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599276335] [2024-06-27 21:20:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:47,357 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 21:20:47,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:47,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599276335] [2024-06-27 21:20:47,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599276335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:47,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:47,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886478281] [2024-06-27 21:20:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:47,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:20:47,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1533 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:47,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:47,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:20:47,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:48,357 INFO L124 PetriNetUnfolderBase]: 1555/2490 cut-off events. [2024-06-27 21:20:48,357 INFO L125 PetriNetUnfolderBase]: For 65474/65475 co-relation queries the response was YES. [2024-06-27 21:20:48,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15775 conditions, 2490 events. 1555/2490 cut-off events. For 65474/65475 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12921 event pairs, 409 based on Foata normal form. 14/2502 useless extension candidates. Maximal degree in co-relation 15707. Up to 2252 conditions per place. [2024-06-27 21:20:48,377 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 140 selfloop transitions, 28 changer transitions 0/191 dead transitions. [2024-06-27 21:20:48,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 191 transitions, 2041 flow [2024-06-27 21:20:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:20:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:20:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:20:48,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 21:20:48,378 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1533 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:20:48,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 191 transitions, 2041 flow [2024-06-27 21:20:48,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 191 transitions, 1978 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:48,448 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1615 flow [2024-06-27 21:20:48,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1615, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-06-27 21:20:48,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 21:20:48,448 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1615 flow [2024-06-27 21:20:48,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:48,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:48,448 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 21:20:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:20:48,449 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:48,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:48,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1256079430, now seen corresponding path program 3 times [2024-06-27 21:20:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:48,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778141624] [2024-06-27 21:20:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:48,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:51,522 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 21:20:51,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778141624] [2024-06-27 21:20:51,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778141624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:51,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:51,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:51,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574139060] [2024-06-27 21:20:51,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:51,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:51,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:51,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1615 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:51,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:51,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:51,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:52,651 INFO L124 PetriNetUnfolderBase]: 1623/2570 cut-off events. [2024-06-27 21:20:52,651 INFO L125 PetriNetUnfolderBase]: For 65382/65382 co-relation queries the response was YES. [2024-06-27 21:20:52,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16710 conditions, 2570 events. 1623/2570 cut-off events. For 65382/65382 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13262 event pairs, 410 based on Foata normal form. 2/2571 useless extension candidates. Maximal degree in co-relation 16639. Up to 2465 conditions per place. [2024-06-27 21:20:52,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 33 changer transitions 0/192 dead transitions. [2024-06-27 21:20:52,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 192 transitions, 2156 flow [2024-06-27 21:20:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-27 21:20:52,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-27 21:20:52,674 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1615 flow. Second operand 9 states and 131 transitions. [2024-06-27 21:20:52,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 192 transitions, 2156 flow [2024-06-27 21:20:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 192 transitions, 2076 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:52,741 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1677 flow [2024-06-27 21:20:52,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1677, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-27 21:20:52,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-27 21:20:52,741 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1677 flow [2024-06-27 21:20:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:52,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:52,742 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 21:20:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:20:52,742 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:52,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1256079554, now seen corresponding path program 4 times [2024-06-27 21:20:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537555458] [2024-06-27 21:20:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:55,532 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 21:20:55,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537555458] [2024-06-27 21:20:55,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537555458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:55,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:55,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603099914] [2024-06-27 21:20:55,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:55,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 21:20:55,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1677 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:55,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:55,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 21:20:55,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:20:56,856 INFO L124 PetriNetUnfolderBase]: 1725/2736 cut-off events. [2024-06-27 21:20:56,857 INFO L125 PetriNetUnfolderBase]: For 80975/80976 co-relation queries the response was YES. [2024-06-27 21:20:56,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18313 conditions, 2736 events. 1725/2736 cut-off events. For 80975/80976 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14273 event pairs, 382 based on Foata normal form. 12/2744 useless extension candidates. Maximal degree in co-relation 18240. Up to 2294 conditions per place. [2024-06-27 21:20:56,879 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 126 selfloop transitions, 64 changer transitions 0/215 dead transitions. [2024-06-27 21:20:56,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 215 transitions, 2399 flow [2024-06-27 21:20:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:20:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:20:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:20:56,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 21:20:56,880 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1677 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:20:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 215 transitions, 2399 flow [2024-06-27 21:20:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2320 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:20:56,977 INFO L231 Difference]: Finished difference. Result has 156 places, 190 transitions, 1989 flow [2024-06-27 21:20:56,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1989, PETRI_PLACES=156, PETRI_TRANSITIONS=190} [2024-06-27 21:20:56,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 21:20:56,978 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 190 transitions, 1989 flow [2024-06-27 21:20:56,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 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 21:20:56,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:20:56,978 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 21:20:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:20:56,978 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:20:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:20:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash 620617742, now seen corresponding path program 4 times [2024-06-27 21:20:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:20:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691145699] [2024-06-27 21:20:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:20:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:20:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:20:59,745 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 21:20:59,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:20:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691145699] [2024-06-27 21:20:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691145699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:20:59,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:20:59,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:20:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454800123] [2024-06-27 21:20:59,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:20:59,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:20:59,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:20:59,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:20:59,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:20:59,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:20:59,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 190 transitions, 1989 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:20:59,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:20:59,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:20:59,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:00,754 INFO L124 PetriNetUnfolderBase]: 1783/2809 cut-off events. [2024-06-27 21:21:00,755 INFO L125 PetriNetUnfolderBase]: For 82513/82513 co-relation queries the response was YES. [2024-06-27 21:21:00,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19848 conditions, 2809 events. 1783/2809 cut-off events. For 82513/82513 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14601 event pairs, 424 based on Foata normal form. 2/2810 useless extension candidates. Maximal degree in co-relation 19771. Up to 2735 conditions per place. [2024-06-27 21:21:00,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-27 21:21:00,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 2486 flow [2024-06-27 21:21:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-27 21:21:00,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-27 21:21:00,780 INFO L175 Difference]: Start difference. First operand has 156 places, 190 transitions, 1989 flow. Second operand 8 states and 113 transitions. [2024-06-27 21:21:00,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 2486 flow [2024-06-27 21:21:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 207 transitions, 2448 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:00,884 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 2054 flow [2024-06-27 21:21:00,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2054, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-27 21:21:00,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 21:21:00,885 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 2054 flow [2024-06-27 21:21:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:00,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:00,885 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 21:21:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:21:00,886 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:00,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1228205543, now seen corresponding path program 1 times [2024-06-27 21:21:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095114507] [2024-06-27 21:21:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:00,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:04,213 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 21:21:04,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095114507] [2024-06-27 21:21:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095114507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489426677] [2024-06-27 21:21:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:04,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:04,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 2054 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:04,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:04,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:04,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:05,418 INFO L124 PetriNetUnfolderBase]: 1791/2819 cut-off events. [2024-06-27 21:21:05,418 INFO L125 PetriNetUnfolderBase]: For 86008/86008 co-relation queries the response was YES. [2024-06-27 21:21:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19986 conditions, 2819 events. 1791/2819 cut-off events. For 86008/86008 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14522 event pairs, 326 based on Foata normal form. 2/2819 useless extension candidates. Maximal degree in co-relation 19907. Up to 2661 conditions per place. [2024-06-27 21:21:05,439 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 192 selfloop transitions, 19 changer transitions 0/215 dead transitions. [2024-06-27 21:21:05,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 215 transitions, 2656 flow [2024-06-27 21:21:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 21:21:05,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-27 21:21:05,441 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 2054 flow. Second operand 6 states and 98 transitions. [2024-06-27 21:21:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 215 transitions, 2656 flow [2024-06-27 21:21:05,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 215 transitions, 2600 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:05,557 INFO L231 Difference]: Finished difference. Result has 162 places, 197 transitions, 2115 flow [2024-06-27 21:21:05,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2115, PETRI_PLACES=162, PETRI_TRANSITIONS=197} [2024-06-27 21:21:05,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-27 21:21:05,557 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 197 transitions, 2115 flow [2024-06-27 21:21:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:05,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:05,558 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 21:21:05,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:21:05,558 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:05,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:05,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1932143661, now seen corresponding path program 2 times [2024-06-27 21:21:05,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:05,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071211351] [2024-06-27 21:21:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:05,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:08,558 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 21:21:08,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:08,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071211351] [2024-06-27 21:21:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071211351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:08,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704039716] [2024-06-27 21:21:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:08,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:08,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 197 transitions, 2115 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 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 21:21:08,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:08,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:08,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:09,787 INFO L124 PetriNetUnfolderBase]: 1786/2810 cut-off events. [2024-06-27 21:21:09,787 INFO L125 PetriNetUnfolderBase]: For 89040/89040 co-relation queries the response was YES. [2024-06-27 21:21:09,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20064 conditions, 2810 events. 1786/2810 cut-off events. For 89040/89040 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14562 event pairs, 437 based on Foata normal form. 2/2810 useless extension candidates. Maximal degree in co-relation 19984. Up to 2703 conditions per place. [2024-06-27 21:21:09,810 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 187 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-06-27 21:21:09,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 209 transitions, 2555 flow [2024-06-27 21:21:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:21:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:21:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-27 21:21:09,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:21:09,811 INFO L175 Difference]: Start difference. First operand has 162 places, 197 transitions, 2115 flow. Second operand 6 states and 93 transitions. [2024-06-27 21:21:09,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 209 transitions, 2555 flow [2024-06-27 21:21:09,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 209 transitions, 2487 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 21:21:09,927 INFO L231 Difference]: Finished difference. Result has 166 places, 197 transitions, 2088 flow [2024-06-27 21:21:09,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2088, PETRI_PLACES=166, PETRI_TRANSITIONS=197} [2024-06-27 21:21:09,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-27 21:21:09,928 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 197 transitions, 2088 flow [2024-06-27 21:21:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 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 21:21:09,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:09,929 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 21:21:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:21:09,929 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:09,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1131982771, now seen corresponding path program 1 times [2024-06-27 21:21:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316248764] [2024-06-27 21:21:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:13,076 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 21:21:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316248764] [2024-06-27 21:21:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316248764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:13,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:13,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:13,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172296361] [2024-06-27 21:21:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:13,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:13,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:13,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 197 transitions, 2088 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 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 21:21:13,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:13,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:13,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:14,147 INFO L124 PetriNetUnfolderBase]: 1791/2819 cut-off events. [2024-06-27 21:21:14,147 INFO L125 PetriNetUnfolderBase]: For 93114/93116 co-relation queries the response was YES. [2024-06-27 21:21:14,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 2819 events. 1791/2819 cut-off events. For 93114/93116 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14578 event pairs, 439 based on Foata normal form. 1/2819 useless extension candidates. Maximal degree in co-relation 20139. Up to 2638 conditions per place. [2024-06-27 21:21:14,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 45 changer transitions 0/217 dead transitions. [2024-06-27 21:21:14,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 217 transitions, 2638 flow [2024-06-27 21:21:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:21:14,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-27 21:21:14,169 INFO L175 Difference]: Start difference. First operand has 166 places, 197 transitions, 2088 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:21:14,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 217 transitions, 2638 flow [2024-06-27 21:21:14,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 2594 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:14,264 INFO L231 Difference]: Finished difference. Result has 169 places, 202 transitions, 2243 flow [2024-06-27 21:21:14,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2243, PETRI_PLACES=169, PETRI_TRANSITIONS=202} [2024-06-27 21:21:14,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 21:21:14,265 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 202 transitions, 2243 flow [2024-06-27 21:21:14,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 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 21:21:14,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:14,265 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 21:21:14,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:21:14,266 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:14,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1455520626, now seen corresponding path program 1 times [2024-06-27 21:21:14,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:14,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013953354] [2024-06-27 21:21:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:17,314 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 21:21:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013953354] [2024-06-27 21:21:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013953354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:17,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:17,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:17,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801608554] [2024-06-27 21:21:17,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:17,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:17,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 202 transitions, 2243 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:17,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:17,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:17,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:18,312 INFO L124 PetriNetUnfolderBase]: 1862/2932 cut-off events. [2024-06-27 21:21:18,312 INFO L125 PetriNetUnfolderBase]: For 101956/101956 co-relation queries the response was YES. [2024-06-27 21:21:18,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21447 conditions, 2932 events. 1862/2932 cut-off events. For 101956/101956 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15198 event pairs, 420 based on Foata normal form. 4/2935 useless extension candidates. Maximal degree in co-relation 21363. Up to 2804 conditions per place. [2024-06-27 21:21:18,338 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 27 changer transitions 0/244 dead transitions. [2024-06-27 21:21:18,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 244 transitions, 3057 flow [2024-06-27 21:21:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:21:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:21:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:21:18,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:21:18,341 INFO L175 Difference]: Start difference. First operand has 169 places, 202 transitions, 2243 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:21:18,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 244 transitions, 3057 flow [2024-06-27 21:21:18,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 244 transitions, 2924 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:18,483 INFO L231 Difference]: Finished difference. Result has 178 places, 220 transitions, 2478 flow [2024-06-27 21:21:18,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2478, PETRI_PLACES=178, PETRI_TRANSITIONS=220} [2024-06-27 21:21:18,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-27 21:21:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 220 transitions, 2478 flow [2024-06-27 21:21:18,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:18,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:18,484 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 21:21:18,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:21:18,484 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:18,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1109785667, now seen corresponding path program 2 times [2024-06-27 21:21:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571728781] [2024-06-27 21:21:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:21,238 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 21:21:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:21,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571728781] [2024-06-27 21:21:21,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571728781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:21,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:21,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:21,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639084596] [2024-06-27 21:21:21,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:21,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:21,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 220 transitions, 2478 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:21,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:21,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:21,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:22,395 INFO L124 PetriNetUnfolderBase]: 1872/2952 cut-off events. [2024-06-27 21:21:22,395 INFO L125 PetriNetUnfolderBase]: For 107145/107149 co-relation queries the response was YES. [2024-06-27 21:21:22,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21960 conditions, 2952 events. 1872/2952 cut-off events. For 107145/107149 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15419 event pairs, 427 based on Foata normal form. 6/2957 useless extension candidates. Maximal degree in co-relation 21871. Up to 2753 conditions per place. [2024-06-27 21:21:22,421 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 196 selfloop transitions, 43 changer transitions 0/243 dead transitions. [2024-06-27 21:21:22,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 243 transitions, 3234 flow [2024-06-27 21:21:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:21:22,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:21:22,423 INFO L175 Difference]: Start difference. First operand has 178 places, 220 transitions, 2478 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:21:22,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 243 transitions, 3234 flow [2024-06-27 21:21:22,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 243 transitions, 3117 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:22,578 INFO L231 Difference]: Finished difference. Result has 182 places, 227 transitions, 2630 flow [2024-06-27 21:21:22,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2630, PETRI_PLACES=182, PETRI_TRANSITIONS=227} [2024-06-27 21:21:22,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-27 21:21:22,579 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 227 transitions, 2630 flow [2024-06-27 21:21:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:22,579 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 21:21:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:21:22,579 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:22,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash -986573914, now seen corresponding path program 2 times [2024-06-27 21:21:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:22,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189570606] [2024-06-27 21:21:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:25,039 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 21:21:25,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:25,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189570606] [2024-06-27 21:21:25,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189570606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:25,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:25,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619017063] [2024-06-27 21:21:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:25,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:25,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:25,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:25,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 227 transitions, 2630 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:25,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:25,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:25,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:26,554 INFO L124 PetriNetUnfolderBase]: 2032/3180 cut-off events. [2024-06-27 21:21:26,555 INFO L125 PetriNetUnfolderBase]: For 131181/131183 co-relation queries the response was YES. [2024-06-27 21:21:26,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24899 conditions, 3180 events. 2032/3180 cut-off events. For 131181/131183 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16629 event pairs, 396 based on Foata normal form. 7/3186 useless extension candidates. Maximal degree in co-relation 24809. Up to 2705 conditions per place. [2024-06-27 21:21:26,585 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 194 selfloop transitions, 77 changer transitions 0/275 dead transitions. [2024-06-27 21:21:26,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 275 transitions, 3799 flow [2024-06-27 21:21:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:21:26,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 21:21:26,586 INFO L175 Difference]: Start difference. First operand has 182 places, 227 transitions, 2630 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:21:26,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 275 transitions, 3799 flow [2024-06-27 21:21:26,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 275 transitions, 3670 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:26,765 INFO L231 Difference]: Finished difference. Result has 188 places, 248 transitions, 3150 flow [2024-06-27 21:21:26,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3150, PETRI_PLACES=188, PETRI_TRANSITIONS=248} [2024-06-27 21:21:26,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 21:21:26,766 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 248 transitions, 3150 flow [2024-06-27 21:21:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:26,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:26,766 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 21:21:26,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:21:26,767 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:26,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash 736319570, now seen corresponding path program 3 times [2024-06-27 21:21:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:26,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60399765] [2024-06-27 21:21:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:29,195 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 21:21:29,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60399765] [2024-06-27 21:21:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60399765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:29,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830238106] [2024-06-27 21:21:29,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:29,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:29,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:29,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:29,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:29,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 248 transitions, 3150 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:29,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:29,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:29,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:30,615 INFO L124 PetriNetUnfolderBase]: 2062/3224 cut-off events. [2024-06-27 21:21:30,615 INFO L125 PetriNetUnfolderBase]: For 142202/142204 co-relation queries the response was YES. [2024-06-27 21:21:30,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26596 conditions, 3224 events. 2062/3224 cut-off events. For 142202/142204 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16939 event pairs, 450 based on Foata normal form. 5/3228 useless extension candidates. Maximal degree in co-relation 26503. Up to 2991 conditions per place. [2024-06-27 21:21:30,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 61 changer transitions 0/279 dead transitions. [2024-06-27 21:21:30,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 279 transitions, 4060 flow [2024-06-27 21:21:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:21:30,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:21:30,664 INFO L175 Difference]: Start difference. First operand has 188 places, 248 transitions, 3150 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:21:30,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 279 transitions, 4060 flow [2024-06-27 21:21:30,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 279 transitions, 3925 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:30,851 INFO L231 Difference]: Finished difference. Result has 193 places, 257 transitions, 3379 flow [2024-06-27 21:21:30,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3379, PETRI_PLACES=193, PETRI_TRANSITIONS=257} [2024-06-27 21:21:30,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 21:21:30,852 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 257 transitions, 3379 flow [2024-06-27 21:21:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:30,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:30,853 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 21:21:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:21:30,853 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:30,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -986565978, now seen corresponding path program 1 times [2024-06-27 21:21:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:30,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715030950] [2024-06-27 21:21:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:30,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:33,847 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 21:21:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715030950] [2024-06-27 21:21:33,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715030950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:33,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:33,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:21:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704708440] [2024-06-27 21:21:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:33,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:21:33,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:21:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:21:33,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:33,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 257 transitions, 3379 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:21:33,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:33,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:33,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:35,335 INFO L124 PetriNetUnfolderBase]: 2106/3294 cut-off events. [2024-06-27 21:21:35,335 INFO L125 PetriNetUnfolderBase]: For 156823/156825 co-relation queries the response was YES. [2024-06-27 21:21:35,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27614 conditions, 3294 events. 2106/3294 cut-off events. For 156823/156825 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17360 event pairs, 444 based on Foata normal form. 12/3305 useless extension candidates. Maximal degree in co-relation 27518. Up to 3076 conditions per place. [2024-06-27 21:21:35,366 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 30 changer transitions 0/277 dead transitions. [2024-06-27 21:21:35,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 277 transitions, 4103 flow [2024-06-27 21:21:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:21:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:21:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:21:35,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:21:35,368 INFO L175 Difference]: Start difference. First operand has 193 places, 257 transitions, 3379 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:21:35,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 277 transitions, 4103 flow [2024-06-27 21:21:35,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 277 transitions, 3943 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:35,567 INFO L231 Difference]: Finished difference. Result has 195 places, 258 transitions, 3311 flow [2024-06-27 21:21:35,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3311, PETRI_PLACES=195, PETRI_TRANSITIONS=258} [2024-06-27 21:21:35,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-27 21:21:35,567 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 258 transitions, 3311 flow [2024-06-27 21:21:35,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:21:35,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:35,567 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 21:21:35,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:21:35,568 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:35,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1609880850, now seen corresponding path program 4 times [2024-06-27 21:21:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:35,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689566124] [2024-06-27 21:21:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:35,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:38,382 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 21:21:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689566124] [2024-06-27 21:21:38,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689566124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:38,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:38,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:38,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522340552] [2024-06-27 21:21:38,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:38,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:38,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:38,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:38,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 258 transitions, 3311 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:38,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:38,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:38,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:39,567 INFO L124 PetriNetUnfolderBase]: 2149/3365 cut-off events. [2024-06-27 21:21:39,568 INFO L125 PetriNetUnfolderBase]: For 156959/156963 co-relation queries the response was YES. [2024-06-27 21:21:39,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28182 conditions, 3365 events. 2149/3365 cut-off events. For 156959/156963 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17810 event pairs, 454 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 28085. Up to 3164 conditions per place. [2024-06-27 21:21:39,601 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 37 changer transitions 0/290 dead transitions. [2024-06-27 21:21:39,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 290 transitions, 4142 flow [2024-06-27 21:21:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:21:39,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:21:39,602 INFO L175 Difference]: Start difference. First operand has 195 places, 258 transitions, 3311 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:21:39,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 290 transitions, 4142 flow [2024-06-27 21:21:39,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 290 transitions, 4084 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:39,784 INFO L231 Difference]: Finished difference. Result has 199 places, 269 transitions, 3559 flow [2024-06-27 21:21:39,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3559, PETRI_PLACES=199, PETRI_TRANSITIONS=269} [2024-06-27 21:21:39,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 21:21:39,784 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 269 transitions, 3559 flow [2024-06-27 21:21:39,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:39,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:39,785 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 21:21:39,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:21:39,785 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:39,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1057104718, now seen corresponding path program 5 times [2024-06-27 21:21:39,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:39,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784676907] [2024-06-27 21:21:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:39,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:42,777 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 21:21:42,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784676907] [2024-06-27 21:21:42,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784676907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:42,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:42,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:42,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932385500] [2024-06-27 21:21:42,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:42,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:42,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:42,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 269 transitions, 3559 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:42,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:42,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:43,901 INFO L124 PetriNetUnfolderBase]: 2183/3412 cut-off events. [2024-06-27 21:21:43,901 INFO L125 PetriNetUnfolderBase]: For 168266/168270 co-relation queries the response was YES. [2024-06-27 21:21:43,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29399 conditions, 3412 events. 2183/3412 cut-off events. For 168266/168270 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18108 event pairs, 452 based on Foata normal form. 6/3417 useless extension candidates. Maximal degree in co-relation 29300. Up to 3150 conditions per place. [2024-06-27 21:21:43,932 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 231 selfloop transitions, 60 changer transitions 0/295 dead transitions. [2024-06-27 21:21:43,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 295 transitions, 4485 flow [2024-06-27 21:21:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:21:43,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:21:43,933 INFO L175 Difference]: Start difference. First operand has 199 places, 269 transitions, 3559 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:21:43,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 295 transitions, 4485 flow [2024-06-27 21:21:44,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 295 transitions, 4306 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:44,133 INFO L231 Difference]: Finished difference. Result has 204 places, 276 transitions, 3737 flow [2024-06-27 21:21:44,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3737, PETRI_PLACES=204, PETRI_TRANSITIONS=276} [2024-06-27 21:21:44,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 21:21:44,134 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 276 transitions, 3737 flow [2024-06-27 21:21:44,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:44,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:44,134 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 21:21:44,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:21:44,134 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:44,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1133149258, now seen corresponding path program 6 times [2024-06-27 21:21:44,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:44,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119530535] [2024-06-27 21:21:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:46,757 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 21:21:46,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:46,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119530535] [2024-06-27 21:21:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119530535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:46,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197959353] [2024-06-27 21:21:46,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:46,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:46,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:46,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 276 transitions, 3737 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:46,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:46,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:46,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:47,971 INFO L124 PetriNetUnfolderBase]: 2198/3431 cut-off events. [2024-06-27 21:21:47,971 INFO L125 PetriNetUnfolderBase]: For 176980/176984 co-relation queries the response was YES. [2024-06-27 21:21:47,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30008 conditions, 3431 events. 2198/3431 cut-off events. For 176980/176984 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18184 event pairs, 456 based on Foata normal form. 6/3436 useless extension candidates. Maximal degree in co-relation 29907. Up to 3220 conditions per place. [2024-06-27 21:21:48,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 49 changer transitions 0/299 dead transitions. [2024-06-27 21:21:48,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 299 transitions, 4513 flow [2024-06-27 21:21:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:21:48,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:21:48,007 INFO L175 Difference]: Start difference. First operand has 204 places, 276 transitions, 3737 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:21:48,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 299 transitions, 4513 flow [2024-06-27 21:21:48,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 299 transitions, 4357 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-27 21:21:48,264 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 3831 flow [2024-06-27 21:21:48,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2024-06-27 21:21:48,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 21:21:48,265 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 3831 flow [2024-06-27 21:21:48,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:48,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:48,266 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 21:21:48,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:21:48,266 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:48,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -398988472, now seen corresponding path program 7 times [2024-06-27 21:21:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:48,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144994762] [2024-06-27 21:21:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:48,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:50,783 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 21:21:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:50,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144994762] [2024-06-27 21:21:50,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144994762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:50,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:50,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778261769] [2024-06-27 21:21:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:50,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:50,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:50,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:50,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 3831 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:50,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:50,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:50,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:51,951 INFO L124 PetriNetUnfolderBase]: 2258/3514 cut-off events. [2024-06-27 21:21:51,951 INFO L125 PetriNetUnfolderBase]: For 193095/193097 co-relation queries the response was YES. [2024-06-27 21:21:51,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31453 conditions, 3514 events. 2258/3514 cut-off events. For 193095/193097 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18587 event pairs, 458 based on Foata normal form. 4/3517 useless extension candidates. Maximal degree in co-relation 31350. Up to 3158 conditions per place. [2024-06-27 21:21:51,996 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 77 changer transitions 0/330 dead transitions. [2024-06-27 21:21:51,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 330 transitions, 5473 flow [2024-06-27 21:21:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:21:51,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:21:51,998 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 3831 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:21:51,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 330 transitions, 5473 flow [2024-06-27 21:21:52,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 330 transitions, 5311 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:21:52,261 INFO L231 Difference]: Finished difference. Result has 212 places, 298 transitions, 4368 flow [2024-06-27 21:21:52,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4368, PETRI_PLACES=212, PETRI_TRANSITIONS=298} [2024-06-27 21:21:52,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-27 21:21:52,262 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 298 transitions, 4368 flow [2024-06-27 21:21:52,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:52,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:52,262 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 21:21:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:21:52,262 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:52,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:52,262 INFO L85 PathProgramCache]: Analyzing trace with hash -284004152, now seen corresponding path program 8 times [2024-06-27 21:21:52,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:52,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624076282] [2024-06-27 21:21:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:52,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:54,764 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 21:21:54,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624076282] [2024-06-27 21:21:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624076282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:54,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072410620] [2024-06-27 21:21:54,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:54,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:54,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:54,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:54,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 298 transitions, 4368 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:54,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:54,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:54,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:21:56,136 INFO L124 PetriNetUnfolderBase]: 2246/3500 cut-off events. [2024-06-27 21:21:56,136 INFO L125 PetriNetUnfolderBase]: For 199482/199484 co-relation queries the response was YES. [2024-06-27 21:21:56,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31734 conditions, 3500 events. 2246/3500 cut-off events. For 199482/199484 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18573 event pairs, 467 based on Foata normal form. 4/3503 useless extension candidates. Maximal degree in co-relation 31629. Up to 3318 conditions per place. [2024-06-27 21:21:56,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 271 selfloop transitions, 39 changer transitions 0/314 dead transitions. [2024-06-27 21:21:56,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 314 transitions, 5080 flow [2024-06-27 21:21:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:21:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:21:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:21:56,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:21:56,259 INFO L175 Difference]: Start difference. First operand has 212 places, 298 transitions, 4368 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:21:56,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 314 transitions, 5080 flow [2024-06-27 21:21:56,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 314 transitions, 4890 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-27 21:21:56,504 INFO L231 Difference]: Finished difference. Result has 217 places, 298 transitions, 4264 flow [2024-06-27 21:21:56,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=217, PETRI_TRANSITIONS=298} [2024-06-27 21:21:56,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-27 21:21:56,505 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 298 transitions, 4264 flow [2024-06-27 21:21:56,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:56,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:21:56,505 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 21:21:56,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:21:56,505 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:21:56,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:21:56,506 INFO L85 PathProgramCache]: Analyzing trace with hash -278463212, now seen corresponding path program 9 times [2024-06-27 21:21:56,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:21:56,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138197084] [2024-06-27 21:21:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:21:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:21:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:21:58,681 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 21:21:58,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:21:58,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138197084] [2024-06-27 21:21:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138197084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:21:58,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:21:58,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:21:58,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760030731] [2024-06-27 21:21:58,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:21:58,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:21:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:21:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:21:58,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:21:58,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:21:58,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 298 transitions, 4264 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:21:58,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:21:58,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:21:58,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:00,170 INFO L124 PetriNetUnfolderBase]: 2263/3526 cut-off events. [2024-06-27 21:22:00,170 INFO L125 PetriNetUnfolderBase]: For 203759/203761 co-relation queries the response was YES. [2024-06-27 21:22:00,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31935 conditions, 3526 events. 2263/3526 cut-off events. For 203759/203761 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18755 event pairs, 452 based on Foata normal form. 5/3530 useless extension candidates. Maximal degree in co-relation 31828. Up to 3340 conditions per place. [2024-06-27 21:22:00,204 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 33 changer transitions 0/327 dead transitions. [2024-06-27 21:22:00,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 327 transitions, 5291 flow [2024-06-27 21:22:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:22:00,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:22:00,205 INFO L175 Difference]: Start difference. First operand has 217 places, 298 transitions, 4264 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:22:00,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 327 transitions, 5291 flow [2024-06-27 21:22:00,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 327 transitions, 5103 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:22:00,519 INFO L231 Difference]: Finished difference. Result has 219 places, 309 transitions, 4416 flow [2024-06-27 21:22:00,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4416, PETRI_PLACES=219, PETRI_TRANSITIONS=309} [2024-06-27 21:22:00,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-27 21:22:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 309 transitions, 4416 flow [2024-06-27 21:22:00,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:22:00,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:00,521 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 21:22:00,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:22:00,521 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:00,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -84316412, now seen corresponding path program 10 times [2024-06-27 21:22:00,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:00,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738911355] [2024-06-27 21:22:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:00,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:02,733 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 21:22:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738911355] [2024-06-27 21:22:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738911355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:02,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:02,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:02,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775222566] [2024-06-27 21:22:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:02,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:02,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 309 transitions, 4416 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:22:02,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:02,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:02,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:04,179 INFO L124 PetriNetUnfolderBase]: 2261/3530 cut-off events. [2024-06-27 21:22:04,179 INFO L125 PetriNetUnfolderBase]: For 207337/207339 co-relation queries the response was YES. [2024-06-27 21:22:04,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32060 conditions, 3530 events. 2261/3530 cut-off events. For 207337/207339 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18791 event pairs, 456 based on Foata normal form. 6/3535 useless extension candidates. Maximal degree in co-relation 31951. Up to 3244 conditions per place. [2024-06-27 21:22:04,214 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 272 selfloop transitions, 63 changer transitions 0/339 dead transitions. [2024-06-27 21:22:04,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 339 transitions, 5592 flow [2024-06-27 21:22:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:22:04,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:22:04,215 INFO L175 Difference]: Start difference. First operand has 219 places, 309 transitions, 4416 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:22:04,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 339 transitions, 5592 flow [2024-06-27 21:22:04,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 339 transitions, 5449 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:04,526 INFO L231 Difference]: Finished difference. Result has 223 places, 314 transitions, 4573 flow [2024-06-27 21:22:04,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=223, PETRI_TRANSITIONS=314} [2024-06-27 21:22:04,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-27 21:22:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 314 transitions, 4573 flow [2024-06-27 21:22:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:22:04,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:04,527 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 21:22:04,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:22:04,528 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -76689916, now seen corresponding path program 2 times [2024-06-27 21:22:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:04,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018102203] [2024-06-27 21:22:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:07,333 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 21:22:07,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:07,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018102203] [2024-06-27 21:22:07,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018102203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:07,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689364707] [2024-06-27 21:22:07,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:07,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:07,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 314 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 21:22:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:07,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:08,876 INFO L124 PetriNetUnfolderBase]: 2335/3642 cut-off events. [2024-06-27 21:22:08,877 INFO L125 PetriNetUnfolderBase]: For 225647/225649 co-relation queries the response was YES. [2024-06-27 21:22:08,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33411 conditions, 3642 events. 2335/3642 cut-off events. For 225647/225649 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19454 event pairs, 450 based on Foata normal form. 8/3649 useless extension candidates. Maximal degree in co-relation 33301. Up to 3280 conditions per place. [2024-06-27 21:22:08,915 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 299 selfloop transitions, 37 changer transitions 0/340 dead transitions. [2024-06-27 21:22:08,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 340 transitions, 5641 flow [2024-06-27 21:22:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:22:08,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:22:08,917 INFO L175 Difference]: Start difference. First operand has 223 places, 314 transitions, 4573 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:22:08,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 340 transitions, 5641 flow [2024-06-27 21:22:09,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 340 transitions, 5377 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:09,277 INFO L231 Difference]: Finished difference. Result has 225 places, 316 transitions, 4437 flow [2024-06-27 21:22:09,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4437, PETRI_PLACES=225, PETRI_TRANSITIONS=316} [2024-06-27 21:22:09,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-27 21:22:09,278 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 316 transitions, 4437 flow [2024-06-27 21:22:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 21:22:09,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:09,279 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 21:22:09,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:22:09,279 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:09,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash -392326386, now seen corresponding path program 3 times [2024-06-27 21:22:09,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:09,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100778905] [2024-06-27 21:22:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:09,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:12,227 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 21:22:12,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:12,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100778905] [2024-06-27 21:22:12,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100778905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:12,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:12,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:12,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400758591] [2024-06-27 21:22:12,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:12,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:12,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:12,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:12,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 316 transitions, 4437 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:12,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:12,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:12,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:13,928 INFO L124 PetriNetUnfolderBase]: 2307/3604 cut-off events. [2024-06-27 21:22:13,928 INFO L125 PetriNetUnfolderBase]: For 223001/223003 co-relation queries the response was YES. [2024-06-27 21:22:13,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32438 conditions, 3604 events. 2307/3604 cut-off events. For 223001/223003 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19283 event pairs, 460 based on Foata normal form. 12/3615 useless extension candidates. Maximal degree in co-relation 32327. Up to 3358 conditions per place. [2024-06-27 21:22:13,965 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 297 selfloop transitions, 35 changer transitions 0/336 dead transitions. [2024-06-27 21:22:13,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 336 transitions, 5303 flow [2024-06-27 21:22:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:22:13,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:22:13,967 INFO L175 Difference]: Start difference. First operand has 225 places, 316 transitions, 4437 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:22:13,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 336 transitions, 5303 flow [2024-06-27 21:22:14,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 336 transitions, 5251 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:14,345 INFO L231 Difference]: Finished difference. Result has 229 places, 316 transitions, 4461 flow [2024-06-27 21:22:14,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4461, PETRI_PLACES=229, PETRI_TRANSITIONS=316} [2024-06-27 21:22:14,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 21:22:14,345 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 316 transitions, 4461 flow [2024-06-27 21:22:14,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:14,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:14,346 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 21:22:14,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:22:14,346 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:14,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash 873579604, now seen corresponding path program 11 times [2024-06-27 21:22:14,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:14,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514079068] [2024-06-27 21:22:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:14,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:17,122 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 21:22:17,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:17,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514079068] [2024-06-27 21:22:17,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514079068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:17,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:17,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:22:17,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933951245] [2024-06-27 21:22:17,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:17,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:22:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:22:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:22:17,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:17,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 316 transitions, 4461 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:22:17,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:17,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:17,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:18,316 INFO L124 PetriNetUnfolderBase]: 2295/3596 cut-off events. [2024-06-27 21:22:18,317 INFO L125 PetriNetUnfolderBase]: For 215004/215008 co-relation queries the response was YES. [2024-06-27 21:22:18,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32208 conditions, 3596 events. 2295/3596 cut-off events. For 215004/215008 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19330 event pairs, 454 based on Foata normal form. 8/3603 useless extension candidates. Maximal degree in co-relation 32095. Up to 3374 conditions per place. [2024-06-27 21:22:18,356 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 46 changer transitions 0/332 dead transitions. [2024-06-27 21:22:18,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 332 transitions, 5165 flow [2024-06-27 21:22:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:22:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:22:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:22:18,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:22:18,357 INFO L175 Difference]: Start difference. First operand has 229 places, 316 transitions, 4461 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:22:18,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 332 transitions, 5165 flow [2024-06-27 21:22:18,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 332 transitions, 5018 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 21:22:18,701 INFO L231 Difference]: Finished difference. Result has 229 places, 316 transitions, 4422 flow [2024-06-27 21:22:18,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4422, PETRI_PLACES=229, PETRI_TRANSITIONS=316} [2024-06-27 21:22:18,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 21:22:18,702 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 316 transitions, 4422 flow [2024-06-27 21:22:18,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 21:22:18,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:18,703 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 21:22:18,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:22:18,703 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:18,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1221469002, now seen corresponding path program 1 times [2024-06-27 21:22:18,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:18,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002923698] [2024-06-27 21:22:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:21,622 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 21:22:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:21,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002923698] [2024-06-27 21:22:21,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002923698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:21,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:21,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359415772] [2024-06-27 21:22:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:21,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:21,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 316 transitions, 4422 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:21,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:21,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:21,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:23,192 INFO L124 PetriNetUnfolderBase]: 2382/3726 cut-off events. [2024-06-27 21:22:23,192 INFO L125 PetriNetUnfolderBase]: For 239000/239000 co-relation queries the response was YES. [2024-06-27 21:22:23,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33512 conditions, 3726 events. 2382/3726 cut-off events. For 239000/239000 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20083 event pairs, 481 based on Foata normal form. 8/3733 useless extension candidates. Maximal degree in co-relation 33398. Up to 3465 conditions per place. [2024-06-27 21:22:23,231 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 21 changer transitions 0/359 dead transitions. [2024-06-27 21:22:23,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 359 transitions, 5486 flow [2024-06-27 21:22:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:22:23,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-27 21:22:23,232 INFO L175 Difference]: Start difference. First operand has 229 places, 316 transitions, 4422 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:22:23,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 359 transitions, 5486 flow [2024-06-27 21:22:23,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 359 transitions, 5351 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:22:23,708 INFO L231 Difference]: Finished difference. Result has 233 places, 321 transitions, 4406 flow [2024-06-27 21:22:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4406, PETRI_PLACES=233, PETRI_TRANSITIONS=321} [2024-06-27 21:22:23,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-27 21:22:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 321 transitions, 4406 flow [2024-06-27 21:22:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:23,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:23,709 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 21:22:23,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:22:23,709 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1848176176, now seen corresponding path program 2 times [2024-06-27 21:22:23,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499220106] [2024-06-27 21:22:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:26,372 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 21:22:26,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499220106] [2024-06-27 21:22:26,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499220106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:26,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:26,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:26,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268155292] [2024-06-27 21:22:26,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:26,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:26,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:26,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 321 transitions, 4406 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:26,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:26,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:26,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:27,742 INFO L124 PetriNetUnfolderBase]: 2410/3770 cut-off events. [2024-06-27 21:22:27,742 INFO L125 PetriNetUnfolderBase]: For 244456/244456 co-relation queries the response was YES. [2024-06-27 21:22:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33952 conditions, 3770 events. 2410/3770 cut-off events. For 244456/244456 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20417 event pairs, 488 based on Foata normal form. 8/3777 useless extension candidates. Maximal degree in co-relation 33836. Up to 3491 conditions per place. [2024-06-27 21:22:27,780 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 50 changer transitions 0/360 dead transitions. [2024-06-27 21:22:27,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 360 transitions, 5571 flow [2024-06-27 21:22:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:22:27,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 21:22:27,782 INFO L175 Difference]: Start difference. First operand has 233 places, 321 transitions, 4406 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:22:27,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 360 transitions, 5571 flow [2024-06-27 21:22:28,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 360 transitions, 5498 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 21:22:28,199 INFO L231 Difference]: Finished difference. Result has 239 places, 324 transitions, 4486 flow [2024-06-27 21:22:28,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=239, PETRI_TRANSITIONS=324} [2024-06-27 21:22:28,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 21:22:28,200 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 324 transitions, 4486 flow [2024-06-27 21:22:28,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:28,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:28,201 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 21:22:28,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:22:28,201 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:28,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1219591332, now seen corresponding path program 3 times [2024-06-27 21:22:28,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:28,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619343311] [2024-06-27 21:22:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:28,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:31,160 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 21:22:31,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:31,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619343311] [2024-06-27 21:22:31,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619343311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:31,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:31,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:31,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739215727] [2024-06-27 21:22:31,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:31,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:31,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:31,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:31,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:31,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:31,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 324 transitions, 4486 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:31,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:31,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:31,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:32,784 INFO L124 PetriNetUnfolderBase]: 2387/3737 cut-off events. [2024-06-27 21:22:32,784 INFO L125 PetriNetUnfolderBase]: For 240478/240478 co-relation queries the response was YES. [2024-06-27 21:22:32,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33324 conditions, 3737 events. 2387/3737 cut-off events. For 240478/240478 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20226 event pairs, 487 based on Foata normal form. 10/3746 useless extension candidates. Maximal degree in co-relation 33206. Up to 3519 conditions per place. [2024-06-27 21:22:32,826 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 49 changer transitions 0/356 dead transitions. [2024-06-27 21:22:32,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 356 transitions, 5469 flow [2024-06-27 21:22:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:22:32,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:22:32,828 INFO L175 Difference]: Start difference. First operand has 239 places, 324 transitions, 4486 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:22:32,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 356 transitions, 5469 flow [2024-06-27 21:22:33,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 356 transitions, 5401 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:33,283 INFO L231 Difference]: Finished difference. Result has 243 places, 325 transitions, 4539 flow [2024-06-27 21:22:33,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4420, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4539, PETRI_PLACES=243, PETRI_TRANSITIONS=325} [2024-06-27 21:22:33,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-27 21:22:33,284 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 325 transitions, 4539 flow [2024-06-27 21:22:33,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:33,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:33,284 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 21:22:33,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:22:33,285 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:33,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1132899522, now seen corresponding path program 4 times [2024-06-27 21:22:33,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:33,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87177999] [2024-06-27 21:22:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:37,218 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 21:22:37,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87177999] [2024-06-27 21:22:37,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87177999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:37,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:37,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52805595] [2024-06-27 21:22:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:37,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:37,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:37,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 325 transitions, 4539 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:37,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:37,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:37,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:38,563 INFO L124 PetriNetUnfolderBase]: 2433/3807 cut-off events. [2024-06-27 21:22:38,563 INFO L125 PetriNetUnfolderBase]: For 247978/247978 co-relation queries the response was YES. [2024-06-27 21:22:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33973 conditions, 3807 events. 2433/3807 cut-off events. For 247978/247978 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20637 event pairs, 490 based on Foata normal form. 10/3816 useless extension candidates. Maximal degree in co-relation 33853. Up to 3635 conditions per place. [2024-06-27 21:22:38,605 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 24 changer transitions 0/354 dead transitions. [2024-06-27 21:22:38,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 354 transitions, 5412 flow [2024-06-27 21:22:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 21:22:38,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-27 21:22:38,607 INFO L175 Difference]: Start difference. First operand has 243 places, 325 transitions, 4539 flow. Second operand 9 states and 134 transitions. [2024-06-27 21:22:38,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 354 transitions, 5412 flow [2024-06-27 21:22:39,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 354 transitions, 5317 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:22:39,129 INFO L231 Difference]: Finished difference. Result has 245 places, 329 transitions, 4530 flow [2024-06-27 21:22:39,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4444, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4530, PETRI_PLACES=245, PETRI_TRANSITIONS=329} [2024-06-27 21:22:39,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 21:22:39,129 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 329 transitions, 4530 flow [2024-06-27 21:22:39,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:39,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:39,130 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 21:22:39,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:22:39,130 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:39,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:39,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1934867986, now seen corresponding path program 5 times [2024-06-27 21:22:39,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:39,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178185308] [2024-06-27 21:22:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:39,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:44,254 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 21:22:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:44,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178185308] [2024-06-27 21:22:44,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178185308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:44,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:44,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:44,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219703662] [2024-06-27 21:22:44,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:44,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:44,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:44,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 329 transitions, 4530 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:44,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:44,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:44,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:45,550 INFO L124 PetriNetUnfolderBase]: 2533/3959 cut-off events. [2024-06-27 21:22:45,550 INFO L125 PetriNetUnfolderBase]: For 271560/271560 co-relation queries the response was YES. [2024-06-27 21:22:45,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35827 conditions, 3959 events. 2533/3959 cut-off events. For 271560/271560 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21611 event pairs, 504 based on Foata normal form. 8/3966 useless extension candidates. Maximal degree in co-relation 35706. Up to 3648 conditions per place. [2024-06-27 21:22:45,594 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 41 changer transitions 0/364 dead transitions. [2024-06-27 21:22:45,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 364 transitions, 5637 flow [2024-06-27 21:22:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:22:45,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 21:22:45,596 INFO L175 Difference]: Start difference. First operand has 245 places, 329 transitions, 4530 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:22:45,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 364 transitions, 5637 flow [2024-06-27 21:22:46,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 364 transitions, 5596 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:46,060 INFO L231 Difference]: Finished difference. Result has 250 places, 332 transitions, 4638 flow [2024-06-27 21:22:46,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4638, PETRI_PLACES=250, PETRI_TRANSITIONS=332} [2024-06-27 21:22:46,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-27 21:22:46,060 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 332 transitions, 4638 flow [2024-06-27 21:22:46,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:46,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:46,061 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 21:22:46,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:22:46,061 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:46,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1935021808, now seen corresponding path program 1 times [2024-06-27 21:22:46,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:46,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377675868] [2024-06-27 21:22:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:46,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:49,992 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 21:22:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377675868] [2024-06-27 21:22:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377675868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:49,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548780771] [2024-06-27 21:22:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:49,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:50,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:50,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 332 transitions, 4638 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:50,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:50,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:50,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:51,261 INFO L124 PetriNetUnfolderBase]: 2528/3950 cut-off events. [2024-06-27 21:22:51,261 INFO L125 PetriNetUnfolderBase]: For 270268/270268 co-relation queries the response was YES. [2024-06-27 21:22:51,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35957 conditions, 3950 events. 2528/3950 cut-off events. For 270268/270268 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21561 event pairs, 517 based on Foata normal form. 2/3951 useless extension candidates. Maximal degree in co-relation 35834. Up to 3833 conditions per place. [2024-06-27 21:22:51,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 331 selfloop transitions, 17 changer transitions 0/352 dead transitions. [2024-06-27 21:22:51,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 352 transitions, 5441 flow [2024-06-27 21:22:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:22:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:22:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-27 21:22:51,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-27 21:22:51,305 INFO L175 Difference]: Start difference. First operand has 250 places, 332 transitions, 4638 flow. Second operand 8 states and 116 transitions. [2024-06-27 21:22:51,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 352 transitions, 5441 flow [2024-06-27 21:22:51,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 352 transitions, 5379 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:22:51,832 INFO L231 Difference]: Finished difference. Result has 253 places, 334 transitions, 4674 flow [2024-06-27 21:22:51,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4674, PETRI_PLACES=253, PETRI_TRANSITIONS=334} [2024-06-27 21:22:51,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 21:22:51,832 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 334 transitions, 4674 flow [2024-06-27 21:22:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:51,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:51,832 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 21:22:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:22:51,833 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:51,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1280418300, now seen corresponding path program 6 times [2024-06-27 21:22:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270021288] [2024-06-27 21:22:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:51,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:22:55,433 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 21:22:55,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:22:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270021288] [2024-06-27 21:22:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270021288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:22:55,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:22:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:22:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196202467] [2024-06-27 21:22:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:22:55,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:22:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:22:55,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:22:55,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:22:55,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:22:55,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 334 transitions, 4674 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:55,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:22:55,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:22:55,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:22:56,717 INFO L124 PetriNetUnfolderBase]: 2538/3970 cut-off events. [2024-06-27 21:22:56,718 INFO L125 PetriNetUnfolderBase]: For 280935/280935 co-relation queries the response was YES. [2024-06-27 21:22:56,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35959 conditions, 3970 events. 2538/3970 cut-off events. For 280935/280935 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21755 event pairs, 517 based on Foata normal form. 10/3979 useless extension candidates. Maximal degree in co-relation 35834. Up to 3807 conditions per place. [2024-06-27 21:22:56,764 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 336 selfloop transitions, 19 changer transitions 0/359 dead transitions. [2024-06-27 21:22:56,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 359 transitions, 5533 flow [2024-06-27 21:22:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:22:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:22:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-27 21:22:56,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-27 21:22:56,765 INFO L175 Difference]: Start difference. First operand has 253 places, 334 transitions, 4674 flow. Second operand 9 states and 131 transitions. [2024-06-27 21:22:56,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 359 transitions, 5533 flow [2024-06-27 21:22:57,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 359 transitions, 5458 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 21:22:57,335 INFO L231 Difference]: Finished difference. Result has 256 places, 335 transitions, 4663 flow [2024-06-27 21:22:57,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4663, PETRI_PLACES=256, PETRI_TRANSITIONS=335} [2024-06-27 21:22:57,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:22:57,336 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 335 transitions, 4663 flow [2024-06-27 21:22:57,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:22:57,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:22:57,336 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 21:22:57,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:22:57,336 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:22:57,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:22:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -84302524, now seen corresponding path program 2 times [2024-06-27 21:22:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:22:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271756556] [2024-06-27 21:22:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:22:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:22:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:00,352 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 21:23:00,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271756556] [2024-06-27 21:23:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271756556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:00,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636490479] [2024-06-27 21:23:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:00,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:00,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:00,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:00,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 335 transitions, 4663 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:00,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:00,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:00,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:01,836 INFO L124 PetriNetUnfolderBase]: 2533/3963 cut-off events. [2024-06-27 21:23:01,836 INFO L125 PetriNetUnfolderBase]: For 273771/273771 co-relation queries the response was YES. [2024-06-27 21:23:01,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35900 conditions, 3963 events. 2533/3963 cut-off events. For 273771/273771 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21689 event pairs, 530 based on Foata normal form. 2/3964 useless extension candidates. Maximal degree in co-relation 35774. Up to 3844 conditions per place. [2024-06-27 21:23:01,880 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 324 selfloop transitions, 23 changer transitions 0/351 dead transitions. [2024-06-27 21:23:01,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 351 transitions, 5438 flow [2024-06-27 21:23:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-27 21:23:01,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-27 21:23:01,881 INFO L175 Difference]: Start difference. First operand has 256 places, 335 transitions, 4663 flow. Second operand 8 states and 113 transitions. [2024-06-27 21:23:01,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 351 transitions, 5438 flow [2024-06-27 21:23:02,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 351 transitions, 5381 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:23:02,390 INFO L231 Difference]: Finished difference. Result has 256 places, 337 transitions, 4706 flow [2024-06-27 21:23:02,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4706, PETRI_PLACES=256, PETRI_TRANSITIONS=337} [2024-06-27 21:23:02,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-27 21:23:02,391 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 337 transitions, 4706 flow [2024-06-27 21:23:02,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:02,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:02,391 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 21:23:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:23:02,392 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:02,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2041744818, now seen corresponding path program 7 times [2024-06-27 21:23:02,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:02,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813376246] [2024-06-27 21:23:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:02,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:05,435 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 21:23:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813376246] [2024-06-27 21:23:05,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813376246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:05,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:05,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:05,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878611579] [2024-06-27 21:23:05,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:05,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:05,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:05,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:05,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 337 transitions, 4706 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:05,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:05,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:05,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:07,295 INFO L124 PetriNetUnfolderBase]: 2566/4015 cut-off events. [2024-06-27 21:23:07,295 INFO L125 PetriNetUnfolderBase]: For 294958/294958 co-relation queries the response was YES. [2024-06-27 21:23:07,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36256 conditions, 4015 events. 2566/4015 cut-off events. For 294958/294958 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22055 event pairs, 534 based on Foata normal form. 11/4025 useless extension candidates. Maximal degree in co-relation 36129. Up to 3813 conditions per place. [2024-06-27 21:23:07,341 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 319 selfloop transitions, 45 changer transitions 0/368 dead transitions. [2024-06-27 21:23:07,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 368 transitions, 5650 flow [2024-06-27 21:23:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:23:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:23:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-06-27 21:23:07,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34811529933481156 [2024-06-27 21:23:07,343 INFO L175 Difference]: Start difference. First operand has 256 places, 337 transitions, 4706 flow. Second operand 11 states and 157 transitions. [2024-06-27 21:23:07,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 368 transitions, 5650 flow [2024-06-27 21:23:07,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 368 transitions, 5548 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:07,928 INFO L231 Difference]: Finished difference. Result has 263 places, 342 transitions, 4831 flow [2024-06-27 21:23:07,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4831, PETRI_PLACES=263, PETRI_TRANSITIONS=342} [2024-06-27 21:23:07,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 21:23:07,929 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 342 transitions, 4831 flow [2024-06-27 21:23:07,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:07,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:07,929 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 21:23:07,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:23:07,930 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:07,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash -76683964, now seen corresponding path program 3 times [2024-06-27 21:23:07,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:07,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588091950] [2024-06-27 21:23:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:10,710 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 21:23:10,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588091950] [2024-06-27 21:23:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588091950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:10,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:10,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365764733] [2024-06-27 21:23:10,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:10,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:10,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:10,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:10,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 342 transitions, 4831 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:10,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:10,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:10,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:12,110 INFO L124 PetriNetUnfolderBase]: 2561/4008 cut-off events. [2024-06-27 21:23:12,111 INFO L125 PetriNetUnfolderBase]: For 293567/293567 co-relation queries the response was YES. [2024-06-27 21:23:12,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36493 conditions, 4008 events. 2561/4008 cut-off events. For 293567/293567 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21992 event pairs, 514 based on Foata normal form. 2/4009 useless extension candidates. Maximal degree in co-relation 36363. Up to 3892 conditions per place. [2024-06-27 21:23:12,160 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 18 changer transitions 0/357 dead transitions. [2024-06-27 21:23:12,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 357 transitions, 5595 flow [2024-06-27 21:23:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 21:23:12,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-27 21:23:12,165 INFO L175 Difference]: Start difference. First operand has 263 places, 342 transitions, 4831 flow. Second operand 8 states and 112 transitions. [2024-06-27 21:23:12,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 357 transitions, 5595 flow [2024-06-27 21:23:12,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 357 transitions, 5499 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:23:12,856 INFO L231 Difference]: Finished difference. Result has 264 places, 343 transitions, 4804 flow [2024-06-27 21:23:12,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4804, PETRI_PLACES=264, PETRI_TRANSITIONS=343} [2024-06-27 21:23:12,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 21:23:12,857 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 343 transitions, 4804 flow [2024-06-27 21:23:12,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:12,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:12,857 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 21:23:12,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:23:12,857 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:12,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -283754416, now seen corresponding path program 8 times [2024-06-27 21:23:12,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:12,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775256613] [2024-06-27 21:23:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:15,733 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 21:23:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775256613] [2024-06-27 21:23:15,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775256613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:15,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:15,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819759072] [2024-06-27 21:23:15,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:15,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:15,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:15,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:15,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 343 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:15,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:15,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:15,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:17,152 INFO L124 PetriNetUnfolderBase]: 2607/4078 cut-off events. [2024-06-27 21:23:17,152 INFO L125 PetriNetUnfolderBase]: For 306644/306644 co-relation queries the response was YES. [2024-06-27 21:23:17,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36849 conditions, 4078 events. 2607/4078 cut-off events. For 306644/306644 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22479 event pairs, 537 based on Foata normal form. 10/4087 useless extension candidates. Maximal degree in co-relation 36718. Up to 3888 conditions per place. [2024-06-27 21:23:17,202 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 44 changer transitions 0/370 dead transitions. [2024-06-27 21:23:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 370 transitions, 5721 flow [2024-06-27 21:23:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:23:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:23:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 21:23:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2024-06-27 21:23:17,203 INFO L175 Difference]: Start difference. First operand has 264 places, 343 transitions, 4804 flow. Second operand 10 states and 142 transitions. [2024-06-27 21:23:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 370 transitions, 5721 flow [2024-06-27 21:23:17,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 370 transitions, 5658 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:17,881 INFO L231 Difference]: Finished difference. Result has 268 places, 347 transitions, 4882 flow [2024-06-27 21:23:17,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4882, PETRI_PLACES=268, PETRI_TRANSITIONS=347} [2024-06-27 21:23:17,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-27 21:23:17,881 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 347 transitions, 4882 flow [2024-06-27 21:23:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:17,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:17,882 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 21:23:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:23:17,882 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:17,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -283758136, now seen corresponding path program 9 times [2024-06-27 21:23:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:17,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059071192] [2024-06-27 21:23:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:20,821 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 21:23:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059071192] [2024-06-27 21:23:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059071192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:20,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:20,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81645685] [2024-06-27 21:23:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:20,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:20,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:20,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:20,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 347 transitions, 4882 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:20,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:20,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:20,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:22,516 INFO L124 PetriNetUnfolderBase]: 2673/4176 cut-off events. [2024-06-27 21:23:22,516 INFO L125 PetriNetUnfolderBase]: For 326793/326793 co-relation queries the response was YES. [2024-06-27 21:23:22,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38185 conditions, 4176 events. 2673/4176 cut-off events. For 326793/326793 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22976 event pairs, 538 based on Foata normal form. 8/4183 useless extension candidates. Maximal degree in co-relation 38053. Up to 3792 conditions per place. [2024-06-27 21:23:22,561 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 70 changer transitions 0/390 dead transitions. [2024-06-27 21:23:22,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 390 transitions, 6288 flow [2024-06-27 21:23:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:23:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:23:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 21:23:22,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-27 21:23:22,563 INFO L175 Difference]: Start difference. First operand has 268 places, 347 transitions, 4882 flow. Second operand 10 states and 156 transitions. [2024-06-27 21:23:22,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 390 transitions, 6288 flow [2024-06-27 21:23:23,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 390 transitions, 6180 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:23:23,212 INFO L231 Difference]: Finished difference. Result has 273 places, 358 transitions, 5192 flow [2024-06-27 21:23:23,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5192, PETRI_PLACES=273, PETRI_TRANSITIONS=358} [2024-06-27 21:23:23,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-27 21:23:23,212 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 358 transitions, 5192 flow [2024-06-27 21:23:23,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:23,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:23,213 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 21:23:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:23:23,213 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:23,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash -283610266, now seen corresponding path program 10 times [2024-06-27 21:23:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:23,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624491942] [2024-06-27 21:23:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:26,232 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 21:23:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624491942] [2024-06-27 21:23:26,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624491942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:26,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429195255] [2024-06-27 21:23:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:26,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:26,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:26,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:26,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 358 transitions, 5192 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:26,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:26,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:26,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:28,189 INFO L124 PetriNetUnfolderBase]: 2650/4145 cut-off events. [2024-06-27 21:23:28,189 INFO L125 PetriNetUnfolderBase]: For 320877/320877 co-relation queries the response was YES. [2024-06-27 21:23:28,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37694 conditions, 4145 events. 2650/4145 cut-off events. For 320877/320877 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22865 event pairs, 545 based on Foata normal form. 10/4154 useless extension candidates. Maximal degree in co-relation 37560. Up to 3939 conditions per place. [2024-06-27 21:23:28,231 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 325 selfloop transitions, 53 changer transitions 0/382 dead transitions. [2024-06-27 21:23:28,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 6222 flow [2024-06-27 21:23:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:23:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:23:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-27 21:23:28,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35853658536585364 [2024-06-27 21:23:28,232 INFO L175 Difference]: Start difference. First operand has 273 places, 358 transitions, 5192 flow. Second operand 10 states and 147 transitions. [2024-06-27 21:23:28,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 6222 flow [2024-06-27 21:23:28,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 382 transitions, 6136 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:23:28,942 INFO L231 Difference]: Finished difference. Result has 278 places, 359 transitions, 5244 flow [2024-06-27 21:23:28,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5244, PETRI_PLACES=278, PETRI_TRANSITIONS=359} [2024-06-27 21:23:28,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:23:28,942 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 359 transitions, 5244 flow [2024-06-27 21:23:28,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:28,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:28,943 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 21:23:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:23:28,943 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:28,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:28,943 INFO L85 PathProgramCache]: Analyzing trace with hash -283604314, now seen corresponding path program 4 times [2024-06-27 21:23:28,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:28,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452694209] [2024-06-27 21:23:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:28,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:32,018 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 21:23:32,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:32,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452694209] [2024-06-27 21:23:32,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452694209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:32,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:32,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:32,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326998467] [2024-06-27 21:23:32,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:32,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:32,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:32,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:32,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:32,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 359 transitions, 5244 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:32,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:32,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:32,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:33,510 INFO L124 PetriNetUnfolderBase]: 2665/4170 cut-off events. [2024-06-27 21:23:33,510 INFO L125 PetriNetUnfolderBase]: For 318495/318495 co-relation queries the response was YES. [2024-06-27 21:23:33,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37771 conditions, 4170 events. 2665/4170 cut-off events. For 318495/318495 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23034 event pairs, 552 based on Foata normal form. 8/4177 useless extension candidates. Maximal degree in co-relation 37635. Up to 3972 conditions per place. [2024-06-27 21:23:33,563 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 342 selfloop transitions, 34 changer transitions 0/380 dead transitions. [2024-06-27 21:23:33,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 380 transitions, 6137 flow [2024-06-27 21:23:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 21:23:33,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-27 21:23:33,565 INFO L175 Difference]: Start difference. First operand has 278 places, 359 transitions, 5244 flow. Second operand 9 states and 132 transitions. [2024-06-27 21:23:33,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 380 transitions, 6137 flow [2024-06-27 21:23:34,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 380 transitions, 5920 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-27 21:23:34,227 INFO L231 Difference]: Finished difference. Result has 278 places, 360 transitions, 5129 flow [2024-06-27 21:23:34,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5027, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5129, PETRI_PLACES=278, PETRI_TRANSITIONS=360} [2024-06-27 21:23:34,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 21:23:34,228 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 360 transitions, 5129 flow [2024-06-27 21:23:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:34,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:34,228 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, 1] [2024-06-27 21:23:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:23:34,228 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:34,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash 580336205, now seen corresponding path program 1 times [2024-06-27 21:23:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:34,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612014035] [2024-06-27 21:23:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:37,670 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 21:23:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612014035] [2024-06-27 21:23:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612014035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:37,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:37,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850921902] [2024-06-27 21:23:37,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:37,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:37,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 360 transitions, 5129 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:37,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:37,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:37,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:40,037 INFO L124 PetriNetUnfolderBase]: 2858/4474 cut-off events. [2024-06-27 21:23:40,037 INFO L125 PetriNetUnfolderBase]: For 352284/352284 co-relation queries the response was YES. [2024-06-27 21:23:40,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40294 conditions, 4474 events. 2858/4474 cut-off events. For 352284/352284 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25093 event pairs, 539 based on Foata normal form. 8/4481 useless extension candidates. Maximal degree in co-relation 40157. Up to 4111 conditions per place. [2024-06-27 21:23:40,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 46 changer transitions 0/433 dead transitions. [2024-06-27 21:23:40,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 433 transitions, 6744 flow [2024-06-27 21:23:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:23:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:23:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-27 21:23:40,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800813008130081 [2024-06-27 21:23:40,100 INFO L175 Difference]: Start difference. First operand has 278 places, 360 transitions, 5129 flow. Second operand 12 states and 187 transitions. [2024-06-27 21:23:40,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 433 transitions, 6744 flow [2024-06-27 21:23:40,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 433 transitions, 6668 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:23:40,983 INFO L231 Difference]: Finished difference. Result has 288 places, 385 transitions, 5581 flow [2024-06-27 21:23:40,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5053, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5581, PETRI_PLACES=288, PETRI_TRANSITIONS=385} [2024-06-27 21:23:40,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 21:23:40,983 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 385 transitions, 5581 flow [2024-06-27 21:23:40,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:40,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:40,984 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, 1] [2024-06-27 21:23:40,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:23:40,984 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:40,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:40,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1911617191, now seen corresponding path program 2 times [2024-06-27 21:23:40,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:40,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102878884] [2024-06-27 21:23:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:40,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:44,454 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 21:23:44,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:44,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102878884] [2024-06-27 21:23:44,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102878884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:44,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:44,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:23:44,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712195238] [2024-06-27 21:23:44,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:44,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:23:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:23:44,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:23:44,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:44,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 385 transitions, 5581 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:44,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:44,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:44,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:46,339 INFO L124 PetriNetUnfolderBase]: 2868/4494 cut-off events. [2024-06-27 21:23:46,340 INFO L125 PetriNetUnfolderBase]: For 360155/360157 co-relation queries the response was YES. [2024-06-27 21:23:46,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40380 conditions, 4494 events. 2868/4494 cut-off events. For 360155/360157 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25125 event pairs, 541 based on Foata normal form. 16/4509 useless extension candidates. Maximal degree in co-relation 40237. Up to 4097 conditions per place. [2024-06-27 21:23:46,398 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 53 changer transitions 0/409 dead transitions. [2024-06-27 21:23:46,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 409 transitions, 6647 flow [2024-06-27 21:23:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:23:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:23:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:23:46,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:23:46,399 INFO L175 Difference]: Start difference. First operand has 288 places, 385 transitions, 5581 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:23:46,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 409 transitions, 6647 flow [2024-06-27 21:23:47,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 409 transitions, 6548 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 21:23:47,318 INFO L231 Difference]: Finished difference. Result has 293 places, 386 transitions, 5623 flow [2024-06-27 21:23:47,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5623, PETRI_PLACES=293, PETRI_TRANSITIONS=386} [2024-06-27 21:23:47,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-27 21:23:47,319 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 386 transitions, 5623 flow [2024-06-27 21:23:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:23:47,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:47,319 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, 1] [2024-06-27 21:23:47,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:23:47,319 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:47,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash 480927798, now seen corresponding path program 1 times [2024-06-27 21:23:47,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:47,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617351365] [2024-06-27 21:23:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:47,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:50,264 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 21:23:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617351365] [2024-06-27 21:23:50,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617351365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:50,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:50,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:23:50,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563630193] [2024-06-27 21:23:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:50,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:23:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:23:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:23:50,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:50,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 386 transitions, 5623 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:23:50,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:50,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:50,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:52,112 INFO L124 PetriNetUnfolderBase]: 2934/4598 cut-off events. [2024-06-27 21:23:52,113 INFO L125 PetriNetUnfolderBase]: For 340555/340559 co-relation queries the response was YES. [2024-06-27 21:23:52,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41320 conditions, 4598 events. 2934/4598 cut-off events. For 340555/340559 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25797 event pairs, 593 based on Foata normal form. 1/4598 useless extension candidates. Maximal degree in co-relation 41175. Up to 4265 conditions per place. [2024-06-27 21:23:52,175 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 78 changer transitions 0/430 dead transitions. [2024-06-27 21:23:52,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 430 transitions, 6893 flow [2024-06-27 21:23:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:23:52,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 21:23:52,176 INFO L175 Difference]: Start difference. First operand has 293 places, 386 transitions, 5623 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:23:52,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 430 transitions, 6893 flow [2024-06-27 21:23:53,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 430 transitions, 6746 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 21:23:53,126 INFO L231 Difference]: Finished difference. Result has 300 places, 410 transitions, 6153 flow [2024-06-27 21:23:53,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5494, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6153, PETRI_PLACES=300, PETRI_TRANSITIONS=410} [2024-06-27 21:23:53,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 21:23:53,126 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 410 transitions, 6153 flow [2024-06-27 21:23:53,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:23:53,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:53,127 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, 1] [2024-06-27 21:23:53,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:23:53,127 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:53,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:53,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1037325505, now seen corresponding path program 1 times [2024-06-27 21:23:53,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:53,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260438909] [2024-06-27 21:23:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:53,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:23:56,798 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 21:23:56,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:23:56,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260438909] [2024-06-27 21:23:56,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260438909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:23:56,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:23:56,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:23:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543956745] [2024-06-27 21:23:56,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:23:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:23:56,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:23:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:23:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:23:56,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:23:56,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 410 transitions, 6153 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:23:56,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:23:56,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:23:56,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:23:58,631 INFO L124 PetriNetUnfolderBase]: 2949/4619 cut-off events. [2024-06-27 21:23:58,631 INFO L125 PetriNetUnfolderBase]: For 353885/353889 co-relation queries the response was YES. [2024-06-27 21:23:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42169 conditions, 4619 events. 2949/4619 cut-off events. For 353885/353889 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25960 event pairs, 579 based on Foata normal form. 2/4620 useless extension candidates. Maximal degree in co-relation 42019. Up to 4178 conditions per place. [2024-06-27 21:23:58,696 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 321 selfloop transitions, 117 changer transitions 0/442 dead transitions. [2024-06-27 21:23:58,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 442 transitions, 7413 flow [2024-06-27 21:23:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:23:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:23:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:23:58,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 21:23:58,697 INFO L175 Difference]: Start difference. First operand has 300 places, 410 transitions, 6153 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:23:58,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 442 transitions, 7413 flow [2024-06-27 21:23:59,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 442 transitions, 7271 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 21:23:59,637 INFO L231 Difference]: Finished difference. Result has 306 places, 418 transitions, 6536 flow [2024-06-27 21:23:59,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6536, PETRI_PLACES=306, PETRI_TRANSITIONS=418} [2024-06-27 21:23:59,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-27 21:23:59,638 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 418 transitions, 6536 flow [2024-06-27 21:23:59,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:23:59,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:23:59,638 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, 1] [2024-06-27 21:23:59,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:23:59,638 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:23:59,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:23:59,639 INFO L85 PathProgramCache]: Analyzing trace with hash 481018008, now seen corresponding path program 2 times [2024-06-27 21:23:59,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:23:59,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467875014] [2024-06-27 21:23:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:23:59,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:23:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:03,673 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 21:24:03,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:03,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467875014] [2024-06-27 21:24:03,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467875014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:03,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:24:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192565211] [2024-06-27 21:24:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:03,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:24:03,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:24:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:24:03,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:03,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 418 transitions, 6536 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:24:03,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:03,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:03,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:05,082 INFO L124 PetriNetUnfolderBase]: 2959/4633 cut-off events. [2024-06-27 21:24:05,082 INFO L125 PetriNetUnfolderBase]: For 358043/358047 co-relation queries the response was YES. [2024-06-27 21:24:05,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42993 conditions, 4633 events. 2959/4633 cut-off events. For 358043/358047 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26029 event pairs, 591 based on Foata normal form. 1/4633 useless extension candidates. Maximal degree in co-relation 42842. Up to 4324 conditions per place. [2024-06-27 21:24:05,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 65 changer transitions 0/439 dead transitions. [2024-06-27 21:24:05,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 439 transitions, 7565 flow [2024-06-27 21:24:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:24:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:24:05,148 INFO L175 Difference]: Start difference. First operand has 306 places, 418 transitions, 6536 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:24:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 439 transitions, 7565 flow [2024-06-27 21:24:06,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 439 transitions, 7298 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 21:24:06,185 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 6579 flow [2024-06-27 21:24:06,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6579, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2024-06-27 21:24:06,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-27 21:24:06,186 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 6579 flow [2024-06-27 21:24:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:24:06,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:06,186 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, 1] [2024-06-27 21:24:06,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:24:06,186 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:06,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1026632600, now seen corresponding path program 3 times [2024-06-27 21:24:06,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:06,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104649210] [2024-06-27 21:24:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:09,840 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 21:24:09,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104649210] [2024-06-27 21:24:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104649210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:09,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215469861] [2024-06-27 21:24:09,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:09,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:09,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:09,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 6579 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:09,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:09,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:09,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:11,566 INFO L124 PetriNetUnfolderBase]: 2972/4649 cut-off events. [2024-06-27 21:24:11,567 INFO L125 PetriNetUnfolderBase]: For 364281/364285 co-relation queries the response was YES. [2024-06-27 21:24:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43452 conditions, 4649 events. 2972/4649 cut-off events. For 364281/364285 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26114 event pairs, 592 based on Foata normal form. 1/4649 useless extension candidates. Maximal degree in co-relation 43300. Up to 4195 conditions per place. [2024-06-27 21:24:11,622 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 108 changer transitions 0/455 dead transitions. [2024-06-27 21:24:11,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 455 transitions, 7881 flow [2024-06-27 21:24:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:24:11,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 21:24:11,624 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 6579 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:24:11,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 455 transitions, 7881 flow [2024-06-27 21:24:12,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 455 transitions, 7739 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:12,574 INFO L231 Difference]: Finished difference. Result has 312 places, 430 transitions, 6869 flow [2024-06-27 21:24:12,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6437, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6869, PETRI_PLACES=312, PETRI_TRANSITIONS=430} [2024-06-27 21:24:12,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-27 21:24:12,574 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 430 transitions, 6869 flow [2024-06-27 21:24:12,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:12,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:12,574 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, 1] [2024-06-27 21:24:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:24:12,575 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:12,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1235074064, now seen corresponding path program 4 times [2024-06-27 21:24:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789091253] [2024-06-27 21:24:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:15,620 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 21:24:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789091253] [2024-06-27 21:24:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789091253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:15,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:15,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:15,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835068666] [2024-06-27 21:24:15,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:15,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:15,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:15,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 430 transitions, 6869 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:15,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:15,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:17,355 INFO L124 PetriNetUnfolderBase]: 2977/4672 cut-off events. [2024-06-27 21:24:17,355 INFO L125 PetriNetUnfolderBase]: For 377544/377552 co-relation queries the response was YES. [2024-06-27 21:24:17,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44173 conditions, 4672 events. 2977/4672 cut-off events. For 377544/377552 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26393 event pairs, 581 based on Foata normal form. 9/4680 useless extension candidates. Maximal degree in co-relation 44020. Up to 4421 conditions per place. [2024-06-27 21:24:17,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 417 selfloop transitions, 36 changer transitions 0/457 dead transitions. [2024-06-27 21:24:17,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 457 transitions, 7941 flow [2024-06-27 21:24:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:24:17,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:24:17,419 INFO L175 Difference]: Start difference. First operand has 312 places, 430 transitions, 6869 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:24:17,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 457 transitions, 7941 flow [2024-06-27 21:24:18,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 457 transitions, 7690 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:18,406 INFO L231 Difference]: Finished difference. Result has 316 places, 433 transitions, 6810 flow [2024-06-27 21:24:18,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6618, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6810, PETRI_PLACES=316, PETRI_TRANSITIONS=433} [2024-06-27 21:24:18,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-27 21:24:18,407 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 433 transitions, 6810 flow [2024-06-27 21:24:18,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:18,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:18,407 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, 1] [2024-06-27 21:24:18,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:24:18,407 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:18,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1229442914, now seen corresponding path program 5 times [2024-06-27 21:24:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372272850] [2024-06-27 21:24:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:21,426 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 21:24:21,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:21,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372272850] [2024-06-27 21:24:21,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372272850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:21,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:21,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188587078] [2024-06-27 21:24:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:21,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:21,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:21,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:21,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 433 transitions, 6810 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:21,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:21,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:21,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:23,266 INFO L124 PetriNetUnfolderBase]: 2990/4676 cut-off events. [2024-06-27 21:24:23,266 INFO L125 PetriNetUnfolderBase]: For 392068/392072 co-relation queries the response was YES. [2024-06-27 21:24:23,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44907 conditions, 4676 events. 2990/4676 cut-off events. For 392068/392072 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26274 event pairs, 592 based on Foata normal form. 1/4676 useless extension candidates. Maximal degree in co-relation 44752. Up to 4199 conditions per place. [2024-06-27 21:24:23,332 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 123 changer transitions 0/461 dead transitions. [2024-06-27 21:24:23,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 461 transitions, 8284 flow [2024-06-27 21:24:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:23,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:24:23,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 21:24:23,333 INFO L175 Difference]: Start difference. First operand has 316 places, 433 transitions, 6810 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:24:23,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 461 transitions, 8284 flow [2024-06-27 21:24:24,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 461 transitions, 8111 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:24,383 INFO L231 Difference]: Finished difference. Result has 320 places, 439 transitions, 7123 flow [2024-06-27 21:24:24,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6637, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7123, PETRI_PLACES=320, PETRI_TRANSITIONS=439} [2024-06-27 21:24:24,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-27 21:24:24,384 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 439 transitions, 7123 flow [2024-06-27 21:24:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:24,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:24,384 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, 1] [2024-06-27 21:24:24,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:24:24,384 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:24,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1229442573, now seen corresponding path program 1 times [2024-06-27 21:24:24,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:24,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066284245] [2024-06-27 21:24:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:24,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:27,115 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 21:24:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066284245] [2024-06-27 21:24:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066284245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:27,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:27,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913495891] [2024-06-27 21:24:27,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:27,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:27,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:27,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:27,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 439 transitions, 7123 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:27,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:27,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:27,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:29,253 INFO L124 PetriNetUnfolderBase]: 3039/4757 cut-off events. [2024-06-27 21:24:29,253 INFO L125 PetriNetUnfolderBase]: For 414851/414859 co-relation queries the response was YES. [2024-06-27 21:24:29,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46369 conditions, 4757 events. 3039/4757 cut-off events. For 414851/414859 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26818 event pairs, 581 based on Foata normal form. 10/4766 useless extension candidates. Maximal degree in co-relation 46214. Up to 4411 conditions per place. [2024-06-27 21:24:29,313 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 101 changer transitions 0/496 dead transitions. [2024-06-27 21:24:29,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 496 transitions, 8966 flow [2024-06-27 21:24:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:24:29,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 21:24:29,314 INFO L175 Difference]: Start difference. First operand has 320 places, 439 transitions, 7123 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:24:29,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 496 transitions, 8966 flow [2024-06-27 21:24:30,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 496 transitions, 8681 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 21:24:30,383 INFO L231 Difference]: Finished difference. Result has 329 places, 468 transitions, 7805 flow [2024-06-27 21:24:30,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7805, PETRI_PLACES=329, PETRI_TRANSITIONS=468} [2024-06-27 21:24:30,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 21:24:30,383 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 468 transitions, 7805 flow [2024-06-27 21:24:30,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:30,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:30,383 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, 1] [2024-06-27 21:24:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:24:30,384 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:30,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1226651829, now seen corresponding path program 2 times [2024-06-27 21:24:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:30,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469992770] [2024-06-27 21:24:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:33,435 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 21:24:33,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469992770] [2024-06-27 21:24:33,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469992770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:33,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:33,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:33,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294856203] [2024-06-27 21:24:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:33,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:33,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:33,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:33,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:33,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 468 transitions, 7805 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:33,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:33,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:33,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:35,400 INFO L124 PetriNetUnfolderBase]: 3070/4810 cut-off events. [2024-06-27 21:24:35,400 INFO L125 PetriNetUnfolderBase]: For 430215/430223 co-relation queries the response was YES. [2024-06-27 21:24:35,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 4810 events. 3070/4810 cut-off events. For 430215/430223 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27201 event pairs, 570 based on Foata normal form. 10/4819 useless extension candidates. Maximal degree in co-relation 47435. Up to 4528 conditions per place. [2024-06-27 21:24:35,473 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 441 selfloop transitions, 52 changer transitions 0/497 dead transitions. [2024-06-27 21:24:35,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 497 transitions, 9282 flow [2024-06-27 21:24:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:24:35,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:24:35,474 INFO L175 Difference]: Start difference. First operand has 329 places, 468 transitions, 7805 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:24:35,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 497 transitions, 9282 flow [2024-06-27 21:24:37,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 497 transitions, 9104 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-27 21:24:37,019 INFO L231 Difference]: Finished difference. Result has 336 places, 477 transitions, 8032 flow [2024-06-27 21:24:37,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8032, PETRI_PLACES=336, PETRI_TRANSITIONS=477} [2024-06-27 21:24:37,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 21:24:37,020 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 477 transitions, 8032 flow [2024-06-27 21:24:37,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:37,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:37,020 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, 1] [2024-06-27 21:24:37,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:24:37,020 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:37,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -670344642, now seen corresponding path program 6 times [2024-06-27 21:24:37,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:37,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468280302] [2024-06-27 21:24:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:40,939 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 21:24:40,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:40,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468280302] [2024-06-27 21:24:40,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468280302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:40,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:40,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:40,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079046428] [2024-06-27 21:24:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:40,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:40,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:40,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:40,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 477 transitions, 8032 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:40,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:40,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:40,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:43,068 INFO L124 PetriNetUnfolderBase]: 3067/4806 cut-off events. [2024-06-27 21:24:43,068 INFO L125 PetriNetUnfolderBase]: For 429423/429431 co-relation queries the response was YES. [2024-06-27 21:24:43,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47667 conditions, 4806 events. 3067/4806 cut-off events. For 429423/429431 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27228 event pairs, 582 based on Foata normal form. 9/4814 useless extension candidates. Maximal degree in co-relation 47503. Up to 4510 conditions per place. [2024-06-27 21:24:43,128 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 56 changer transitions 0/493 dead transitions. [2024-06-27 21:24:43,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 493 transitions, 9048 flow [2024-06-27 21:24:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:24:43,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-27 21:24:43,129 INFO L175 Difference]: Start difference. First operand has 336 places, 477 transitions, 8032 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:24:43,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 493 transitions, 9048 flow [2024-06-27 21:24:44,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 493 transitions, 8776 flow, removed 118 selfloop flow, removed 3 redundant places. [2024-06-27 21:24:44,392 INFO L231 Difference]: Finished difference. Result has 341 places, 477 transitions, 7879 flow [2024-06-27 21:24:44,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7879, PETRI_PLACES=341, PETRI_TRANSITIONS=477} [2024-06-27 21:24:44,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-27 21:24:44,393 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 477 transitions, 7879 flow [2024-06-27 21:24:44,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:44,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:44,393 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, 1] [2024-06-27 21:24:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:24:44,393 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:44,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1226646063, now seen corresponding path program 2 times [2024-06-27 21:24:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:44,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693375257] [2024-06-27 21:24:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:48,054 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 21:24:48,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693375257] [2024-06-27 21:24:48,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693375257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:48,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:48,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:48,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292888460] [2024-06-27 21:24:48,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:48,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:48,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:48,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 477 transitions, 7879 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:48,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:48,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:48,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:50,201 INFO L124 PetriNetUnfolderBase]: 3097/4848 cut-off events. [2024-06-27 21:24:50,201 INFO L125 PetriNetUnfolderBase]: For 445332/445340 co-relation queries the response was YES. [2024-06-27 21:24:50,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48110 conditions, 4848 events. 3097/4848 cut-off events. For 445332/445340 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27455 event pairs, 569 based on Foata normal form. 12/4859 useless extension candidates. Maximal degree in co-relation 47944. Up to 4537 conditions per place. [2024-06-27 21:24:50,266 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 437 selfloop transitions, 63 changer transitions 0/504 dead transitions. [2024-06-27 21:24:50,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 504 transitions, 9144 flow [2024-06-27 21:24:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:24:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:24:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:24:50,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-27 21:24:50,268 INFO L175 Difference]: Start difference. First operand has 341 places, 477 transitions, 7879 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:24:50,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 504 transitions, 9144 flow [2024-06-27 21:24:51,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 504 transitions, 8985 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:24:51,774 INFO L231 Difference]: Finished difference. Result has 344 places, 485 transitions, 8090 flow [2024-06-27 21:24:51,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7732, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8090, PETRI_PLACES=344, PETRI_TRANSITIONS=485} [2024-06-27 21:24:51,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-27 21:24:51,774 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 485 transitions, 8090 flow [2024-06-27 21:24:51,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:51,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:51,774 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, 1] [2024-06-27 21:24:51,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:24:51,775 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:51,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:51,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1029702685, now seen corresponding path program 3 times [2024-06-27 21:24:51,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:51,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329607990] [2024-06-27 21:24:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:51,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:24:55,595 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 21:24:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:24:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329607990] [2024-06-27 21:24:55,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329607990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:24:55,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:24:55,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:24:55,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177057082] [2024-06-27 21:24:55,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:24:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:24:55,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:24:55,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:24:55,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:24:55,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:24:55,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 485 transitions, 8090 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:55,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:24:55,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:24:55,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:24:57,483 INFO L124 PetriNetUnfolderBase]: 3091/4840 cut-off events. [2024-06-27 21:24:57,483 INFO L125 PetriNetUnfolderBase]: For 449652/449660 co-relation queries the response was YES. [2024-06-27 21:24:57,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48551 conditions, 4840 events. 3091/4840 cut-off events. For 449652/449660 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27359 event pairs, 571 based on Foata normal form. 10/4849 useless extension candidates. Maximal degree in co-relation 48383. Up to 4561 conditions per place. [2024-06-27 21:24:57,555 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 446 selfloop transitions, 53 changer transitions 0/503 dead transitions. [2024-06-27 21:24:57,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 503 transitions, 9150 flow [2024-06-27 21:24:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:24:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:24:57,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:24:57,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:24:57,557 INFO L175 Difference]: Start difference. First operand has 344 places, 485 transitions, 8090 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:24:57,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 503 transitions, 9150 flow [2024-06-27 21:24:58,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 503 transitions, 8829 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-06-27 21:24:58,911 INFO L231 Difference]: Finished difference. Result has 346 places, 485 transitions, 7882 flow [2024-06-27 21:24:58,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7882, PETRI_PLACES=346, PETRI_TRANSITIONS=485} [2024-06-27 21:24:58,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-27 21:24:58,912 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 485 transitions, 7882 flow [2024-06-27 21:24:58,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:24:58,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:24:58,912 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, 1] [2024-06-27 21:24:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:24:58,913 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:24:58,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:24:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1472731654, now seen corresponding path program 7 times [2024-06-27 21:24:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:24:58,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293074032] [2024-06-27 21:24:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:24:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:24:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:01,822 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 21:25:01,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:01,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293074032] [2024-06-27 21:25:01,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293074032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:01,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:01,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024648683] [2024-06-27 21:25:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:01,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:01,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:01,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:01,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:01,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 485 transitions, 7882 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:01,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:01,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:01,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:03,934 INFO L124 PetriNetUnfolderBase]: 3101/4843 cut-off events. [2024-06-27 21:25:03,934 INFO L125 PetriNetUnfolderBase]: For 456322/456326 co-relation queries the response was YES. [2024-06-27 21:25:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48478 conditions, 4843 events. 3101/4843 cut-off events. For 456322/456326 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27301 event pairs, 584 based on Foata normal form. 1/4843 useless extension candidates. Maximal degree in co-relation 48309. Up to 4527 conditions per place. [2024-06-27 21:25:04,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 416 selfloop transitions, 92 changer transitions 0/512 dead transitions. [2024-06-27 21:25:04,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 512 transitions, 9304 flow [2024-06-27 21:25:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:25:04,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:25:04,003 INFO L175 Difference]: Start difference. First operand has 346 places, 485 transitions, 7882 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:25:04,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 512 transitions, 9304 flow [2024-06-27 21:25:05,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 512 transitions, 9150 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:25:05,677 INFO L231 Difference]: Finished difference. Result has 351 places, 497 transitions, 8196 flow [2024-06-27 21:25:05,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7728, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8196, PETRI_PLACES=351, PETRI_TRANSITIONS=497} [2024-06-27 21:25:05,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-27 21:25:05,677 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 497 transitions, 8196 flow [2024-06-27 21:25:05,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:05,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:05,677 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, 1] [2024-06-27 21:25:05,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:25:05,678 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:05,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1472731995, now seen corresponding path program 3 times [2024-06-27 21:25:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328244603] [2024-06-27 21:25:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:09,174 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 21:25:09,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328244603] [2024-06-27 21:25:09,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328244603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:09,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:09,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795009738] [2024-06-27 21:25:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:09,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:09,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:09,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:09,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 497 transitions, 8196 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:09,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:09,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:09,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:11,655 INFO L124 PetriNetUnfolderBase]: 3142/4902 cut-off events. [2024-06-27 21:25:11,655 INFO L125 PetriNetUnfolderBase]: For 485725/485729 co-relation queries the response was YES. [2024-06-27 21:25:11,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49954 conditions, 4902 events. 3142/4902 cut-off events. For 485725/485729 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27655 event pairs, 579 based on Foata normal form. 4/4905 useless extension candidates. Maximal degree in co-relation 49783. Up to 4457 conditions per place. [2024-06-27 21:25:11,719 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 379 selfloop transitions, 147 changer transitions 0/530 dead transitions. [2024-06-27 21:25:11,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 530 transitions, 9899 flow [2024-06-27 21:25:11,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:25:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:25:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:25:11,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:25:11,720 INFO L175 Difference]: Start difference. First operand has 351 places, 497 transitions, 8196 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:25:11,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 530 transitions, 9899 flow [2024-06-27 21:25:13,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 530 transitions, 9698 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:13,371 INFO L231 Difference]: Finished difference. Result has 355 places, 510 transitions, 8769 flow [2024-06-27 21:25:13,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8010, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8769, PETRI_PLACES=355, PETRI_TRANSITIONS=510} [2024-06-27 21:25:13,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-27 21:25:13,372 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 510 transitions, 8769 flow [2024-06-27 21:25:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:13,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:13,372 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, 1] [2024-06-27 21:25:13,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:25:13,372 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:13,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1479165735, now seen corresponding path program 4 times [2024-06-27 21:25:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:13,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885025832] [2024-06-27 21:25:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:16,306 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 21:25:16,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885025832] [2024-06-27 21:25:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885025832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:16,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:16,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880701632] [2024-06-27 21:25:16,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:16,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:16,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:16,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:16,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 510 transitions, 8769 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:16,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:16,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:16,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:18,343 INFO L124 PetriNetUnfolderBase]: 3130/4886 cut-off events. [2024-06-27 21:25:18,343 INFO L125 PetriNetUnfolderBase]: For 490697/490701 co-relation queries the response was YES. [2024-06-27 21:25:18,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50152 conditions, 4886 events. 3130/4886 cut-off events. For 490697/490701 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27571 event pairs, 585 based on Foata normal form. 4/4889 useless extension candidates. Maximal degree in co-relation 49979. Up to 4552 conditions per place. [2024-06-27 21:25:18,421 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 430 selfloop transitions, 91 changer transitions 0/525 dead transitions. [2024-06-27 21:25:18,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 525 transitions, 9884 flow [2024-06-27 21:25:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:25:18,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:25:18,422 INFO L175 Difference]: Start difference. First operand has 355 places, 510 transitions, 8769 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:25:18,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 525 transitions, 9884 flow [2024-06-27 21:25:20,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 525 transitions, 9412 flow, removed 160 selfloop flow, removed 7 redundant places. [2024-06-27 21:25:20,140 INFO L231 Difference]: Finished difference. Result has 356 places, 510 transitions, 8503 flow [2024-06-27 21:25:20,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8297, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8503, PETRI_PLACES=356, PETRI_TRANSITIONS=510} [2024-06-27 21:25:20,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 21:25:20,141 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 510 transitions, 8503 flow [2024-06-27 21:25:20,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:20,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:20,141 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, 1] [2024-06-27 21:25:20,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:25:20,141 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:20,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1392888443, now seen corresponding path program 5 times [2024-06-27 21:25:20,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:20,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277064620] [2024-06-27 21:25:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:20,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:22,798 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 21:25:22,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:22,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277064620] [2024-06-27 21:25:22,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277064620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:22,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341517303] [2024-06-27 21:25:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:22,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:22,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 510 transitions, 8503 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:24,919 INFO L124 PetriNetUnfolderBase]: 3179/4965 cut-off events. [2024-06-27 21:25:24,919 INFO L125 PetriNetUnfolderBase]: For 489625/489633 co-relation queries the response was YES. [2024-06-27 21:25:24,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50752 conditions, 4965 events. 3179/4965 cut-off events. For 489625/489633 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28192 event pairs, 587 based on Foata normal form. 10/4974 useless extension candidates. Maximal degree in co-relation 50578. Up to 4701 conditions per place. [2024-06-27 21:25:24,995 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 500 selfloop transitions, 55 changer transitions 0/559 dead transitions. [2024-06-27 21:25:24,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 10294 flow [2024-06-27 21:25:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:25:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:25:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 21:25:24,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-27 21:25:24,997 INFO L175 Difference]: Start difference. First operand has 356 places, 510 transitions, 8503 flow. Second operand 10 states and 156 transitions. [2024-06-27 21:25:24,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 10294 flow [2024-06-27 21:25:26,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 559 transitions, 10114 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:26,370 INFO L231 Difference]: Finished difference. Result has 363 places, 528 transitions, 8896 flow [2024-06-27 21:25:26,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8323, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8896, PETRI_PLACES=363, PETRI_TRANSITIONS=528} [2024-06-27 21:25:26,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-27 21:25:26,371 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 528 transitions, 8896 flow [2024-06-27 21:25:26,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:26,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:26,371 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, 1] [2024-06-27 21:25:26,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:25:26,372 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:26,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash -498557631, now seen corresponding path program 4 times [2024-06-27 21:25:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:26,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268004116] [2024-06-27 21:25:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:30,024 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 21:25:30,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268004116] [2024-06-27 21:25:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268004116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:30,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:30,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314163482] [2024-06-27 21:25:30,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:30,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:30,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:30,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:30,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:30,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 528 transitions, 8896 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:30,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:30,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:30,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:32,291 INFO L124 PetriNetUnfolderBase]: 3210/5010 cut-off events. [2024-06-27 21:25:32,292 INFO L125 PetriNetUnfolderBase]: For 515927/515935 co-relation queries the response was YES. [2024-06-27 21:25:32,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52147 conditions, 5010 events. 3210/5010 cut-off events. For 515927/515935 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28406 event pairs, 583 based on Foata normal form. 10/5019 useless extension candidates. Maximal degree in co-relation 51969. Up to 4737 conditions per place. [2024-06-27 21:25:32,370 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 45 changer transitions 0/561 dead transitions. [2024-06-27 21:25:32,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 561 transitions, 10560 flow [2024-06-27 21:25:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:25:32,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-27 21:25:32,371 INFO L175 Difference]: Start difference. First operand has 363 places, 528 transitions, 8896 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:25:32,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 561 transitions, 10560 flow [2024-06-27 21:25:33,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 561 transitions, 10314 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 21:25:33,897 INFO L231 Difference]: Finished difference. Result has 369 places, 537 transitions, 9080 flow [2024-06-27 21:25:33,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9080, PETRI_PLACES=369, PETRI_TRANSITIONS=537} [2024-06-27 21:25:33,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-27 21:25:33,898 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 537 transitions, 9080 flow [2024-06-27 21:25:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:33,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:33,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:25:33,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:25:33,900 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:33,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1133868211, now seen corresponding path program 6 times [2024-06-27 21:25:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:33,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625432588] [2024-06-27 21:25:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:33,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:37,215 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 21:25:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625432588] [2024-06-27 21:25:37,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625432588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:37,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:37,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:37,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202153203] [2024-06-27 21:25:37,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:37,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:37,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:37,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 537 transitions, 9080 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:37,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:37,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:37,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:39,708 INFO L124 PetriNetUnfolderBase]: 3285/5113 cut-off events. [2024-06-27 21:25:39,708 INFO L125 PetriNetUnfolderBase]: For 556241/556249 co-relation queries the response was YES. [2024-06-27 21:25:39,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54194 conditions, 5113 events. 3285/5113 cut-off events. For 556241/556249 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 28990 event pairs, 585 based on Foata normal form. 12/5124 useless extension candidates. Maximal degree in co-relation 54014. Up to 4666 conditions per place. [2024-06-27 21:25:39,786 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 475 selfloop transitions, 109 changer transitions 0/588 dead transitions. [2024-06-27 21:25:39,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 588 transitions, 10956 flow [2024-06-27 21:25:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:25:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:25:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 21:25:39,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 21:25:39,787 INFO L175 Difference]: Start difference. First operand has 369 places, 537 transitions, 9080 flow. Second operand 12 states and 189 transitions. [2024-06-27 21:25:39,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 588 transitions, 10956 flow [2024-06-27 21:25:41,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 588 transitions, 10722 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-27 21:25:41,598 INFO L231 Difference]: Finished difference. Result has 379 places, 554 transitions, 9562 flow [2024-06-27 21:25:41,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9562, PETRI_PLACES=379, PETRI_TRANSITIONS=554} [2024-06-27 21:25:41,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-27 21:25:41,599 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 554 transitions, 9562 flow [2024-06-27 21:25:41,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:41,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:41,600 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, 1] [2024-06-27 21:25:41,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:25:41,600 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:41,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1633298983, now seen corresponding path program 7 times [2024-06-27 21:25:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:41,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302550273] [2024-06-27 21:25:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:41,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:45,160 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 21:25:45,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:45,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302550273] [2024-06-27 21:25:45,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302550273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:45,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:45,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:45,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223625977] [2024-06-27 21:25:45,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:45,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:45,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:45,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 554 transitions, 9562 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:45,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:45,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:45,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:47,202 INFO L124 PetriNetUnfolderBase]: 3294/5122 cut-off events. [2024-06-27 21:25:47,202 INFO L125 PetriNetUnfolderBase]: For 567087/567095 co-relation queries the response was YES. [2024-06-27 21:25:47,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54928 conditions, 5122 events. 3294/5122 cut-off events. For 567087/567095 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29000 event pairs, 592 based on Foata normal form. 12/5133 useless extension candidates. Maximal degree in co-relation 54745. Up to 4849 conditions per place. [2024-06-27 21:25:47,273 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 534 selfloop transitions, 43 changer transitions 0/581 dead transitions. [2024-06-27 21:25:47,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 581 transitions, 10937 flow [2024-06-27 21:25:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:25:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:25:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:25:47,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:25:47,275 INFO L175 Difference]: Start difference. First operand has 379 places, 554 transitions, 9562 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:25:47,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 581 transitions, 10937 flow [2024-06-27 21:25:48,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 581 transitions, 10601 flow, removed 138 selfloop flow, removed 8 redundant places. [2024-06-27 21:25:48,789 INFO L231 Difference]: Finished difference. Result has 380 places, 560 transitions, 9503 flow [2024-06-27 21:25:48,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9274, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9503, PETRI_PLACES=380, PETRI_TRANSITIONS=560} [2024-06-27 21:25:48,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-27 21:25:48,789 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 560 transitions, 9503 flow [2024-06-27 21:25:48,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:48,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:48,790 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, 1] [2024-06-27 21:25:48,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:25:48,790 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:48,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash 847367725, now seen corresponding path program 8 times [2024-06-27 21:25:48,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:48,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400994805] [2024-06-27 21:25:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:51,392 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 21:25:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400994805] [2024-06-27 21:25:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400994805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572250935] [2024-06-27 21:25:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:51,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:51,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:51,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 560 transitions, 9503 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:51,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:51,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:51,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:25:53,641 INFO L124 PetriNetUnfolderBase]: 3336/5186 cut-off events. [2024-06-27 21:25:53,641 INFO L125 PetriNetUnfolderBase]: For 569436/569444 co-relation queries the response was YES. [2024-06-27 21:25:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 5186 events. 3336/5186 cut-off events. For 569436/569444 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29390 event pairs, 597 based on Foata normal form. 10/5195 useless extension candidates. Maximal degree in co-relation 55433. Up to 4645 conditions per place. [2024-06-27 21:25:53,727 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 455 selfloop transitions, 159 changer transitions 0/618 dead transitions. [2024-06-27 21:25:53,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 618 transitions, 12006 flow [2024-06-27 21:25:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:25:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:25:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:25:53,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-27 21:25:53,728 INFO L175 Difference]: Start difference. First operand has 380 places, 560 transitions, 9503 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:25:53,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 618 transitions, 12006 flow [2024-06-27 21:25:55,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 618 transitions, 11830 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 21:25:55,534 INFO L231 Difference]: Finished difference. Result has 386 places, 586 transitions, 10461 flow [2024-06-27 21:25:55,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9327, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10461, PETRI_PLACES=386, PETRI_TRANSITIONS=586} [2024-06-27 21:25:55,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 21:25:55,535 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 586 transitions, 10461 flow [2024-06-27 21:25:55,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:55,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:25:55,536 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, 1] [2024-06-27 21:25:55,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:25:55,536 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:25:55,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:25:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2050030341, now seen corresponding path program 5 times [2024-06-27 21:25:55,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:25:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039139394] [2024-06-27 21:25:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:25:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:25:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:25:58,972 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 21:25:58,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:25:58,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039139394] [2024-06-27 21:25:58,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039139394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:25:58,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:25:58,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:25:58,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058787190] [2024-06-27 21:25:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:25:58,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:25:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:25:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:25:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:25:58,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:25:58,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 586 transitions, 10461 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:25:58,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:25:58,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:25:58,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:01,324 INFO L124 PetriNetUnfolderBase]: 3382/5256 cut-off events. [2024-06-27 21:26:01,325 INFO L125 PetriNetUnfolderBase]: For 608432/608440 co-relation queries the response was YES. [2024-06-27 21:26:01,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57808 conditions, 5256 events. 3382/5256 cut-off events. For 608432/608440 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29885 event pairs, 594 based on Foata normal form. 12/5267 useless extension candidates. Maximal degree in co-relation 57621. Up to 4914 conditions per place. [2024-06-27 21:26:01,406 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 64 changer transitions 0/627 dead transitions. [2024-06-27 21:26:01,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 627 transitions, 12621 flow [2024-06-27 21:26:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:26:01,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-27 21:26:01,407 INFO L175 Difference]: Start difference. First operand has 386 places, 586 transitions, 10461 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:26:01,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 627 transitions, 12621 flow [2024-06-27 21:26:03,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 627 transitions, 12365 flow, removed 118 selfloop flow, removed 2 redundant places. [2024-06-27 21:26:03,440 INFO L231 Difference]: Finished difference. Result has 395 places, 600 transitions, 10886 flow [2024-06-27 21:26:03,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10205, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10886, PETRI_PLACES=395, PETRI_TRANSITIONS=600} [2024-06-27 21:26:03,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-27 21:26:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 600 transitions, 10886 flow [2024-06-27 21:26:03,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:03,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:03,441 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, 1] [2024-06-27 21:26:03,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:26:03,441 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:03,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1458609331, now seen corresponding path program 9 times [2024-06-27 21:26:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395390770] [2024-06-27 21:26:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:06,226 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 21:26:06,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:06,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395390770] [2024-06-27 21:26:06,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395390770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:06,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:06,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252044465] [2024-06-27 21:26:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:06,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:06,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:06,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 600 transitions, 10886 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:06,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:06,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:06,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:08,376 INFO L124 PetriNetUnfolderBase]: 3376/5248 cut-off events. [2024-06-27 21:26:08,376 INFO L125 PetriNetUnfolderBase]: For 612094/612102 co-relation queries the response was YES. [2024-06-27 21:26:08,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58071 conditions, 5248 events. 3376/5248 cut-off events. For 612094/612102 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29895 event pairs, 601 based on Foata normal form. 10/5257 useless extension candidates. Maximal degree in co-relation 57879. Up to 4935 conditions per place. [2024-06-27 21:26:08,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 545 selfloop transitions, 73 changer transitions 0/622 dead transitions. [2024-06-27 21:26:08,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 622 transitions, 12186 flow [2024-06-27 21:26:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:26:08,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-27 21:26:08,463 INFO L175 Difference]: Start difference. First operand has 395 places, 600 transitions, 10886 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:26:08,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 622 transitions, 12186 flow [2024-06-27 21:26:10,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 622 transitions, 11834 flow, removed 159 selfloop flow, removed 4 redundant places. [2024-06-27 21:26:10,847 INFO L231 Difference]: Finished difference. Result has 400 places, 600 transitions, 10686 flow [2024-06-27 21:26:10,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10534, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10686, PETRI_PLACES=400, PETRI_TRANSITIONS=600} [2024-06-27 21:26:10,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-27 21:26:10,848 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 600 transitions, 10686 flow [2024-06-27 21:26:10,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:10,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:10,848 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, 1] [2024-06-27 21:26:10,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:26:10,848 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:10,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash -156269271, now seen corresponding path program 6 times [2024-06-27 21:26:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:10,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486010218] [2024-06-27 21:26:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:14,754 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 21:26:14,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486010218] [2024-06-27 21:26:14,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486010218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:14,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:14,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:14,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025100973] [2024-06-27 21:26:14,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:14,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:14,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:14,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 600 transitions, 10686 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:17,465 INFO L124 PetriNetUnfolderBase]: 3402/5298 cut-off events. [2024-06-27 21:26:17,465 INFO L125 PetriNetUnfolderBase]: For 629601/629609 co-relation queries the response was YES. [2024-06-27 21:26:17,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58778 conditions, 5298 events. 3402/5298 cut-off events. For 629601/629609 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30297 event pairs, 600 based on Foata normal form. 10/5307 useless extension candidates. Maximal degree in co-relation 58584. Up to 4985 conditions per place. [2024-06-27 21:26:17,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 566 selfloop transitions, 61 changer transitions 0/631 dead transitions. [2024-06-27 21:26:17,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 631 transitions, 12540 flow [2024-06-27 21:26:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:26:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:26:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-06-27 21:26:17,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34811529933481156 [2024-06-27 21:26:17,539 INFO L175 Difference]: Start difference. First operand has 400 places, 600 transitions, 10686 flow. Second operand 11 states and 157 transitions. [2024-06-27 21:26:17,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 631 transitions, 12540 flow [2024-06-27 21:26:19,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 631 transitions, 12428 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:19,558 INFO L231 Difference]: Finished difference. Result has 407 places, 608 transitions, 11062 flow [2024-06-27 21:26:19,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11062, PETRI_PLACES=407, PETRI_TRANSITIONS=608} [2024-06-27 21:26:19,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 21:26:19,559 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 608 transitions, 11062 flow [2024-06-27 21:26:19,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:19,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:19,559 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, 1] [2024-06-27 21:26:19,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:26:19,559 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:19,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -156263505, now seen corresponding path program 10 times [2024-06-27 21:26:19,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:19,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138956118] [2024-06-27 21:26:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:23,357 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 21:26:23,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:23,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138956118] [2024-06-27 21:26:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138956118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:23,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:23,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:26:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209928649] [2024-06-27 21:26:23,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:26:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:26:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:26:23,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:23,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 608 transitions, 11062 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:26:23,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:23,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:23,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:25,582 INFO L124 PetriNetUnfolderBase]: 3417/5311 cut-off events. [2024-06-27 21:26:25,582 INFO L125 PetriNetUnfolderBase]: For 649284/649292 co-relation queries the response was YES. [2024-06-27 21:26:25,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59468 conditions, 5311 events. 3417/5311 cut-off events. For 649284/649292 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 30310 event pairs, 593 based on Foata normal form. 10/5320 useless extension candidates. Maximal degree in co-relation 59272. Up to 5021 conditions per place. [2024-06-27 21:26:25,884 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 575 selfloop transitions, 55 changer transitions 0/634 dead transitions. [2024-06-27 21:26:25,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 634 transitions, 12521 flow [2024-06-27 21:26:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:26:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:26:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-27 21:26:25,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35121951219512193 [2024-06-27 21:26:25,885 INFO L175 Difference]: Start difference. First operand has 407 places, 608 transitions, 11062 flow. Second operand 10 states and 144 transitions. [2024-06-27 21:26:25,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 634 transitions, 12521 flow [2024-06-27 21:26:28,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 634 transitions, 12234 flow, removed 111 selfloop flow, removed 6 redundant places. [2024-06-27 21:26:28,067 INFO L231 Difference]: Finished difference. Result has 412 places, 614 transitions, 11037 flow [2024-06-27 21:26:28,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10775, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11037, PETRI_PLACES=412, PETRI_TRANSITIONS=614} [2024-06-27 21:26:28,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-27 21:26:28,067 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 614 transitions, 11037 flow [2024-06-27 21:26:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:26:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:28,068 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, 1] [2024-06-27 21:26:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:26:28,068 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:28,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash -144057255, now seen corresponding path program 11 times [2024-06-27 21:26:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772126941] [2024-06-27 21:26:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:31,775 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 21:26:31,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:31,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772126941] [2024-06-27 21:26:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772126941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:31,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:31,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:31,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574199500] [2024-06-27 21:26:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:31,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:31,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 614 transitions, 11037 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:31,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:31,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:31,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:33,762 INFO L124 PetriNetUnfolderBase]: 3493/5419 cut-off events. [2024-06-27 21:26:33,762 INFO L125 PetriNetUnfolderBase]: For 666811/666819 co-relation queries the response was YES. [2024-06-27 21:26:33,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60698 conditions, 5419 events. 3493/5419 cut-off events. For 666811/666819 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30918 event pairs, 566 based on Foata normal form. 10/5428 useless extension candidates. Maximal degree in co-relation 60499. Up to 5015 conditions per place. [2024-06-27 21:26:33,855 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 85 changer transitions 0/652 dead transitions. [2024-06-27 21:26:33,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 652 transitions, 13035 flow [2024-06-27 21:26:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:26:33,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-27 21:26:33,856 INFO L175 Difference]: Start difference. First operand has 412 places, 614 transitions, 11037 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:26:33,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 652 transitions, 13035 flow [2024-06-27 21:26:36,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 652 transitions, 12781 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-27 21:26:36,248 INFO L231 Difference]: Finished difference. Result has 415 places, 631 transitions, 11458 flow [2024-06-27 21:26:36,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10858, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11458, PETRI_PLACES=415, PETRI_TRANSITIONS=631} [2024-06-27 21:26:36,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-27 21:26:36,249 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 631 transitions, 11458 flow [2024-06-27 21:26:36,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:36,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:36,249 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, 1] [2024-06-27 21:26:36,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:26:36,249 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:36,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -156259041, now seen corresponding path program 7 times [2024-06-27 21:26:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:36,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189529181] [2024-06-27 21:26:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:36,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:40,290 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 21:26:40,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:40,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189529181] [2024-06-27 21:26:40,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189529181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:40,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:40,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122481168] [2024-06-27 21:26:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:40,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:40,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:40,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:40,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:40,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 631 transitions, 11458 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:40,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:40,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:40,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:42,568 INFO L124 PetriNetUnfolderBase]: 3487/5411 cut-off events. [2024-06-27 21:26:42,568 INFO L125 PetriNetUnfolderBase]: For 676912/676920 co-relation queries the response was YES. [2024-06-27 21:26:42,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60938 conditions, 5411 events. 3487/5411 cut-off events. For 676912/676920 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30947 event pairs, 605 based on Foata normal form. 10/5420 useless extension candidates. Maximal degree in co-relation 60737. Up to 5107 conditions per place. [2024-06-27 21:26:42,874 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 586 selfloop transitions, 60 changer transitions 0/650 dead transitions. [2024-06-27 21:26:42,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 650 transitions, 12818 flow [2024-06-27 21:26:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:26:42,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:26:42,875 INFO L175 Difference]: Start difference. First operand has 415 places, 631 transitions, 11458 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:26:42,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 650 transitions, 12818 flow [2024-06-27 21:26:45,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 650 transitions, 12467 flow, removed 135 selfloop flow, removed 5 redundant places. [2024-06-27 21:26:45,354 INFO L231 Difference]: Finished difference. Result has 419 places, 631 transitions, 11233 flow [2024-06-27 21:26:45,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11107, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11233, PETRI_PLACES=419, PETRI_TRANSITIONS=631} [2024-06-27 21:26:45,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 21:26:45,355 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 631 transitions, 11233 flow [2024-06-27 21:26:45,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:45,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:45,355 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, 1] [2024-06-27 21:26:45,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:26:45,356 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:45,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:45,357 INFO L85 PathProgramCache]: Analyzing trace with hash -144294405, now seen corresponding path program 12 times [2024-06-27 21:26:45,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:45,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550357651] [2024-06-27 21:26:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:45,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:48,955 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 21:26:48,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550357651] [2024-06-27 21:26:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550357651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:48,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:48,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261465043] [2024-06-27 21:26:48,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:48,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:48,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 631 transitions, 11233 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:48,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:48,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:48,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:50,954 INFO L124 PetriNetUnfolderBase]: 3481/5403 cut-off events. [2024-06-27 21:26:50,954 INFO L125 PetriNetUnfolderBase]: For 675600/675608 co-relation queries the response was YES. [2024-06-27 21:26:51,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60488 conditions, 5403 events. 3481/5403 cut-off events. For 675600/675608 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30853 event pairs, 564 based on Foata normal form. 10/5412 useless extension candidates. Maximal degree in co-relation 60285. Up to 5066 conditions per place. [2024-06-27 21:26:51,048 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 578 selfloop transitions, 69 changer transitions 0/651 dead transitions. [2024-06-27 21:26:51,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 651 transitions, 12609 flow [2024-06-27 21:26:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 21:26:51,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-27 21:26:51,050 INFO L175 Difference]: Start difference. First operand has 419 places, 631 transitions, 11233 flow. Second operand 9 states and 136 transitions. [2024-06-27 21:26:51,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 651 transitions, 12609 flow [2024-06-27 21:26:53,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 651 transitions, 12437 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 21:26:53,218 INFO L231 Difference]: Finished difference. Result has 420 places, 631 transitions, 11205 flow [2024-06-27 21:26:53,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11061, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11205, PETRI_PLACES=420, PETRI_TRANSITIONS=631} [2024-06-27 21:26:53,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 21:26:53,218 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 631 transitions, 11205 flow [2024-06-27 21:26:53,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:53,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:53,219 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, 1] [2024-06-27 21:26:53,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:26:53,219 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:53,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -755922147, now seen corresponding path program 8 times [2024-06-27 21:26:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:53,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703649243] [2024-06-27 21:26:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:57,301 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 21:26:57,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:57,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703649243] [2024-06-27 21:26:57,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703649243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:57,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:57,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:26:57,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630542465] [2024-06-27 21:26:57,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:26:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:26:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:26:57,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:26:57,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 631 transitions, 11205 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:26:57,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:57,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:26:57,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:59,453 INFO L124 PetriNetUnfolderBase]: 3475/5395 cut-off events. [2024-06-27 21:26:59,453 INFO L125 PetriNetUnfolderBase]: For 678945/678953 co-relation queries the response was YES. [2024-06-27 21:26:59,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60270 conditions, 5395 events. 3475/5395 cut-off events. For 678945/678953 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30822 event pairs, 570 based on Foata normal form. 10/5404 useless extension candidates. Maximal degree in co-relation 60066. Up to 5001 conditions per place. [2024-06-27 21:26:59,546 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 88 changer transitions 0/654 dead transitions. [2024-06-27 21:26:59,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 654 transitions, 12757 flow [2024-06-27 21:26:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:26:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:26:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 21:26:59,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-27 21:26:59,548 INFO L175 Difference]: Start difference. First operand has 420 places, 631 transitions, 11205 flow. Second operand 9 states and 136 transitions. [2024-06-27 21:26:59,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 654 transitions, 12757 flow [2024-06-27 21:27:01,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 654 transitions, 12603 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:01,736 INFO L231 Difference]: Finished difference. Result has 422 places, 634 transitions, 11409 flow [2024-06-27 21:27:01,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11051, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11409, PETRI_PLACES=422, PETRI_TRANSITIONS=634} [2024-06-27 21:27:01,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-27 21:27:01,737 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 634 transitions, 11409 flow [2024-06-27 21:27:01,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:01,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:01,737 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, 1] [2024-06-27 21:27:01,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:27:01,738 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -760539411, now seen corresponding path program 13 times [2024-06-27 21:27:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:01,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453895677] [2024-06-27 21:27:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:05,473 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 21:27:05,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453895677] [2024-06-27 21:27:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453895677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:05,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:05,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:05,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051916909] [2024-06-27 21:27:05,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:05,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:05,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:05,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 634 transitions, 11409 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:05,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:05,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:05,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:07,921 INFO L124 PetriNetUnfolderBase]: 3469/5385 cut-off events. [2024-06-27 21:27:07,921 INFO L125 PetriNetUnfolderBase]: For 687999/688007 co-relation queries the response was YES. [2024-06-27 21:27:07,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60446 conditions, 5385 events. 3469/5385 cut-off events. For 687999/688007 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30741 event pairs, 604 based on Foata normal form. 10/5394 useless extension candidates. Maximal degree in co-relation 60241. Up to 5063 conditions per place. [2024-06-27 21:27:08,017 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 575 selfloop transitions, 74 changer transitions 0/653 dead transitions. [2024-06-27 21:27:08,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 653 transitions, 12763 flow [2024-06-27 21:27:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 21:27:08,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-27 21:27:08,018 INFO L175 Difference]: Start difference. First operand has 422 places, 634 transitions, 11409 flow. Second operand 10 states and 146 transitions. [2024-06-27 21:27:08,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 653 transitions, 12763 flow [2024-06-27 21:27:10,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 653 transitions, 12373 flow, removed 109 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:10,317 INFO L231 Difference]: Finished difference. Result has 425 places, 634 transitions, 11183 flow [2024-06-27 21:27:10,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11019, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11183, PETRI_PLACES=425, PETRI_TRANSITIONS=634} [2024-06-27 21:27:10,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-27 21:27:10,318 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 634 transitions, 11183 flow [2024-06-27 21:27:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:10,318 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, 1] [2024-06-27 21:27:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:27:10,318 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:10,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -760153461, now seen corresponding path program 14 times [2024-06-27 21:27:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849981254] [2024-06-27 21:27:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:13,602 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 21:27:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849981254] [2024-06-27 21:27:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849981254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:13,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72077955] [2024-06-27 21:27:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:13,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:13,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 634 transitions, 11183 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:13,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:13,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:13,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:16,067 INFO L124 PetriNetUnfolderBase]: 3463/5379 cut-off events. [2024-06-27 21:27:16,067 INFO L125 PetriNetUnfolderBase]: For 685986/685994 co-relation queries the response was YES. [2024-06-27 21:27:16,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59873 conditions, 5379 events. 3463/5379 cut-off events. For 685986/685994 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30751 event pairs, 568 based on Foata normal form. 10/5388 useless extension candidates. Maximal degree in co-relation 59667. Up to 4903 conditions per place. [2024-06-27 21:27:16,164 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 540 selfloop transitions, 111 changer transitions 0/655 dead transitions. [2024-06-27 21:27:16,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 655 transitions, 12691 flow [2024-06-27 21:27:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:27:16,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 21:27:16,166 INFO L175 Difference]: Start difference. First operand has 425 places, 634 transitions, 11183 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:27:16,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 655 transitions, 12691 flow [2024-06-27 21:27:18,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 655 transitions, 12524 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 21:27:18,833 INFO L231 Difference]: Finished difference. Result has 424 places, 637 transitions, 11400 flow [2024-06-27 21:27:18,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11016, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11400, PETRI_PLACES=424, PETRI_TRANSITIONS=637} [2024-06-27 21:27:18,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-27 21:27:18,834 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 637 transitions, 11400 flow [2024-06-27 21:27:18,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:18,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:18,834 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, 1] [2024-06-27 21:27:18,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:27:18,835 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:18,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -201990301, now seen corresponding path program 15 times [2024-06-27 21:27:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:18,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321297813] [2024-06-27 21:27:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:18,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:22,008 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 21:27:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321297813] [2024-06-27 21:27:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321297813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:22,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959015905] [2024-06-27 21:27:22,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:22,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:22,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:22,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 637 transitions, 11400 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:22,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:22,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:22,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:24,169 INFO L124 PetriNetUnfolderBase]: 3540/5474 cut-off events. [2024-06-27 21:27:24,169 INFO L125 PetriNetUnfolderBase]: For 699183/699187 co-relation queries the response was YES. [2024-06-27 21:27:24,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61748 conditions, 5474 events. 3540/5474 cut-off events. For 699183/699187 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31165 event pairs, 603 based on Foata normal form. 2/5475 useless extension candidates. Maximal degree in co-relation 61543. Up to 5011 conditions per place. [2024-06-27 21:27:24,263 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 521 selfloop transitions, 156 changer transitions 0/681 dead transitions. [2024-06-27 21:27:24,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 681 transitions, 13777 flow [2024-06-27 21:27:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:27:24,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-27 21:27:24,265 INFO L175 Difference]: Start difference. First operand has 424 places, 637 transitions, 11400 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:27:24,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 681 transitions, 13777 flow [2024-06-27 21:27:26,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 681 transitions, 13421 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-27 21:27:26,678 INFO L231 Difference]: Finished difference. Result has 427 places, 663 transitions, 12144 flow [2024-06-27 21:27:26,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11056, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12144, PETRI_PLACES=427, PETRI_TRANSITIONS=663} [2024-06-27 21:27:26,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-27 21:27:26,678 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 663 transitions, 12144 flow [2024-06-27 21:27:26,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:26,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:26,679 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, 1] [2024-06-27 21:27:26,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:27:26,679 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:26,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash -753211909, now seen corresponding path program 16 times [2024-06-27 21:27:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502045463] [2024-06-27 21:27:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:29,638 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 21:27:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:29,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502045463] [2024-06-27 21:27:29,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502045463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:29,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:29,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:29,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482318981] [2024-06-27 21:27:29,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:29,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:29,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:29,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 663 transitions, 12144 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:29,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:29,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:29,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:31,807 INFO L124 PetriNetUnfolderBase]: 3544/5486 cut-off events. [2024-06-27 21:27:31,807 INFO L125 PetriNetUnfolderBase]: For 678772/678776 co-relation queries the response was YES. [2024-06-27 21:27:31,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61643 conditions, 5486 events. 3544/5486 cut-off events. For 678772/678776 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31292 event pairs, 612 based on Foata normal form. 4/5489 useless extension candidates. Maximal degree in co-relation 61437. Up to 4983 conditions per place. [2024-06-27 21:27:31,910 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 167 changer transitions 0/685 dead transitions. [2024-06-27 21:27:31,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 685 transitions, 13946 flow [2024-06-27 21:27:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:27:31,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-27 21:27:31,912 INFO L175 Difference]: Start difference. First operand has 427 places, 663 transitions, 12144 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:27:31,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 685 transitions, 13946 flow [2024-06-27 21:27:34,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 685 transitions, 13697 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:34,287 INFO L231 Difference]: Finished difference. Result has 433 places, 666 transitions, 12422 flow [2024-06-27 21:27:34,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11895, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12422, PETRI_PLACES=433, PETRI_TRANSITIONS=666} [2024-06-27 21:27:34,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-27 21:27:34,288 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 666 transitions, 12422 flow [2024-06-27 21:27:34,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:34,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:34,289 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, 1] [2024-06-27 21:27:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:27:34,289 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:34,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:34,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1681160743, now seen corresponding path program 17 times [2024-06-27 21:27:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:34,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631924236] [2024-06-27 21:27:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:34,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:37,147 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 21:27:37,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:37,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631924236] [2024-06-27 21:27:37,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631924236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:37,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:37,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:37,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506965412] [2024-06-27 21:27:37,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:37,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:37,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:37,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:37,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 666 transitions, 12422 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:37,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:37,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:37,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:39,583 INFO L124 PetriNetUnfolderBase]: 3569/5523 cut-off events. [2024-06-27 21:27:39,583 INFO L125 PetriNetUnfolderBase]: For 701663/701667 co-relation queries the response was YES. [2024-06-27 21:27:39,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62932 conditions, 5523 events. 3569/5523 cut-off events. For 701663/701667 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 31504 event pairs, 614 based on Foata normal form. 4/5526 useless extension candidates. Maximal degree in co-relation 62724. Up to 5173 conditions per place. [2024-06-27 21:27:39,669 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 608 selfloop transitions, 88 changer transitions 0/700 dead transitions. [2024-06-27 21:27:39,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 700 transitions, 14445 flow [2024-06-27 21:27:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:27:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:27:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:27:39,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:27:39,671 INFO L175 Difference]: Start difference. First operand has 433 places, 666 transitions, 12422 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:27:39,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 700 transitions, 14445 flow [2024-06-27 21:27:42,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 700 transitions, 13822 flow, removed 146 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:42,140 INFO L231 Difference]: Finished difference. Result has 436 places, 676 transitions, 12395 flow [2024-06-27 21:27:42,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11811, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12395, PETRI_PLACES=436, PETRI_TRANSITIONS=676} [2024-06-27 21:27:42,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 21:27:42,140 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 676 transitions, 12395 flow [2024-06-27 21:27:42,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:42,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:42,141 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, 1] [2024-06-27 21:27:42,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:27:42,141 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:42,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1681397893, now seen corresponding path program 18 times [2024-06-27 21:27:42,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:42,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387298001] [2024-06-27 21:27:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:44,912 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 21:27:44,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387298001] [2024-06-27 21:27:44,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387298001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:44,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:44,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:44,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668564973] [2024-06-27 21:27:44,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:44,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:44,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:44,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:44,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:44,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 676 transitions, 12395 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:44,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:44,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:47,281 INFO L124 PetriNetUnfolderBase]: 3649/5634 cut-off events. [2024-06-27 21:27:47,281 INFO L125 PetriNetUnfolderBase]: For 735134/735138 co-relation queries the response was YES. [2024-06-27 21:27:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64977 conditions, 5634 events. 3649/5634 cut-off events. For 735134/735138 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 32213 event pairs, 609 based on Foata normal form. 2/5635 useless extension candidates. Maximal degree in co-relation 64767. Up to 5200 conditions per place. [2024-06-27 21:27:47,380 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 585 selfloop transitions, 136 changer transitions 0/725 dead transitions. [2024-06-27 21:27:47,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 725 transitions, 15089 flow [2024-06-27 21:27:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 21:27:47,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:27:47,382 INFO L175 Difference]: Start difference. First operand has 436 places, 676 transitions, 12395 flow. Second operand 10 states and 150 transitions. [2024-06-27 21:27:47,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 725 transitions, 15089 flow [2024-06-27 21:27:50,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 725 transitions, 14703 flow, removed 131 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:50,041 INFO L231 Difference]: Finished difference. Result has 444 places, 706 transitions, 13283 flow [2024-06-27 21:27:50,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12009, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13283, PETRI_PLACES=444, PETRI_TRANSITIONS=706} [2024-06-27 21:27:50,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-27 21:27:50,042 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 706 transitions, 13283 flow [2024-06-27 21:27:50,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:50,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:50,042 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, 1] [2024-06-27 21:27:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:27:50,043 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:50,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash -206844901, now seen corresponding path program 19 times [2024-06-27 21:27:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:50,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907497938] [2024-06-27 21:27:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:53,145 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 21:27:53,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907497938] [2024-06-27 21:27:53,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907497938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:53,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:53,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:27:53,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73441239] [2024-06-27 21:27:53,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:53,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:27:53,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:27:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:27:53,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:27:53,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 706 transitions, 13283 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:53,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:53,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:27:53,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:55,768 INFO L124 PetriNetUnfolderBase]: 3667/5660 cut-off events. [2024-06-27 21:27:55,768 INFO L125 PetriNetUnfolderBase]: For 769155/769159 co-relation queries the response was YES. [2024-06-27 21:27:55,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65637 conditions, 5660 events. 3667/5660 cut-off events. For 769155/769159 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32367 event pairs, 619 based on Foata normal form. 8/5667 useless extension candidates. Maximal degree in co-relation 65423. Up to 5333 conditions per place. [2024-06-27 21:27:55,872 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 635 selfloop transitions, 95 changer transitions 0/734 dead transitions. [2024-06-27 21:27:55,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 734 transitions, 15174 flow [2024-06-27 21:27:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:27:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:27:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 21:27:55,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35609756097560974 [2024-06-27 21:27:55,873 INFO L175 Difference]: Start difference. First operand has 444 places, 706 transitions, 13283 flow. Second operand 10 states and 146 transitions. [2024-06-27 21:27:55,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 734 transitions, 15174 flow [2024-06-27 21:27:59,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 734 transitions, 14759 flow, removed 177 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:59,042 INFO L231 Difference]: Finished difference. Result has 450 places, 715 transitions, 13445 flow [2024-06-27 21:27:59,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12868, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13445, PETRI_PLACES=450, PETRI_TRANSITIONS=715} [2024-06-27 21:27:59,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-27 21:27:59,042 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 715 transitions, 13445 flow [2024-06-27 21:27:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:27:59,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:59,042 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, 1] [2024-06-27 21:27:59,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:27:59,043 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:59,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash -206458951, now seen corresponding path program 20 times [2024-06-27 21:27:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:59,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269292420] [2024-06-27 21:27:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:02,001 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 21:28:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269292420] [2024-06-27 21:28:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269292420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641631921] [2024-06-27 21:28:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:02,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:02,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 715 transitions, 13445 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:02,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:02,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:04,393 INFO L124 PetriNetUnfolderBase]: 3671/5667 cut-off events. [2024-06-27 21:28:04,393 INFO L125 PetriNetUnfolderBase]: For 751233/751237 co-relation queries the response was YES. [2024-06-27 21:28:04,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65629 conditions, 5667 events. 3671/5667 cut-off events. For 751233/751237 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32407 event pairs, 604 based on Foata normal form. 2/5668 useless extension candidates. Maximal degree in co-relation 65413. Up to 5068 conditions per place. [2024-06-27 21:28:04,490 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 521 selfloop transitions, 213 changer transitions 0/738 dead transitions. [2024-06-27 21:28:04,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 738 transitions, 15400 flow [2024-06-27 21:28:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:28:04,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-27 21:28:04,492 INFO L175 Difference]: Start difference. First operand has 450 places, 715 transitions, 13445 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:28:04,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 738 transitions, 15400 flow [2024-06-27 21:28:07,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 738 transitions, 14819 flow, removed 148 selfloop flow, removed 9 redundant places. [2024-06-27 21:28:07,294 INFO L231 Difference]: Finished difference. Result has 452 places, 718 transitions, 13355 flow [2024-06-27 21:28:07,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12864, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13355, PETRI_PLACES=452, PETRI_TRANSITIONS=718} [2024-06-27 21:28:07,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-27 21:28:07,295 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 718 transitions, 13355 flow [2024-06-27 21:28:07,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:07,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:07,295 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, 1] [2024-06-27 21:28:07,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:28:07,295 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:07,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1352779411, now seen corresponding path program 1 times [2024-06-27 21:28:07,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:07,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107241651] [2024-06-27 21:28:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:10,001 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 21:28:10,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:10,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107241651] [2024-06-27 21:28:10,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107241651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:10,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:10,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715293452] [2024-06-27 21:28:10,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:10,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:10,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:10,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 718 transitions, 13355 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:10,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:10,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:10,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:12,441 INFO L124 PetriNetUnfolderBase]: 3659/5656 cut-off events. [2024-06-27 21:28:12,441 INFO L125 PetriNetUnfolderBase]: For 746879/746883 co-relation queries the response was YES. [2024-06-27 21:28:12,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64846 conditions, 5656 events. 3659/5656 cut-off events. For 746879/746883 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32433 event pairs, 616 based on Foata normal form. 4/5659 useless extension candidates. Maximal degree in co-relation 64630. Up to 5323 conditions per place. [2024-06-27 21:28:12,545 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 634 selfloop transitions, 95 changer transitions 0/733 dead transitions. [2024-06-27 21:28:12,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 733 transitions, 14902 flow [2024-06-27 21:28:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:28:12,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-27 21:28:12,546 INFO L175 Difference]: Start difference. First operand has 452 places, 718 transitions, 13355 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:28:12,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 733 transitions, 14902 flow [2024-06-27 21:28:15,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 733 transitions, 13918 flow, removed 191 selfloop flow, removed 9 redundant places. [2024-06-27 21:28:15,412 INFO L231 Difference]: Finished difference. Result has 451 places, 718 transitions, 12608 flow [2024-06-27 21:28:15,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12389, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12608, PETRI_PLACES=451, PETRI_TRANSITIONS=718} [2024-06-27 21:28:15,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 21:28:15,413 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 718 transitions, 12608 flow [2024-06-27 21:28:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:15,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:15,414 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, 1] [2024-06-27 21:28:15,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:28:15,414 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:15,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:15,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1504029223, now seen corresponding path program 21 times [2024-06-27 21:28:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817353408] [2024-06-27 21:28:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:17,951 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 21:28:17,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817353408] [2024-06-27 21:28:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817353408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:17,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484607046] [2024-06-27 21:28:17,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:17,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:17,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:17,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:17,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 718 transitions, 12608 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:17,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:17,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:20,656 INFO L124 PetriNetUnfolderBase]: 3660/5652 cut-off events. [2024-06-27 21:28:20,656 INFO L125 PetriNetUnfolderBase]: For 738171/738175 co-relation queries the response was YES. [2024-06-27 21:28:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63378 conditions, 5652 events. 3660/5652 cut-off events. For 738171/738175 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32330 event pairs, 614 based on Foata normal form. 5/5656 useless extension candidates. Maximal degree in co-relation 63164. Up to 5313 conditions per place. [2024-06-27 21:28:20,741 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 636 selfloop transitions, 100 changer transitions 0/740 dead transitions. [2024-06-27 21:28:20,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 740 transitions, 14451 flow [2024-06-27 21:28:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-27 21:28:20,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 21:28:20,742 INFO L175 Difference]: Start difference. First operand has 451 places, 718 transitions, 12608 flow. Second operand 9 states and 135 transitions. [2024-06-27 21:28:20,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 740 transitions, 14451 flow [2024-06-27 21:28:23,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 740 transitions, 14164 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:23,363 INFO L231 Difference]: Finished difference. Result has 455 places, 725 transitions, 12891 flow [2024-06-27 21:28:23,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12321, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12891, PETRI_PLACES=455, PETRI_TRANSITIONS=725} [2024-06-27 21:28:23,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 21:28:23,363 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 725 transitions, 12891 flow [2024-06-27 21:28:23,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:23,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:23,363 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, 1] [2024-06-27 21:28:23,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:28:23,364 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:23,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash -839628867, now seen corresponding path program 3 times [2024-06-27 21:28:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:23,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18197070] [2024-06-27 21:28:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:25,748 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 21:28:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18197070] [2024-06-27 21:28:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18197070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:25,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:25,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:25,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615504859] [2024-06-27 21:28:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:25,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:25,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:25,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:25,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:25,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 725 transitions, 12891 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:25,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:25,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:25,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:28,593 INFO L124 PetriNetUnfolderBase]: 3642/5626 cut-off events. [2024-06-27 21:28:28,593 INFO L125 PetriNetUnfolderBase]: For 727070/727074 co-relation queries the response was YES. [2024-06-27 21:28:28,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62782 conditions, 5626 events. 3642/5626 cut-off events. For 727070/727074 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32134 event pairs, 468 based on Foata normal form. 8/5633 useless extension candidates. Maximal degree in co-relation 62566. Up to 5002 conditions per place. [2024-06-27 21:28:28,692 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 673 selfloop transitions, 75 changer transitions 0/752 dead transitions. [2024-06-27 21:28:28,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 752 transitions, 14721 flow [2024-06-27 21:28:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:28:28,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 21:28:28,693 INFO L175 Difference]: Start difference. First operand has 455 places, 725 transitions, 12891 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:28:28,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 752 transitions, 14721 flow [2024-06-27 21:28:31,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 752 transitions, 14182 flow, removed 189 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:31,228 INFO L231 Difference]: Finished difference. Result has 457 places, 725 transitions, 12508 flow [2024-06-27 21:28:31,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12352, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12508, PETRI_PLACES=457, PETRI_TRANSITIONS=725} [2024-06-27 21:28:31,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-27 21:28:31,228 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 725 transitions, 12508 flow [2024-06-27 21:28:31,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:31,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:31,228 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, 1] [2024-06-27 21:28:31,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:28:31,229 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:31,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash -751061216, now seen corresponding path program 8 times [2024-06-27 21:28:31,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:31,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77163280] [2024-06-27 21:28:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:33,820 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 21:28:33,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:33,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77163280] [2024-06-27 21:28:33,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77163280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:33,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:33,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:33,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79638662] [2024-06-27 21:28:33,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:33,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:33,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 725 transitions, 12508 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:33,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:33,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:33,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:36,179 INFO L124 PetriNetUnfolderBase]: 3639/5626 cut-off events. [2024-06-27 21:28:36,180 INFO L125 PetriNetUnfolderBase]: For 699885/699889 co-relation queries the response was YES. [2024-06-27 21:28:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62375 conditions, 5626 events. 3639/5626 cut-off events. For 699885/699889 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32301 event pairs, 615 based on Foata normal form. 1/5626 useless extension candidates. Maximal degree in co-relation 62158. Up to 5184 conditions per place. [2024-06-27 21:28:36,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 627 selfloop transitions, 113 changer transitions 0/744 dead transitions. [2024-06-27 21:28:36,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 744 transitions, 14034 flow [2024-06-27 21:28:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:28:36,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 21:28:36,283 INFO L175 Difference]: Start difference. First operand has 457 places, 725 transitions, 12508 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:28:36,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 744 transitions, 14034 flow [2024-06-27 21:28:39,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 744 transitions, 13760 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:39,120 INFO L231 Difference]: Finished difference. Result has 456 places, 725 transitions, 12488 flow [2024-06-27 21:28:39,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12234, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12488, PETRI_PLACES=456, PETRI_TRANSITIONS=725} [2024-06-27 21:28:39,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 21:28:39,120 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 725 transitions, 12488 flow [2024-06-27 21:28:39,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:39,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:39,120 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, 1] [2024-06-27 21:28:39,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:28:39,121 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:39,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash -750971006, now seen corresponding path program 9 times [2024-06-27 21:28:39,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:39,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827459173] [2024-06-27 21:28:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:42,361 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 21:28:42,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:42,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827459173] [2024-06-27 21:28:42,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827459173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:42,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:42,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410779400] [2024-06-27 21:28:42,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:42,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:42,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:42,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 725 transitions, 12488 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:42,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:42,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:42,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:44,613 INFO L124 PetriNetUnfolderBase]: 3636/5622 cut-off events. [2024-06-27 21:28:44,613 INFO L125 PetriNetUnfolderBase]: For 693580/693584 co-relation queries the response was YES. [2024-06-27 21:28:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61857 conditions, 5622 events. 3636/5622 cut-off events. For 693580/693584 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 32241 event pairs, 605 based on Foata normal form. 1/5622 useless extension candidates. Maximal degree in co-relation 61641. Up to 5191 conditions per place. [2024-06-27 21:28:44,710 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 623 selfloop transitions, 116 changer transitions 0/743 dead transitions. [2024-06-27 21:28:44,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 743 transitions, 14172 flow [2024-06-27 21:28:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:28:44,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-27 21:28:44,711 INFO L175 Difference]: Start difference. First operand has 456 places, 725 transitions, 12488 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:28:44,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 743 transitions, 14172 flow [2024-06-27 21:28:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 743 transitions, 13834 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:47,648 INFO L231 Difference]: Finished difference. Result has 456 places, 728 transitions, 12589 flow [2024-06-27 21:28:47,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12150, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12589, PETRI_PLACES=456, PETRI_TRANSITIONS=728} [2024-06-27 21:28:47,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 21:28:47,649 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 728 transitions, 12589 flow [2024-06-27 21:28:47,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:28:47,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:47,649 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, 1] [2024-06-27 21:28:47,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:28:47,649 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:47,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash -143863877, now seen corresponding path program 1 times [2024-06-27 21:28:47,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:47,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940878793] [2024-06-27 21:28:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:47,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:52,849 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 21:28:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940878793] [2024-06-27 21:28:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940878793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:28:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571150630] [2024-06-27 21:28:52,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:28:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:28:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:28:52,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:28:52,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 728 transitions, 12589 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:28:52,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:52,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:28:52,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:55,374 INFO L124 PetriNetUnfolderBase]: 3839/5967 cut-off events. [2024-06-27 21:28:55,374 INFO L125 PetriNetUnfolderBase]: For 927895/927899 co-relation queries the response was YES. [2024-06-27 21:28:55,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67430 conditions, 5967 events. 3839/5967 cut-off events. For 927895/927899 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34546 event pairs, 578 based on Foata normal form. 42/6008 useless extension candidates. Maximal degree in co-relation 67214. Up to 5091 conditions per place. [2024-06-27 21:28:55,482 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 625 selfloop transitions, 138 changer transitions 0/767 dead transitions. [2024-06-27 21:28:55,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 767 transitions, 14951 flow [2024-06-27 21:28:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:28:55,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:28:55,484 INFO L175 Difference]: Start difference. First operand has 456 places, 728 transitions, 12589 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:28:55,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 767 transitions, 14951 flow [2024-06-27 21:28:58,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 767 transitions, 14602 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:58,759 INFO L231 Difference]: Finished difference. Result has 462 places, 732 transitions, 12692 flow [2024-06-27 21:28:58,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12242, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12692, PETRI_PLACES=462, PETRI_TRANSITIONS=732} [2024-06-27 21:28:58,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-27 21:28:58,760 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 732 transitions, 12692 flow [2024-06-27 21:28:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:28:58,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:58,760 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, 1] [2024-06-27 21:28:58,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:28:58,760 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:58,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 316663965, now seen corresponding path program 2 times [2024-06-27 21:28:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:58,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090901303] [2024-06-27 21:28:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:02,274 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 21:29:02,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:02,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090901303] [2024-06-27 21:29:02,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090901303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:02,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:02,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:02,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806844532] [2024-06-27 21:29:02,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:02,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:02,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:02,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:02,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 732 transitions, 12692 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:29:02,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:02,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:02,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:04,840 INFO L124 PetriNetUnfolderBase]: 3859/5995 cut-off events. [2024-06-27 21:29:04,840 INFO L125 PetriNetUnfolderBase]: For 815600/815600 co-relation queries the response was YES. [2024-06-27 21:29:04,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68039 conditions, 5995 events. 3859/5995 cut-off events. For 815600/815600 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 34811 event pairs, 780 based on Foata normal form. 6/6000 useless extension candidates. Maximal degree in co-relation 67821. Up to 5799 conditions per place. [2024-06-27 21:29:04,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 723 selfloop transitions, 24 changer transitions 0/751 dead transitions. [2024-06-27 21:29:04,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 751 transitions, 14315 flow [2024-06-27 21:29:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 21:29:04,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33875338753387535 [2024-06-27 21:29:04,943 INFO L175 Difference]: Start difference. First operand has 462 places, 732 transitions, 12692 flow. Second operand 9 states and 125 transitions. [2024-06-27 21:29:04,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 751 transitions, 14315 flow [2024-06-27 21:29:08,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 751 transitions, 14117 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:08,019 INFO L231 Difference]: Finished difference. Result has 465 places, 733 transitions, 12574 flow [2024-06-27 21:29:08,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12494, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12574, PETRI_PLACES=465, PETRI_TRANSITIONS=733} [2024-06-27 21:29:08,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-27 21:29:08,020 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 733 transitions, 12574 flow [2024-06-27 21:29:08,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:29:08,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:08,020 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, 1] [2024-06-27 21:29:08,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:29:08,020 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:08,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1366782173, now seen corresponding path program 3 times [2024-06-27 21:29:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:08,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662087651] [2024-06-27 21:29:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:10,790 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 21:29:10,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:10,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662087651] [2024-06-27 21:29:10,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662087651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:10,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:10,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:10,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866254488] [2024-06-27 21:29:10,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:10,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:10,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:10,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:10,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:10,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 733 transitions, 12574 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 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 21:29:10,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:10,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:10,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:13,221 INFO L124 PetriNetUnfolderBase]: 3846/5980 cut-off events. [2024-06-27 21:29:13,221 INFO L125 PetriNetUnfolderBase]: For 797233/797233 co-relation queries the response was YES. [2024-06-27 21:29:13,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67192 conditions, 5980 events. 3846/5980 cut-off events. For 797233/797233 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 34768 event pairs, 768 based on Foata normal form. 6/5985 useless extension candidates. Maximal degree in co-relation 66972. Up to 5783 conditions per place. [2024-06-27 21:29:13,332 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 728 selfloop transitions, 19 changer transitions 0/751 dead transitions. [2024-06-27 21:29:13,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 751 transitions, 14164 flow [2024-06-27 21:29:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-27 21:29:13,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33604336043360433 [2024-06-27 21:29:13,334 INFO L175 Difference]: Start difference. First operand has 465 places, 733 transitions, 12574 flow. Second operand 9 states and 124 transitions. [2024-06-27 21:29:13,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 751 transitions, 14164 flow [2024-06-27 21:29:16,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 751 transitions, 14109 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:16,632 INFO L231 Difference]: Finished difference. Result has 469 places, 733 transitions, 12561 flow [2024-06-27 21:29:16,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12519, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12561, PETRI_PLACES=469, PETRI_TRANSITIONS=733} [2024-06-27 21:29:16,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-27 21:29:16,633 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 733 transitions, 12561 flow [2024-06-27 21:29:16,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 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 21:29:16,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:16,633 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, 1, 1] [2024-06-27 21:29:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:29:16,633 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:16,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash 805787032, now seen corresponding path program 1 times [2024-06-27 21:29:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445986662] [2024-06-27 21:29:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:20,263 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 21:29:20,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445986662] [2024-06-27 21:29:20,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445986662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:20,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:20,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:20,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830455569] [2024-06-27 21:29:20,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:20,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:20,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:20,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 733 transitions, 12561 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:29:20,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:20,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:20,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:22,583 INFO L124 PetriNetUnfolderBase]: 3854/5988 cut-off events. [2024-06-27 21:29:22,583 INFO L125 PetriNetUnfolderBase]: For 791818/791822 co-relation queries the response was YES. [2024-06-27 21:29:22,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67376 conditions, 5988 events. 3854/5988 cut-off events. For 791818/791822 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 34560 event pairs, 607 based on Foata normal form. 2/5989 useless extension candidates. Maximal degree in co-relation 67155. Up to 5651 conditions per place. [2024-06-27 21:29:22,692 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 729 selfloop transitions, 25 changer transitions 0/758 dead transitions. [2024-06-27 21:29:22,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 758 transitions, 14237 flow [2024-06-27 21:29:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:22,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:29:22,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-27 21:29:22,693 INFO L175 Difference]: Start difference. First operand has 469 places, 733 transitions, 12561 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:29:22,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 758 transitions, 14237 flow [2024-06-27 21:29:26,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 758 transitions, 14132 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:26,405 INFO L231 Difference]: Finished difference. Result has 468 places, 736 transitions, 12637 flow [2024-06-27 21:29:26,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12456, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12637, PETRI_PLACES=468, PETRI_TRANSITIONS=736} [2024-06-27 21:29:26,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-27 21:29:26,406 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 736 transitions, 12637 flow [2024-06-27 21:29:26,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:29:26,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:26,406 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, 1, 1] [2024-06-27 21:29:26,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:29:26,406 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:26,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash -721741870, now seen corresponding path program 2 times [2024-06-27 21:29:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:26,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318398624] [2024-06-27 21:29:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:26,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:29,627 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 21:29:29,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318398624] [2024-06-27 21:29:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318398624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:29,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:29,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:29,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198651185] [2024-06-27 21:29:29,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:29,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:29,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:29,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:29,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:29,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 736 transitions, 12637 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:29:29,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:29,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:29,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:32,691 INFO L124 PetriNetUnfolderBase]: 3862/6000 cut-off events. [2024-06-27 21:29:32,691 INFO L125 PetriNetUnfolderBase]: For 804227/804231 co-relation queries the response was YES. [2024-06-27 21:29:32,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67435 conditions, 6000 events. 3862/6000 cut-off events. For 804227/804231 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34687 event pairs, 590 based on Foata normal form. 2/6001 useless extension candidates. Maximal degree in co-relation 67214. Up to 5642 conditions per place. [2024-06-27 21:29:32,785 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 706 selfloop transitions, 46 changer transitions 0/756 dead transitions. [2024-06-27 21:29:32,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 756 transitions, 14234 flow [2024-06-27 21:29:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 21:29:32,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-27 21:29:32,787 INFO L175 Difference]: Start difference. First operand has 468 places, 736 transitions, 12637 flow. Second operand 8 states and 118 transitions. [2024-06-27 21:29:32,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 756 transitions, 14234 flow [2024-06-27 21:29:36,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 756 transitions, 14075 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:36,409 INFO L231 Difference]: Finished difference. Result has 472 places, 738 transitions, 12631 flow [2024-06-27 21:29:36,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12478, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12631, PETRI_PLACES=472, PETRI_TRANSITIONS=738} [2024-06-27 21:29:36,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-27 21:29:36,409 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 738 transitions, 12631 flow [2024-06-27 21:29:36,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:29:36,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:36,410 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, 1, 1] [2024-06-27 21:29:36,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:29:36,410 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:36,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2019035090, now seen corresponding path program 3 times [2024-06-27 21:29:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614729776] [2024-06-27 21:29:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:36,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:39,660 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 21:29:39,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:39,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614729776] [2024-06-27 21:29:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614729776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:39,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349499024] [2024-06-27 21:29:39,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:39,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:39,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 738 transitions, 12631 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:29:39,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:39,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:39,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:42,085 INFO L124 PetriNetUnfolderBase]: 3890/6050 cut-off events. [2024-06-27 21:29:42,085 INFO L125 PetriNetUnfolderBase]: For 807466/807470 co-relation queries the response was YES. [2024-06-27 21:29:42,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67573 conditions, 6050 events. 3890/6050 cut-off events. For 807466/807470 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35240 event pairs, 730 based on Foata normal form. 2/6051 useless extension candidates. Maximal degree in co-relation 67351. Up to 5680 conditions per place. [2024-06-27 21:29:42,194 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 717 selfloop transitions, 42 changer transitions 0/763 dead transitions. [2024-06-27 21:29:42,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 763 transitions, 14305 flow [2024-06-27 21:29:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:29:42,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-27 21:29:42,195 INFO L175 Difference]: Start difference. First operand has 472 places, 738 transitions, 12631 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:29:42,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 763 transitions, 14305 flow [2024-06-27 21:29:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 763 transitions, 14175 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:45,773 INFO L231 Difference]: Finished difference. Result has 475 places, 742 transitions, 12713 flow [2024-06-27 21:29:45,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12501, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12713, PETRI_PLACES=475, PETRI_TRANSITIONS=742} [2024-06-27 21:29:45,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-27 21:29:45,774 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 742 transitions, 12713 flow [2024-06-27 21:29:45,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:29:45,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:45,774 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, 1, 1] [2024-06-27 21:29:45,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:29:45,774 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:45,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:45,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2092312068, now seen corresponding path program 4 times [2024-06-27 21:29:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:45,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444480998] [2024-06-27 21:29:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:45,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:49,538 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 21:29:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444480998] [2024-06-27 21:29:49,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444480998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:49,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:29:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790350691] [2024-06-27 21:29:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:49,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:29:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:29:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:29:49,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:49,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 742 transitions, 12713 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:29:49,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:49,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:49,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:52,248 INFO L124 PetriNetUnfolderBase]: 3926/6098 cut-off events. [2024-06-27 21:29:52,248 INFO L125 PetriNetUnfolderBase]: For 822152/822154 co-relation queries the response was YES. [2024-06-27 21:29:52,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68389 conditions, 6098 events. 3926/6098 cut-off events. For 822152/822154 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35564 event pairs, 712 based on Foata normal form. 2/6099 useless extension candidates. Maximal degree in co-relation 68165. Up to 5832 conditions per place. [2024-06-27 21:29:52,360 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 732 selfloop transitions, 51 changer transitions 0/787 dead transitions. [2024-06-27 21:29:52,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 787 transitions, 14716 flow [2024-06-27 21:29:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:29:52,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-27 21:29:52,361 INFO L175 Difference]: Start difference. First operand has 475 places, 742 transitions, 12713 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:29:52,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 787 transitions, 14716 flow [2024-06-27 21:29:55,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 787 transitions, 14537 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:55,674 INFO L231 Difference]: Finished difference. Result has 481 places, 756 transitions, 13036 flow [2024-06-27 21:29:55,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12542, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13036, PETRI_PLACES=481, PETRI_TRANSITIONS=756} [2024-06-27 21:29:55,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 21:29:55,675 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 756 transitions, 13036 flow [2024-06-27 21:29:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:29:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:55,675 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, 1, 1] [2024-06-27 21:29:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:29:55,675 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:55,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash -800898384, now seen corresponding path program 5 times [2024-06-27 21:29:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895514769] [2024-06-27 21:29:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:58,892 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 21:29:58,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:58,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895514769] [2024-06-27 21:29:58,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895514769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:58,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:58,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:58,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129593271] [2024-06-27 21:29:58,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:58,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:58,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:29:58,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 756 transitions, 13036 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:29:58,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:58,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:29:58,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:02,141 INFO L124 PetriNetUnfolderBase]: 3934/6110 cut-off events. [2024-06-27 21:30:02,141 INFO L125 PetriNetUnfolderBase]: For 833562/833566 co-relation queries the response was YES. [2024-06-27 21:30:02,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68412 conditions, 6110 events. 3934/6110 cut-off events. For 833562/833566 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35586 event pairs, 681 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 68185. Up to 5368 conditions per place. [2024-06-27 21:30:02,244 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 600 selfloop transitions, 179 changer transitions 0/783 dead transitions. [2024-06-27 21:30:02,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 783 transitions, 14994 flow [2024-06-27 21:30:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:30:02,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 21:30:02,246 INFO L175 Difference]: Start difference. First operand has 481 places, 756 transitions, 13036 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:30:02,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 783 transitions, 14994 flow [2024-06-27 21:30:05,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 783 transitions, 14737 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:05,619 INFO L231 Difference]: Finished difference. Result has 484 places, 762 transitions, 13418 flow [2024-06-27 21:30:05,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12779, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13418, PETRI_PLACES=484, PETRI_TRANSITIONS=762} [2024-06-27 21:30:05,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 21:30:05,620 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 762 transitions, 13418 flow [2024-06-27 21:30:05,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:30:05,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:05,620 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, 1, 1] [2024-06-27 21:30:05,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:30:05,620 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:05,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash 493865870, now seen corresponding path program 6 times [2024-06-27 21:30:05,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:05,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627962107] [2024-06-27 21:30:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:09,604 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 21:30:09,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627962107] [2024-06-27 21:30:09,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627962107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:09,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:09,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:30:09,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991134351] [2024-06-27 21:30:09,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:09,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:30:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:30:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:30:09,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:09,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 762 transitions, 13418 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:30:09,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:09,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:13,277 INFO L124 PetriNetUnfolderBase]: 4074/6318 cut-off events. [2024-06-27 21:30:13,277 INFO L125 PetriNetUnfolderBase]: For 961444/961448 co-relation queries the response was YES. [2024-06-27 21:30:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74391 conditions, 6318 events. 4074/6318 cut-off events. For 961444/961448 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36919 event pairs, 689 based on Foata normal form. 2/6319 useless extension candidates. Maximal degree in co-relation 74162. Up to 5379 conditions per place. [2024-06-27 21:30:13,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 644 selfloop transitions, 151 changer transitions 0/799 dead transitions. [2024-06-27 21:30:13,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 799 transitions, 15820 flow [2024-06-27 21:30:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 21:30:13,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-27 21:30:13,383 INFO L175 Difference]: Start difference. First operand has 484 places, 762 transitions, 13418 flow. Second operand 9 states and 137 transitions. [2024-06-27 21:30:13,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 799 transitions, 15820 flow [2024-06-27 21:30:17,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 799 transitions, 15570 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:17,561 INFO L231 Difference]: Finished difference. Result has 489 places, 772 transitions, 13924 flow [2024-06-27 21:30:17,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13179, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13924, PETRI_PLACES=489, PETRI_TRANSITIONS=772} [2024-06-27 21:30:17,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-27 21:30:17,562 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 772 transitions, 13924 flow [2024-06-27 21:30:17,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 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 21:30:17,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:17,562 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, 1, 1] [2024-06-27 21:30:17,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:30:17,563 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:17,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1855687518, now seen corresponding path program 7 times [2024-06-27 21:30:17,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:17,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426692471] [2024-06-27 21:30:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:20,723 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 21:30:20,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426692471] [2024-06-27 21:30:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426692471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:20,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:20,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312207270] [2024-06-27 21:30:20,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:20,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:20,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 772 transitions, 13924 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:30:20,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:20,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:20,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:23,361 INFO L124 PetriNetUnfolderBase]: 4110/6388 cut-off events. [2024-06-27 21:30:23,361 INFO L125 PetriNetUnfolderBase]: For 1029893/1029901 co-relation queries the response was YES. [2024-06-27 21:30:23,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76480 conditions, 6388 events. 4110/6388 cut-off events. For 1029893/1029901 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 37603 event pairs, 761 based on Foata normal form. 18/6405 useless extension candidates. Maximal degree in co-relation 76249. Up to 5999 conditions per place. [2024-06-27 21:30:23,481 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 712 selfloop transitions, 78 changer transitions 0/794 dead transitions. [2024-06-27 21:30:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 794 transitions, 15790 flow [2024-06-27 21:30:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:30:23,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 21:30:23,482 INFO L175 Difference]: Start difference. First operand has 489 places, 772 transitions, 13924 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:30:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 794 transitions, 15790 flow [2024-06-27 21:30:27,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 794 transitions, 15563 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:27,943 INFO L231 Difference]: Finished difference. Result has 491 places, 774 transitions, 13972 flow [2024-06-27 21:30:27,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13697, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13972, PETRI_PLACES=491, PETRI_TRANSITIONS=774} [2024-06-27 21:30:27,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 21:30:27,944 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 774 transitions, 13972 flow [2024-06-27 21:30:27,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:30:27,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:27,944 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, 1, 1] [2024-06-27 21:30:27,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:30:27,944 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:27,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1595142194, now seen corresponding path program 1 times [2024-06-27 21:30:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:27,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160534800] [2024-06-27 21:30:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:27,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:32,964 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 21:30:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:32,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160534800] [2024-06-27 21:30:32,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160534800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:32,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:32,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:30:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49353822] [2024-06-27 21:30:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:30:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:30:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:30:32,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:32,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 774 transitions, 13972 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:30:32,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:32,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:32,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:35,687 INFO L124 PetriNetUnfolderBase]: 4146/6430 cut-off events. [2024-06-27 21:30:35,687 INFO L125 PetriNetUnfolderBase]: For 1052228/1052232 co-relation queries the response was YES. [2024-06-27 21:30:35,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77271 conditions, 6430 events. 4146/6430 cut-off events. For 1052228/1052232 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 37621 event pairs, 679 based on Foata normal form. 10/6439 useless extension candidates. Maximal degree in co-relation 77040. Up to 5499 conditions per place. [2024-06-27 21:30:35,806 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 720 selfloop transitions, 84 changer transitions 0/808 dead transitions. [2024-06-27 21:30:35,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 808 transitions, 16034 flow [2024-06-27 21:30:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:30:35,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-27 21:30:35,807 INFO L175 Difference]: Start difference. First operand has 491 places, 774 transitions, 13972 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:30:35,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 808 transitions, 16034 flow [2024-06-27 21:30:40,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 808 transitions, 15841 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:40,227 INFO L231 Difference]: Finished difference. Result has 493 places, 776 transitions, 14075 flow [2024-06-27 21:30:40,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13779, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14075, PETRI_PLACES=493, PETRI_TRANSITIONS=776} [2024-06-27 21:30:40,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 21:30:40,227 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 776 transitions, 14075 flow [2024-06-27 21:30:40,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:30:40,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:40,227 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, 1, 1] [2024-06-27 21:30:40,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:30:40,228 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:40,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2023862100, now seen corresponding path program 2 times [2024-06-27 21:30:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:40,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101719056] [2024-06-27 21:30:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:43,702 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 21:30:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101719056] [2024-06-27 21:30:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101719056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:43,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:43,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:43,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057140497] [2024-06-27 21:30:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:43,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:43,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:43,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:43,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:43,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 776 transitions, 14075 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:30:43,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:43,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:46,639 INFO L124 PetriNetUnfolderBase]: 4174/6480 cut-off events. [2024-06-27 21:30:46,639 INFO L125 PetriNetUnfolderBase]: For 1062149/1062153 co-relation queries the response was YES. [2024-06-27 21:30:46,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78223 conditions, 6480 events. 4174/6480 cut-off events. For 1062149/1062153 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38234 event pairs, 793 based on Foata normal form. 8/6487 useless extension candidates. Maximal degree in co-relation 77991. Up to 6014 conditions per place. [2024-06-27 21:30:46,767 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 690 selfloop transitions, 108 changer transitions 0/802 dead transitions. [2024-06-27 21:30:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 802 transitions, 15911 flow [2024-06-27 21:30:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:30:46,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 21:30:46,768 INFO L175 Difference]: Start difference. First operand has 493 places, 776 transitions, 14075 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:30:46,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 802 transitions, 15911 flow [2024-06-27 21:30:51,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 802 transitions, 15735 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:51,691 INFO L231 Difference]: Finished difference. Result has 497 places, 777 transitions, 14176 flow [2024-06-27 21:30:51,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13899, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14176, PETRI_PLACES=497, PETRI_TRANSITIONS=777} [2024-06-27 21:30:51,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-27 21:30:51,691 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 777 transitions, 14176 flow [2024-06-27 21:30:51,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:30:51,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:51,691 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, 1, 1] [2024-06-27 21:30:51,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:30:51,691 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:51,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2023862224, now seen corresponding path program 1 times [2024-06-27 21:30:51,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:51,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391305480] [2024-06-27 21:30:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:51,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:55,325 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 21:30:55,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391305480] [2024-06-27 21:30:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391305480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:30:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218064527] [2024-06-27 21:30:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:30:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:30:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:30:55,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:30:55,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 777 transitions, 14176 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:30:55,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:55,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:30:55,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:58,436 INFO L124 PetriNetUnfolderBase]: 4184/6494 cut-off events. [2024-06-27 21:30:58,436 INFO L125 PetriNetUnfolderBase]: For 1036643/1036647 co-relation queries the response was YES. [2024-06-27 21:30:58,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78519 conditions, 6494 events. 4184/6494 cut-off events. For 1036643/1036647 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 38305 event pairs, 790 based on Foata normal form. 2/6495 useless extension candidates. Maximal degree in co-relation 78287. Up to 6157 conditions per place. [2024-06-27 21:30:58,565 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 740 selfloop transitions, 57 changer transitions 0/801 dead transitions. [2024-06-27 21:30:58,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 801 transitions, 16044 flow [2024-06-27 21:30:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:30:58,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-27 21:30:58,567 INFO L175 Difference]: Start difference. First operand has 497 places, 777 transitions, 14176 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:30:58,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 801 transitions, 16044 flow [2024-06-27 21:31:03,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 801 transitions, 15842 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:03,357 INFO L231 Difference]: Finished difference. Result has 499 places, 780 transitions, 14316 flow [2024-06-27 21:31:03,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13974, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14316, PETRI_PLACES=499, PETRI_TRANSITIONS=780} [2024-06-27 21:31:03,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-27 21:31:03,358 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 780 transitions, 14316 flow [2024-06-27 21:31:03,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:31:03,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:03,358 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, 1, 1] [2024-06-27 21:31:03,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:31:03,358 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:03,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1701907306, now seen corresponding path program 3 times [2024-06-27 21:31:03,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:03,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229726042] [2024-06-27 21:31:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:07,318 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 21:31:07,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:07,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229726042] [2024-06-27 21:31:07,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229726042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:07,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:07,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:31:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118783107] [2024-06-27 21:31:07,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:07,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:31:07,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:31:07,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:31:07,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:07,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 780 transitions, 14316 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:31:07,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:07,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:07,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:10,285 INFO L124 PetriNetUnfolderBase]: 4220/6550 cut-off events. [2024-06-27 21:31:10,285 INFO L125 PetriNetUnfolderBase]: For 1097448/1097452 co-relation queries the response was YES. [2024-06-27 21:31:10,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79786 conditions, 6550 events. 4220/6550 cut-off events. For 1097448/1097452 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38782 event pairs, 804 based on Foata normal form. 10/6559 useless extension candidates. Maximal degree in co-relation 79554. Up to 6140 conditions per place. [2024-06-27 21:31:10,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 728 selfloop transitions, 81 changer transitions 0/813 dead transitions. [2024-06-27 21:31:10,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 813 transitions, 16448 flow [2024-06-27 21:31:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:31:10,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-27 21:31:10,411 INFO L175 Difference]: Start difference. First operand has 499 places, 780 transitions, 14316 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:31:10,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 813 transitions, 16448 flow [2024-06-27 21:31:15,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 813 transitions, 16145 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:15,368 INFO L231 Difference]: Finished difference. Result has 502 places, 789 transitions, 14440 flow [2024-06-27 21:31:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14013, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14440, PETRI_PLACES=502, PETRI_TRANSITIONS=789} [2024-06-27 21:31:15,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 21:31:15,369 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 789 transitions, 14440 flow [2024-06-27 21:31:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:31:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:15,369 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, 1, 1] [2024-06-27 21:31:15,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:31:15,369 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:15,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash -11964278, now seen corresponding path program 2 times [2024-06-27 21:31:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:15,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521502013] [2024-06-27 21:31:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:15,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:19,746 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 21:31:19,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:19,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521502013] [2024-06-27 21:31:19,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521502013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:19,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:19,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:31:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664384224] [2024-06-27 21:31:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:31:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:31:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:31:19,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:19,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 789 transitions, 14440 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:31:19,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:19,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:22,954 INFO L124 PetriNetUnfolderBase]: 4240/6582 cut-off events. [2024-06-27 21:31:22,954 INFO L125 PetriNetUnfolderBase]: For 1060053/1060057 co-relation queries the response was YES. [2024-06-27 21:31:23,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80183 conditions, 6582 events. 4240/6582 cut-off events. For 1060053/1060057 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 38985 event pairs, 740 based on Foata normal form. 2/6583 useless extension candidates. Maximal degree in co-relation 79950. Up to 6154 conditions per place. [2024-06-27 21:31:23,071 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 713 selfloop transitions, 97 changer transitions 0/814 dead transitions. [2024-06-27 21:31:23,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 814 transitions, 16389 flow [2024-06-27 21:31:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-27 21:31:23,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36341463414634145 [2024-06-27 21:31:23,072 INFO L175 Difference]: Start difference. First operand has 502 places, 789 transitions, 14440 flow. Second operand 10 states and 149 transitions. [2024-06-27 21:31:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 814 transitions, 16389 flow [2024-06-27 21:31:27,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 814 transitions, 16263 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:27,836 INFO L231 Difference]: Finished difference. Result has 507 places, 795 transitions, 14821 flow [2024-06-27 21:31:27,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14314, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14821, PETRI_PLACES=507, PETRI_TRANSITIONS=795} [2024-06-27 21:31:27,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-27 21:31:27,837 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 795 transitions, 14821 flow [2024-06-27 21:31:27,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 21:31:27,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:27,838 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, 1, 1] [2024-06-27 21:31:27,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:31:27,838 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:27,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash 540100840, now seen corresponding path program 4 times [2024-06-27 21:31:27,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:27,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363821211] [2024-06-27 21:31:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:31,063 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 21:31:31,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363821211] [2024-06-27 21:31:31,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363821211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:31,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:31,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:31:31,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231271706] [2024-06-27 21:31:31,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:31:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:31:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:31:31,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:31,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 795 transitions, 14821 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:31:31,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:31,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:34,335 INFO L124 PetriNetUnfolderBase]: 4339/6733 cut-off events. [2024-06-27 21:31:34,335 INFO L125 PetriNetUnfolderBase]: For 1193666/1193670 co-relation queries the response was YES. [2024-06-27 21:31:34,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84925 conditions, 6733 events. 4339/6733 cut-off events. For 1193666/1193670 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 39819 event pairs, 747 based on Foata normal form. 6/6738 useless extension candidates. Maximal degree in co-relation 84690. Up to 5270 conditions per place. [2024-06-27 21:31:34,450 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 675 selfloop transitions, 161 changer transitions 0/840 dead transitions. [2024-06-27 21:31:34,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 840 transitions, 17501 flow [2024-06-27 21:31:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:31:34,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-27 21:31:34,451 INFO L175 Difference]: Start difference. First operand has 507 places, 795 transitions, 14821 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:31:34,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 840 transitions, 17501 flow [2024-06-27 21:31:39,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 840 transitions, 17141 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:39,027 INFO L231 Difference]: Finished difference. Result has 510 places, 799 transitions, 15032 flow [2024-06-27 21:31:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14461, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15032, PETRI_PLACES=510, PETRI_TRANSITIONS=799} [2024-06-27 21:31:39,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-27 21:31:39,028 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 799 transitions, 15032 flow [2024-06-27 21:31:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:31:39,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:39,028 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, 1, 1] [2024-06-27 21:31:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:31:39,028 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:39,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 540110140, now seen corresponding path program 5 times [2024-06-27 21:31:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:39,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530753923] [2024-06-27 21:31:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:42,449 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 21:31:42,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:42,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530753923] [2024-06-27 21:31:42,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530753923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:42,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:42,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:31:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40318999] [2024-06-27 21:31:42,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:42,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:31:42,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:31:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:31:42,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:42,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 799 transitions, 15032 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:31:42,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:42,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:42,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:45,413 INFO L124 PetriNetUnfolderBase]: 4405/6839 cut-off events. [2024-06-27 21:31:45,413 INFO L125 PetriNetUnfolderBase]: For 1262256/1262260 co-relation queries the response was YES. [2024-06-27 21:31:45,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87802 conditions, 6839 events. 4405/6839 cut-off events. For 1262256/1262260 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40590 event pairs, 744 based on Foata normal form. 6/6844 useless extension candidates. Maximal degree in co-relation 87565. Up to 5306 conditions per place. [2024-06-27 21:31:45,861 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 670 selfloop transitions, 165 changer transitions 0/839 dead transitions. [2024-06-27 21:31:45,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 839 transitions, 17689 flow [2024-06-27 21:31:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:31:45,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-27 21:31:45,862 INFO L175 Difference]: Start difference. First operand has 510 places, 799 transitions, 15032 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:31:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 839 transitions, 17689 flow [2024-06-27 21:31:50,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 839 transitions, 17458 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:50,714 INFO L231 Difference]: Finished difference. Result has 515 places, 801 transitions, 15240 flow [2024-06-27 21:31:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14815, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15240, PETRI_PLACES=515, PETRI_TRANSITIONS=801} [2024-06-27 21:31:50,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-27 21:31:50,715 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 801 transitions, 15240 flow [2024-06-27 21:31:50,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:31:50,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:50,715 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, 1, 1] [2024-06-27 21:31:50,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:31:50,715 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:50,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1767306549, now seen corresponding path program 1 times [2024-06-27 21:31:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427161361] [2024-06-27 21:31:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:53,816 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 21:31:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:53,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427161361] [2024-06-27 21:31:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427161361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:53,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:31:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127652307] [2024-06-27 21:31:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:31:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:31:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:31:53,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:31:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 801 transitions, 15240 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:31:53,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:53,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:31:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:57,425 INFO L124 PetriNetUnfolderBase]: 4955/7729 cut-off events. [2024-06-27 21:31:57,425 INFO L125 PetriNetUnfolderBase]: For 1828284/1828292 co-relation queries the response was YES. [2024-06-27 21:31:57,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105696 conditions, 7729 events. 4955/7729 cut-off events. For 1828284/1828292 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 47183 event pairs, 951 based on Foata normal form. 48/7776 useless extension candidates. Maximal degree in co-relation 105457. Up to 6424 conditions per place. [2024-06-27 21:31:57,944 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 789 selfloop transitions, 58 changer transitions 10/861 dead transitions. [2024-06-27 21:31:57,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 861 transitions, 18605 flow [2024-06-27 21:31:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:31:57,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 21:31:57,946 INFO L175 Difference]: Start difference. First operand has 515 places, 801 transitions, 15240 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:31:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 861 transitions, 18605 flow [2024-06-27 21:32:04,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 861 transitions, 18326 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:04,382 INFO L231 Difference]: Finished difference. Result has 522 places, 809 transitions, 15506 flow [2024-06-27 21:32:04,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14965, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15506, PETRI_PLACES=522, PETRI_TRANSITIONS=809} [2024-06-27 21:32:04,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-27 21:32:04,383 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 809 transitions, 15506 flow [2024-06-27 21:32:04,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:32:04,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:04,383 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, 1, 1] [2024-06-27 21:32:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:32:04,383 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:04,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash 433070348, now seen corresponding path program 6 times [2024-06-27 21:32:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:04,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699778730] [2024-06-27 21:32:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:08,107 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 21:32:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699778730] [2024-06-27 21:32:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699778730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:08,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:08,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:32:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843292546] [2024-06-27 21:32:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:32:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:32:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:32:08,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-27 21:32:08,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 809 transitions, 15506 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:32:08,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:08,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-27 21:32:08,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:11,326 INFO L124 PetriNetUnfolderBase]: 4761/7401 cut-off events. [2024-06-27 21:32:11,326 INFO L125 PetriNetUnfolderBase]: For 1688739/1688743 co-relation queries the response was YES. [2024-06-27 21:32:11,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101924 conditions, 7401 events. 4761/7401 cut-off events. For 1688739/1688743 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44868 event pairs, 1008 based on Foata normal form. 16/7416 useless extension candidates. Maximal degree in co-relation 101681. Up to 6906 conditions per place. [2024-06-27 21:32:11,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 734 selfloop transitions, 101 changer transitions 0/839 dead transitions. [2024-06-27 21:32:11,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 839 transitions, 17442 flow [2024-06-27 21:32:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:32:11,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 21:32:11,484 INFO L175 Difference]: Start difference. First operand has 522 places, 809 transitions, 15506 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:32:11,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 839 transitions, 17442 flow [2024-06-27 21:32:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 839 transitions, 17326 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:16,980 INFO L231 Difference]: Finished difference. Result has 527 places, 810 transitions, 15651 flow [2024-06-27 21:32:16,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15390, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15651, PETRI_PLACES=527, PETRI_TRANSITIONS=810} [2024-06-27 21:32:16,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-27 21:32:16,981 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 810 transitions, 15651 flow [2024-06-27 21:32:16,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 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 21:32:16,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:16,981 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, 1, 1] [2024-06-27 21:32:16,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:32:16,981 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:16,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:16,982 INFO L85 PathProgramCache]: Analyzing trace with hash 533585260, now seen corresponding path program 7 times [2024-06-27 21:32:16,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:16,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926264345] [2024-06-27 21:32:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:16,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15