./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.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/mutex-meet-nonrel/safe018_power.oepc.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.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_power.oepc.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 [2024-06-28 04:15:02,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:15:02,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:15:02,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:15:02,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:15:02,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:15:02,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:15:02,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:15:02,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:15:02,769 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:15:02,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:15:02,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:15:02,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:15:02,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:15:02,772 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:15:02,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:15:02,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:15:02,773 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:15:02,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:15:02,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:15:02,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:15:02,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:15:02,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:15:02,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:15:02,774 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:15:02,774 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:15:02,775 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:15:02,775 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:15:02,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:15:02,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:15:02,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:15:02,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:15:02,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:15:02,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:15:02,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:15:02,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:15:02,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:15:02,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:15:02,778 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:15:02,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:15:02,778 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:15:02,779 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:15:02,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:15:02,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:15:03,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:15:03,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:15:03,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:15:03,042 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:15:03,043 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:15:03,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_power.oepc.yml/witness.yml [2024-06-28 04:15:03,281 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:15:03,281 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:15:03,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-28 04:15:04,300 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:15:04,532 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:15:04,533 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-28 04:15:04,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/736117094/984209bb9796409b9b80fd539ebb2aa2/FLAGd6274153a [2024-06-28 04:15:04,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/736117094/984209bb9796409b9b80fd539ebb2aa2 [2024-06-28 04:15:04,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:15:04,558 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:15:04,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:15:04,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:15:04,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:15:04,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:15:03" (1/2) ... [2024-06-28 04:15:04,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48428723 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:15:04, skipping insertion in model container [2024-06-28 04:15:04,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:15:03" (1/2) ... [2024-06-28 04:15:04,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49fb1c51 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:15:04, skipping insertion in model container [2024-06-28 04:15:04,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:15:04" (2/2) ... [2024-06-28 04:15:04,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48428723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:04, skipping insertion in model container [2024-06-28 04:15:04,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:15:04" (2/2) ... [2024-06-28 04:15:04,566 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:15:04,682 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:15:04,683 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:15:04,683 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:15:04,683 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:15:04,683 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:15:04,684 INFO L106 edCorrectnessWitness]: ghost_update [L833-L833] multithreaded = 1; [2024-06-28 04:15:04,721 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:15:05,023 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:15:05,030 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:15:05,154 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:15:05,182 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:15:05,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05 WrapperNode [2024-06-28 04:15:05,183 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:15:05,184 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:15:05,184 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:15:05,184 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:15:05,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,225 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-28 04:15:05,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:15:05,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:15:05,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:15:05,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:15:05,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,254 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,267 INFO L175 MemorySlicer]: Split 41 memory accesses to 2 slices as follows [2, 39]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-28 04:15:05,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:15:05,286 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:15:05,286 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:15:05,287 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:15:05,287 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (1/1) ... [2024-06-28 04:15:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:15:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:15:05,326 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) [2024-06-28 04:15:05,357 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 [2024-06-28 04:15:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:15:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:15:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:15:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:15:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:15:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:15:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:15:05,372 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:15:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:15:05,373 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:15:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:15:05,373 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:15:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:15:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:15:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:15:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:15:05,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:15:05,375 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 04:15:05,520 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:15:05,522 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:15:05,944 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:15:05,944 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:15:06,267 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:15:06,267 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:15:06,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:15:06 BoogieIcfgContainer [2024-06-28 04:15:06,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:15:06,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:15:06,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:15:06,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:15:06,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:15:03" (1/4) ... [2024-06-28 04:15:06,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6371fe93 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:15:06, skipping insertion in model container [2024-06-28 04:15:06,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:15:04" (2/4) ... [2024-06-28 04:15:06,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6371fe93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:15:06, skipping insertion in model container [2024-06-28 04:15:06,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:15:05" (3/4) ... [2024-06-28 04:15:06,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6371fe93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:15:06, skipping insertion in model container [2024-06-28 04:15:06,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:15:06" (4/4) ... [2024-06-28 04:15:06,276 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.oepc.i [2024-06-28 04:15:06,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:15:06,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:15:06,290 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:15:06,336 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:15:06,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 04:15:06,385 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 04:15:06,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:15:06,387 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 51 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. [2024-06-28 04:15:06,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 04:15:06,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 04:15:06,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:15:06,400 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;@2b878088, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:15:06,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:15:06,404 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:15:06,404 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:15:06,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:15:06,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:06,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:15:06,405 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)] === [2024-06-28 04:15:06,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 720258345, now seen corresponding path program 1 times [2024-06-28 04:15:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:06,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283572446] [2024-06-28 04:15:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:08,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:08,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283572446] [2024-06-28 04:15:08,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283572446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:08,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:08,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:15:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798602666] [2024-06-28 04:15:08,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:08,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:15:08,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:15:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:15:08,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 04:15:08,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:08,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:08,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 04:15:08,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:08,805 INFO L124 PetriNetUnfolderBase]: 602/990 cut-off events. [2024-06-28 04:15:08,805 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 04:15:08,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 990 events. 602/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4658 event pairs, 367 based on Foata normal form. 1/968 useless extension candidates. Maximal degree in co-relation 1965. Up to 930 conditions per place. [2024-06-28 04:15:08,816 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-28 04:15:08,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 175 flow [2024-06-28 04:15:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:15:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:15:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 04:15:08,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-28 04:15:08,828 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-28 04:15:08,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 175 flow [2024-06-28 04:15:08,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:15:08,833 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 04:15:08,834 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} [2024-06-28 04:15:08,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 04:15:08,837 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 04:15:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:08,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:08,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:08,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:15:08,838 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)] === [2024-06-28 04:15:08,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash 679406862, now seen corresponding path program 1 times [2024-06-28 04:15:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:08,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775347839] [2024-06-28 04:15:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:10,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:10,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775347839] [2024-06-28 04:15:10,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775347839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:10,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:10,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:15:10,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241502474] [2024-06-28 04:15:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:10,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:15:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:15:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:15:10,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 04:15:10,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:10,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:10,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 04:15:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:11,256 INFO L124 PetriNetUnfolderBase]: 596/982 cut-off events. [2024-06-28 04:15:11,257 INFO L125 PetriNetUnfolderBase]: For 207/215 co-relation queries the response was YES. [2024-06-28 04:15:11,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 982 events. 596/982 cut-off events. For 207/215 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4604 event pairs, 277 based on Foata normal form. 6/987 useless extension candidates. Maximal degree in co-relation 2264. Up to 902 conditions per place. [2024-06-28 04:15:11,263 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-28 04:15:11,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 250 flow [2024-06-28 04:15:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:15:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:15:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-28 04:15:11,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-28 04:15:11,268 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 95 transitions. [2024-06-28 04:15:11,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 250 flow [2024-06-28 04:15:11,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:15:11,270 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-28 04:15:11,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 04:15:11,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-28 04:15:11,273 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-28 04:15:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:11,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:11,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:11,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:15:11,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:11,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1969864464, now seen corresponding path program 1 times [2024-06-28 04:15:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:11,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851675992] [2024-06-28 04:15:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:11,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:13,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851675992] [2024-06-28 04:15:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851675992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:13,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:13,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:15:13,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225262529] [2024-06-28 04:15:13,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:13,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:15:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:15:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:15:14,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 04:15:14,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-28 04:15:14,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:14,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 04:15:14,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:14,806 INFO L124 PetriNetUnfolderBase]: 754/1210 cut-off events. [2024-06-28 04:15:14,806 INFO L125 PetriNetUnfolderBase]: For 709/725 co-relation queries the response was YES. [2024-06-28 04:15:14,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1210 events. 754/1210 cut-off events. For 709/725 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5591 event pairs, 215 based on Foata normal form. 12/1221 useless extension candidates. Maximal degree in co-relation 3130. Up to 1079 conditions per place. [2024-06-28 04:15:14,812 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-28 04:15:14,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 374 flow [2024-06-28 04:15:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:15:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:15:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-28 04:15:14,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-28 04:15:14,814 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 131 transitions. [2024-06-28 04:15:14,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 374 flow [2024-06-28 04:15:14,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 354 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 04:15:14,816 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-28 04:15:14,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 04:15:14,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-28 04:15:14,817 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-28 04:15:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-28 04:15:14,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:14,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:14,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:15:14,818 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)] === [2024-06-28 04:15:14,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1219030179, now seen corresponding path program 1 times [2024-06-28 04:15:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748972856] [2024-06-28 04:15:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:16,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:16,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748972856] [2024-06-28 04:15:16,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748972856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:16,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:16,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:15:16,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83831055] [2024-06-28 04:15:16,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:16,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:15:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:15:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:15:16,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:16,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 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) [2024-06-28 04:15:16,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:16,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:16,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:16,892 INFO L124 PetriNetUnfolderBase]: 868/1376 cut-off events. [2024-06-28 04:15:16,892 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2024-06-28 04:15:16,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3929 conditions, 1376 events. 868/1376 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6337 event pairs, 337 based on Foata normal form. 2/1378 useless extension candidates. Maximal degree in co-relation 3912. Up to 1311 conditions per place. [2024-06-28 04:15:16,899 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-28 04:15:16,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 352 flow [2024-06-28 04:15:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:15:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:15:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 04:15:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-28 04:15:16,901 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 88 transitions. [2024-06-28 04:15:16,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 352 flow [2024-06-28 04:15:16,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 321 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:15:16,904 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 211 flow [2024-06-28 04:15:16,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-28 04:15:16,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-28 04:15:16,905 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 211 flow [2024-06-28 04:15:16,905 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) [2024-06-28 04:15:16,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:16,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:16,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:15:16,905 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)] === [2024-06-28 04:15:16,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:16,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1043735326, now seen corresponding path program 1 times [2024-06-28 04:15:16,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:16,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35133216] [2024-06-28 04:15:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:19,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35133216] [2024-06-28 04:15:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35133216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:19,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:15:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427140331] [2024-06-28 04:15:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:15:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:15:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:15:19,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:19,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 211 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) [2024-06-28 04:15:19,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:19,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:19,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:20,425 INFO L124 PetriNetUnfolderBase]: 881/1391 cut-off events. [2024-06-28 04:15:20,425 INFO L125 PetriNetUnfolderBase]: For 1985/1985 co-relation queries the response was YES. [2024-06-28 04:15:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1391 events. 881/1391 cut-off events. For 1985/1985 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6416 event pairs, 320 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 4281. Up to 1287 conditions per place. [2024-06-28 04:15:20,433 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-28 04:15:20,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 473 flow [2024-06-28 04:15:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:15:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:15:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 04:15:20,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-28 04:15:20,438 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 211 flow. Second operand 6 states and 112 transitions. [2024-06-28 04:15:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 473 flow [2024-06-28 04:15:20,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 469 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 04:15:20,446 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 296 flow [2024-06-28 04:15:20,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-28 04:15:20,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 04:15:20,448 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 296 flow [2024-06-28 04:15:20,448 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) [2024-06-28 04:15:20,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:20,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:15:20,449 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)] === [2024-06-28 04:15:20,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash -7550716, now seen corresponding path program 2 times [2024-06-28 04:15:20,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:20,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185730081] [2024-06-28 04:15:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:22,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185730081] [2024-06-28 04:15:22,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185730081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:22,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:22,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:15:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013431285] [2024-06-28 04:15:22,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:22,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:15:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:15:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:15:22,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:22,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 296 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) [2024-06-28 04:15:22,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:22,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:22,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:23,596 INFO L124 PetriNetUnfolderBase]: 876/1390 cut-off events. [2024-06-28 04:15:23,597 INFO L125 PetriNetUnfolderBase]: For 3068/3074 co-relation queries the response was YES. [2024-06-28 04:15:23,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 1390 events. 876/1390 cut-off events. For 3068/3074 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6441 event pairs, 324 based on Foata normal form. 8/1398 useless extension candidates. Maximal degree in co-relation 4714. Up to 1282 conditions per place. [2024-06-28 04:15:23,605 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-28 04:15:23,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 491 flow [2024-06-28 04:15:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:15:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:15:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 04:15:23,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 04:15:23,607 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 296 flow. Second operand 6 states and 106 transitions. [2024-06-28 04:15:23,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 491 flow [2024-06-28 04:15:23,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 463 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 04:15:23,612 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 315 flow [2024-06-28 04:15:23,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-28 04:15:23,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-28 04:15:23,614 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 315 flow [2024-06-28 04:15:23,615 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) [2024-06-28 04:15:23,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:23,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:23,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:15:23,615 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)] === [2024-06-28 04:15:23,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash -40610790, now seen corresponding path program 1 times [2024-06-28 04:15:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:23,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352233250] [2024-06-28 04:15:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:25,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352233250] [2024-06-28 04:15:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352233250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:15:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074461165] [2024-06-28 04:15:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:15:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:15:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:15:25,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:25,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 315 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) [2024-06-28 04:15:25,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:25,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:25,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:25,885 INFO L124 PetriNetUnfolderBase]: 868/1376 cut-off events. [2024-06-28 04:15:25,885 INFO L125 PetriNetUnfolderBase]: For 3542/3542 co-relation queries the response was YES. [2024-06-28 04:15:25,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 1376 events. 868/1376 cut-off events. For 3542/3542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6309 event pairs, 296 based on Foata normal form. 4/1380 useless extension candidates. Maximal degree in co-relation 4762. Up to 1289 conditions per place. [2024-06-28 04:15:25,894 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-28 04:15:25,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 521 flow [2024-06-28 04:15:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:15:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:15:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 04:15:25,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 04:15:25,895 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 315 flow. Second operand 6 states and 104 transitions. [2024-06-28 04:15:25,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 521 flow [2024-06-28 04:15:25,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 497 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 04:15:25,900 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 332 flow [2024-06-28 04:15:25,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-28 04:15:25,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-28 04:15:25,901 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 332 flow [2024-06-28 04:15:25,901 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) [2024-06-28 04:15:25,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:25,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:15:25,901 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)] === [2024-06-28 04:15:25,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2003824865, now seen corresponding path program 1 times [2024-06-28 04:15:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467345693] [2024-06-28 04:15:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:28,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:28,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467345693] [2024-06-28 04:15:28,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467345693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:28,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:28,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:28,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443138111] [2024-06-28 04:15:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:28,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:28,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:28,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 332 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) [2024-06-28 04:15:28,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:28,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:28,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:29,846 INFO L124 PetriNetUnfolderBase]: 886/1414 cut-off events. [2024-06-28 04:15:29,846 INFO L125 PetriNetUnfolderBase]: For 4613/4613 co-relation queries the response was YES. [2024-06-28 04:15:29,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5098 conditions, 1414 events. 886/1414 cut-off events. For 4613/4613 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6671 event pairs, 272 based on Foata normal form. 3/1417 useless extension candidates. Maximal degree in co-relation 5071. Up to 1283 conditions per place. [2024-06-28 04:15:29,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 72 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-28 04:15:29,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 622 flow [2024-06-28 04:15:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 04:15:29,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-28 04:15:29,859 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 332 flow. Second operand 7 states and 132 transitions. [2024-06-28 04:15:29,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 622 flow [2024-06-28 04:15:29,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 599 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 04:15:29,864 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 388 flow [2024-06-28 04:15:29,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-28 04:15:29,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-28 04:15:29,865 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 388 flow [2024-06-28 04:15:29,866 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) [2024-06-28 04:15:29,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:29,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:15:29,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:29,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2003944835, now seen corresponding path program 2 times [2024-06-28 04:15:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:29,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413552483] [2024-06-28 04:15:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:32,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:32,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413552483] [2024-06-28 04:15:32,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413552483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:32,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:32,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:32,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194030393] [2024-06-28 04:15:32,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:32,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:32,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:32,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:32,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 388 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) [2024-06-28 04:15:32,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:32,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:32,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:33,620 INFO L124 PetriNetUnfolderBase]: 899/1431 cut-off events. [2024-06-28 04:15:33,621 INFO L125 PetriNetUnfolderBase]: For 5649/5649 co-relation queries the response was YES. [2024-06-28 04:15:33,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5590 conditions, 1431 events. 899/1431 cut-off events. For 5649/5649 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6700 event pairs, 294 based on Foata normal form. 2/1432 useless extension candidates. Maximal degree in co-relation 5562. Up to 1261 conditions per place. [2024-06-28 04:15:33,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-28 04:15:33,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 763 flow [2024-06-28 04:15:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:15:33,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-28 04:15:33,631 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 388 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:15:33,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 763 flow [2024-06-28 04:15:33,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 703 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:33,635 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 494 flow [2024-06-28 04:15:33,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-28 04:15:33,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-28 04:15:33,637 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 494 flow [2024-06-28 04:15:33,638 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) [2024-06-28 04:15:33,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:33,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:15:33,638 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)] === [2024-06-28 04:15:33,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -234070623, now seen corresponding path program 3 times [2024-06-28 04:15:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771328819] [2024-06-28 04:15:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:36,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:36,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771328819] [2024-06-28 04:15:36,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771328819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:36,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:36,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:36,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792331549] [2024-06-28 04:15:36,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:36,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:36,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:36,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 494 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) [2024-06-28 04:15:36,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:36,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:36,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:37,217 INFO L124 PetriNetUnfolderBase]: 894/1425 cut-off events. [2024-06-28 04:15:37,217 INFO L125 PetriNetUnfolderBase]: For 7398/7398 co-relation queries the response was YES. [2024-06-28 04:15:37,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5966 conditions, 1425 events. 894/1425 cut-off events. For 7398/7398 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6634 event pairs, 307 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 5935. Up to 1256 conditions per place. [2024-06-28 04:15:37,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-28 04:15:37,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 749 flow [2024-06-28 04:15:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:15:37,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-28 04:15:37,239 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 494 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:15:37,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 749 flow [2024-06-28 04:15:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 711 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 04:15:37,248 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 527 flow [2024-06-28 04:15:37,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-28 04:15:37,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-28 04:15:37,249 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 527 flow [2024-06-28 04:15:37,249 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) [2024-06-28 04:15:37,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:15:37,250 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)] === [2024-06-28 04:15:37,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1199820739, now seen corresponding path program 1 times [2024-06-28 04:15:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:37,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700090660] [2024-06-28 04:15:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700090660] [2024-06-28 04:15:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700090660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730238766] [2024-06-28 04:15:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:39,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:39,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 527 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) [2024-06-28 04:15:39,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:39,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:39,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:40,344 INFO L124 PetriNetUnfolderBase]: 960/1534 cut-off events. [2024-06-28 04:15:40,345 INFO L125 PetriNetUnfolderBase]: For 8909/8909 co-relation queries the response was YES. [2024-06-28 04:15:40,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6656 conditions, 1534 events. 960/1534 cut-off events. For 8909/8909 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7240 event pairs, 294 based on Foata normal form. 4/1537 useless extension candidates. Maximal degree in co-relation 6623. Up to 1362 conditions per place. [2024-06-28 04:15:40,353 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 88 selfloop transitions, 31 changer transitions 0/124 dead transitions. [2024-06-28 04:15:40,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 997 flow [2024-06-28 04:15:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:15:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:15:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:15:40,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 04:15:40,355 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 527 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:15:40,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 997 flow [2024-06-28 04:15:40,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 936 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 04:15:40,364 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 716 flow [2024-06-28 04:15:40,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-28 04:15:40,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-28 04:15:40,365 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 716 flow [2024-06-28 04:15:40,365 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) [2024-06-28 04:15:40,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:40,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:40,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:15:40,365 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)] === [2024-06-28 04:15:40,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1516736055, now seen corresponding path program 2 times [2024-06-28 04:15:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:40,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017546048] [2024-06-28 04:15:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:40,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017546048] [2024-06-28 04:15:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017546048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199172027] [2024-06-28 04:15:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:42,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:42,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:42,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:42,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 716 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) [2024-06-28 04:15:42,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:42,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:42,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:43,742 INFO L124 PetriNetUnfolderBase]: 980/1566 cut-off events. [2024-06-28 04:15:43,742 INFO L125 PetriNetUnfolderBase]: For 10732/10732 co-relation queries the response was YES. [2024-06-28 04:15:43,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7126 conditions, 1566 events. 980/1566 cut-off events. For 10732/10732 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7395 event pairs, 290 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 7089. Up to 1368 conditions per place. [2024-06-28 04:15:43,756 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-28 04:15:43,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 1052 flow [2024-06-28 04:15:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:15:43,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:15:43,758 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 716 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:15:43,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 1052 flow [2024-06-28 04:15:43,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1008 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 04:15:43,767 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 771 flow [2024-06-28 04:15:43,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=771, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-28 04:15:43,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-28 04:15:43,767 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 771 flow [2024-06-28 04:15:43,768 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) [2024-06-28 04:15:43,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:43,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:15:43,768 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)] === [2024-06-28 04:15:43,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -754520393, now seen corresponding path program 3 times [2024-06-28 04:15:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:43,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277267879] [2024-06-28 04:15:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:46,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277267879] [2024-06-28 04:15:46,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277267879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:46,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:46,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474899018] [2024-06-28 04:15:46,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:46,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:46,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 771 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) [2024-06-28 04:15:46,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:46,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:46,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:46,845 INFO L124 PetriNetUnfolderBase]: 1000/1604 cut-off events. [2024-06-28 04:15:46,846 INFO L125 PetriNetUnfolderBase]: For 12924/12930 co-relation queries the response was YES. [2024-06-28 04:15:46,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7539 conditions, 1604 events. 1000/1604 cut-off events. For 12924/12930 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7667 event pairs, 300 based on Foata normal form. 10/1614 useless extension candidates. Maximal degree in co-relation 7501. Up to 1422 conditions per place. [2024-06-28 04:15:46,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 85 selfloop transitions, 30 changer transitions 0/120 dead transitions. [2024-06-28 04:15:46,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 1103 flow [2024-06-28 04:15:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:15:46,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-28 04:15:46,857 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 771 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:15:46,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 1103 flow [2024-06-28 04:15:46,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 1022 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:46,866 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 786 flow [2024-06-28 04:15:46,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-28 04:15:46,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-28 04:15:46,867 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 786 flow [2024-06-28 04:15:46,867 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) [2024-06-28 04:15:46,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:46,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:46,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:15:46,867 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)] === [2024-06-28 04:15:46,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash -372215143, now seen corresponding path program 4 times [2024-06-28 04:15:46,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:46,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452403739] [2024-06-28 04:15:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:48,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:48,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452403739] [2024-06-28 04:15:48,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452403739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:48,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:48,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:15:48,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651451335] [2024-06-28 04:15:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:48,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:15:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:15:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:15:49,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:49,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 786 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) [2024-06-28 04:15:49,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:49,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:49,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:50,045 INFO L124 PetriNetUnfolderBase]: 992/1592 cut-off events. [2024-06-28 04:15:50,045 INFO L125 PetriNetUnfolderBase]: For 12548/12554 co-relation queries the response was YES. [2024-06-28 04:15:50,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 1592 events. 992/1592 cut-off events. For 12548/12554 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7549 event pairs, 262 based on Foata normal form. 10/1602 useless extension candidates. Maximal degree in co-relation 7357. Up to 1312 conditions per place. [2024-06-28 04:15:50,055 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 81 selfloop transitions, 37 changer transitions 0/123 dead transitions. [2024-06-28 04:15:50,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1124 flow [2024-06-28 04:15:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:15:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:15:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:15:50,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:15:50,066 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 786 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:15:50,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1124 flow [2024-06-28 04:15:50,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 1052 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:50,075 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 823 flow [2024-06-28 04:15:50,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-28 04:15:50,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-28 04:15:50,076 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 823 flow [2024-06-28 04:15:50,076 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) [2024-06-28 04:15:50,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:50,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:15:50,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:50,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1201333248, now seen corresponding path program 1 times [2024-06-28 04:15:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664844101] [2024-06-28 04:15:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:52,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664844101] [2024-06-28 04:15:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664844101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:52,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:15:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113027667] [2024-06-28 04:15:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:15:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:15:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:15:52,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:52,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 823 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:52,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:52,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:52,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:54,076 INFO L124 PetriNetUnfolderBase]: 1210/1952 cut-off events. [2024-06-28 04:15:54,077 INFO L125 PetriNetUnfolderBase]: For 18547/18547 co-relation queries the response was YES. [2024-06-28 04:15:54,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9315 conditions, 1952 events. 1210/1952 cut-off events. For 18547/18547 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9897 event pairs, 245 based on Foata normal form. 18/1970 useless extension candidates. Maximal degree in co-relation 9275. Up to 1438 conditions per place. [2024-06-28 04:15:54,088 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-28 04:15:54,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1393 flow [2024-06-28 04:15:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:15:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:15:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:15:54,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-28 04:15:54,090 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 823 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:15:54,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1393 flow [2024-06-28 04:15:54,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1302 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:54,102 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 879 flow [2024-06-28 04:15:54,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-28 04:15:54,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-28 04:15:54,103 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 879 flow [2024-06-28 04:15:54,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:54,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:54,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:54,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:15:54,104 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)] === [2024-06-28 04:15:54,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:54,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1530398016, now seen corresponding path program 2 times [2024-06-28 04:15:54,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:54,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368531809] [2024-06-28 04:15:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:54,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:15:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:15:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:15:57,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368531809] [2024-06-28 04:15:57,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368531809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:15:57,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:15:57,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:15:57,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986061501] [2024-06-28 04:15:57,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:15:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:15:57,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:15:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:15:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:15:57,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:15:57,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 879 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:57,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:15:57,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:15:57,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:15:58,367 INFO L124 PetriNetUnfolderBase]: 1164/1882 cut-off events. [2024-06-28 04:15:58,368 INFO L125 PetriNetUnfolderBase]: For 18818/18818 co-relation queries the response was YES. [2024-06-28 04:15:58,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 1882 events. 1164/1882 cut-off events. For 18818/18818 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9459 event pairs, 312 based on Foata normal form. 24/1906 useless extension candidates. Maximal degree in co-relation 8889. Up to 1574 conditions per place. [2024-06-28 04:15:58,378 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-28 04:15:58,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 144 transitions, 1306 flow [2024-06-28 04:15:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:15:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:15:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 04:15:58,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 04:15:58,380 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 879 flow. Second operand 8 states and 151 transitions. [2024-06-28 04:15:58,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 144 transitions, 1306 flow [2024-06-28 04:15:58,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1241 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 04:15:58,398 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 899 flow [2024-06-28 04:15:58,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-28 04:15:58,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-28 04:15:58,399 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 899 flow [2024-06-28 04:15:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:15:58,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:15:58,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:15:58,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:15:58,400 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:15:58,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:15:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -226005428, now seen corresponding path program 3 times [2024-06-28 04:15:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:15:58,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513536340] [2024-06-28 04:15:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:15:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:15:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:01,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513536340] [2024-06-28 04:16:01,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513536340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:01,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:01,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157561960] [2024-06-28 04:16:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:01,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:01,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 899 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:01,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:01,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:01,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:02,516 INFO L124 PetriNetUnfolderBase]: 1232/2006 cut-off events. [2024-06-28 04:16:02,517 INFO L125 PetriNetUnfolderBase]: For 20052/20052 co-relation queries the response was YES. [2024-06-28 04:16:02,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 2006 events. 1232/2006 cut-off events. For 20052/20052 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10443 event pairs, 336 based on Foata normal form. 16/2021 useless extension candidates. Maximal degree in co-relation 9424. Up to 1654 conditions per place. [2024-06-28 04:16:02,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 37 changer transitions 0/142 dead transitions. [2024-06-28 04:16:02,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1313 flow [2024-06-28 04:16:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:16:02,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 04:16:02,531 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 899 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:16:02,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1313 flow [2024-06-28 04:16:02,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1263 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:02,549 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 950 flow [2024-06-28 04:16:02,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-06-28 04:16:02,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-28 04:16:02,550 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 950 flow [2024-06-28 04:16:02,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:02,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:02,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:02,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:16:02,551 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:16:02,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1645873636, now seen corresponding path program 1 times [2024-06-28 04:16:02,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:02,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704936906] [2024-06-28 04:16:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:02,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:05,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:05,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704936906] [2024-06-28 04:16:05,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704936906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:05,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:05,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203371845] [2024-06-28 04:16:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:05,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:05,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 950 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:05,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:05,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:05,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:06,356 INFO L124 PetriNetUnfolderBase]: 1280/2102 cut-off events. [2024-06-28 04:16:06,356 INFO L125 PetriNetUnfolderBase]: For 22410/22410 co-relation queries the response was YES. [2024-06-28 04:16:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 2102 events. 1280/2102 cut-off events. For 22410/22410 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11140 event pairs, 332 based on Foata normal form. 12/2113 useless extension candidates. Maximal degree in co-relation 9955. Up to 1482 conditions per place. [2024-06-28 04:16:06,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 40 changer transitions 0/146 dead transitions. [2024-06-28 04:16:06,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 1386 flow [2024-06-28 04:16:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:16:06,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-28 04:16:06,381 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 950 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:16:06,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 1386 flow [2024-06-28 04:16:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1305 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:06,403 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 978 flow [2024-06-28 04:16:06,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-06-28 04:16:06,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-28 04:16:06,404 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 978 flow [2024-06-28 04:16:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:06,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:06,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:06,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:16:06,404 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:16:06,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:06,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1607085828, now seen corresponding path program 4 times [2024-06-28 04:16:06,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:06,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73750593] [2024-06-28 04:16:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:06,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:09,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:09,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73750593] [2024-06-28 04:16:09,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73750593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:09,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:09,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:09,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875019491] [2024-06-28 04:16:09,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:09,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:09,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:09,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:09,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 978 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:09,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:09,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:09,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:10,291 INFO L124 PetriNetUnfolderBase]: 1320/2174 cut-off events. [2024-06-28 04:16:10,291 INFO L125 PetriNetUnfolderBase]: For 25152/25152 co-relation queries the response was YES. [2024-06-28 04:16:10,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 2174 events. 1320/2174 cut-off events. For 25152/25152 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11691 event pairs, 375 based on Foata normal form. 16/2189 useless extension candidates. Maximal degree in co-relation 10292. Up to 1810 conditions per place. [2024-06-28 04:16:10,304 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-28 04:16:10,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 140 transitions, 1382 flow [2024-06-28 04:16:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:16:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 04:16:10,305 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 978 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:16:10,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 140 transitions, 1382 flow [2024-06-28 04:16:10,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 140 transitions, 1304 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 04:16:10,324 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 1003 flow [2024-06-28 04:16:10,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2024-06-28 04:16:10,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-28 04:16:10,325 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 1003 flow [2024-06-28 04:16:10,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:10,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:10,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:10,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:16:10,326 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:16:10,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1110058668, now seen corresponding path program 2 times [2024-06-28 04:16:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:10,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693863774] [2024-06-28 04:16:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:12,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693863774] [2024-06-28 04:16:12,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693863774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:12,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:12,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945575693] [2024-06-28 04:16:12,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:12,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:12,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:12,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:12,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:12,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:12,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:13,976 INFO L124 PetriNetUnfolderBase]: 1368/2270 cut-off events. [2024-06-28 04:16:13,976 INFO L125 PetriNetUnfolderBase]: For 27059/27059 co-relation queries the response was YES. [2024-06-28 04:16:13,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 2270 events. 1368/2270 cut-off events. For 27059/27059 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12385 event pairs, 375 based on Foata normal form. 12/2281 useless extension candidates. Maximal degree in co-relation 10725. Up to 1784 conditions per place. [2024-06-28 04:16:13,988 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 37 changer transitions 0/145 dead transitions. [2024-06-28 04:16:13,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1435 flow [2024-06-28 04:16:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:13,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:16:13,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 04:16:13,990 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 1003 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:16:13,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1435 flow [2024-06-28 04:16:14,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 145 transitions, 1352 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:14,013 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 1026 flow [2024-06-28 04:16:14,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-06-28 04:16:14,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-28 04:16:14,014 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 1026 flow [2024-06-28 04:16:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:16:14,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:16:14,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1346234028, now seen corresponding path program 3 times [2024-06-28 04:16:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035393992] [2024-06-28 04:16:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:16,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035393992] [2024-06-28 04:16:16,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035393992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:16,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:16,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:16:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024725573] [2024-06-28 04:16:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:16,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:16:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:16:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:16:16,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:16,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:16,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:16,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:16,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:17,255 INFO L124 PetriNetUnfolderBase]: 1348/2238 cut-off events. [2024-06-28 04:16:17,256 INFO L125 PetriNetUnfolderBase]: For 26643/26643 co-relation queries the response was YES. [2024-06-28 04:16:17,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10452 conditions, 2238 events. 1348/2238 cut-off events. For 26643/26643 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12101 event pairs, 310 based on Foata normal form. 12/2249 useless extension candidates. Maximal degree in co-relation 10404. Up to 1250 conditions per place. [2024-06-28 04:16:17,267 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-06-28 04:16:17,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 144 transitions, 1388 flow [2024-06-28 04:16:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:16:17,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:16:17,269 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 1026 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:16:17,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 144 transitions, 1388 flow [2024-06-28 04:16:17,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 144 transitions, 1298 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:17,291 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 990 flow [2024-06-28 04:16:17,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2024-06-28 04:16:17,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-28 04:16:17,292 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 990 flow [2024-06-28 04:16:17,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:17,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:17,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:16:17,293 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)] === [2024-06-28 04:16:17,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1804292201, now seen corresponding path program 1 times [2024-06-28 04:16:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586275271] [2024-06-28 04:16:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:18,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:18,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586275271] [2024-06-28 04:16:18,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586275271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:16:18,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951419344] [2024-06-28 04:16:18,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:18,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:16:18,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:16:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:16:18,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:16:18,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 990 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:18,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:18,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:16:18,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:19,741 INFO L124 PetriNetUnfolderBase]: 1215/2070 cut-off events. [2024-06-28 04:16:19,741 INFO L125 PetriNetUnfolderBase]: For 25216/25216 co-relation queries the response was YES. [2024-06-28 04:16:19,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9736 conditions, 2070 events. 1215/2070 cut-off events. For 25216/25216 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11656 event pairs, 356 based on Foata normal form. 2/2047 useless extension candidates. Maximal degree in co-relation 9687. Up to 1893 conditions per place. [2024-06-28 04:16:19,753 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 10 changer transitions 0/120 dead transitions. [2024-06-28 04:16:19,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1242 flow [2024-06-28 04:16:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:16:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:16:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 04:16:19,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-28 04:16:19,755 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 990 flow. Second operand 5 states and 88 transitions. [2024-06-28 04:16:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1242 flow [2024-06-28 04:16:19,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 120 transitions, 1134 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:19,777 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 932 flow [2024-06-28 04:16:19,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=932, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-06-28 04:16:19,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-28 04:16:19,777 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 932 flow [2024-06-28 04:16:19,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:19,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:19,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:16:19,778 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)] === [2024-06-28 04:16:19,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -98666642, now seen corresponding path program 1 times [2024-06-28 04:16:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646310185] [2024-06-28 04:16:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:21,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:21,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646310185] [2024-06-28 04:16:21,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646310185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:21,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:21,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:16:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534089002] [2024-06-28 04:16:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:16:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:16:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:16:21,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:21,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 932 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) [2024-06-28 04:16:21,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:21,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:21,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:22,082 INFO L124 PetriNetUnfolderBase]: 1347/2242 cut-off events. [2024-06-28 04:16:22,083 INFO L125 PetriNetUnfolderBase]: For 25839/25839 co-relation queries the response was YES. [2024-06-28 04:16:22,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10453 conditions, 2242 events. 1347/2242 cut-off events. For 25839/25839 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12322 event pairs, 373 based on Foata normal form. 1/2242 useless extension candidates. Maximal degree in co-relation 10403. Up to 2102 conditions per place. [2024-06-28 04:16:22,098 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2024-06-28 04:16:22,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 1334 flow [2024-06-28 04:16:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 04:16:22,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-28 04:16:22,099 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 932 flow. Second operand 6 states and 101 transitions. [2024-06-28 04:16:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 1334 flow [2024-06-28 04:16:22,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 131 transitions, 1306 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 04:16:22,122 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1012 flow [2024-06-28 04:16:22,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1012, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-06-28 04:16:22,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-28 04:16:22,123 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1012 flow [2024-06-28 04:16:22,123 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) [2024-06-28 04:16:22,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:22,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:16:22,124 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)] === [2024-06-28 04:16:22,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash -53802512, now seen corresponding path program 2 times [2024-06-28 04:16:22,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:22,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735372358] [2024-06-28 04:16:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735372358] [2024-06-28 04:16:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735372358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:23,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:23,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:16:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600064740] [2024-06-28 04:16:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:16:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:16:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:16:23,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:23,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1012 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) [2024-06-28 04:16:23,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:23,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:23,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:24,527 INFO L124 PetriNetUnfolderBase]: 1344/2238 cut-off events. [2024-06-28 04:16:24,527 INFO L125 PetriNetUnfolderBase]: For 28331/28331 co-relation queries the response was YES. [2024-06-28 04:16:24,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 2238 events. 1344/2238 cut-off events. For 28331/28331 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12310 event pairs, 373 based on Foata normal form. 1/2238 useless extension candidates. Maximal degree in co-relation 10671. Up to 2102 conditions per place. [2024-06-28 04:16:24,567 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 13 changer transitions 0/129 dead transitions. [2024-06-28 04:16:24,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 129 transitions, 1300 flow [2024-06-28 04:16:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:16:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:16:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 04:16:24,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-28 04:16:24,571 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1012 flow. Second operand 5 states and 88 transitions. [2024-06-28 04:16:24,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 129 transitions, 1300 flow [2024-06-28 04:16:24,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 129 transitions, 1248 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-28 04:16:24,593 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 996 flow [2024-06-28 04:16:24,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=996, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-28 04:16:24,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-28 04:16:24,593 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 996 flow [2024-06-28 04:16:24,594 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) [2024-06-28 04:16:24,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:24,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:16:24,594 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)] === [2024-06-28 04:16:24,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1848111470, now seen corresponding path program 1 times [2024-06-28 04:16:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418172765] [2024-06-28 04:16:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418172765] [2024-06-28 04:16:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418172765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:26,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969188171] [2024-06-28 04:16:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:27,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:16:27,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 996 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 04:16:27,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:27,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:16:27,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:27,905 INFO L124 PetriNetUnfolderBase]: 1276/2177 cut-off events. [2024-06-28 04:16:27,905 INFO L125 PetriNetUnfolderBase]: For 31652/31652 co-relation queries the response was YES. [2024-06-28 04:16:27,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10580 conditions, 2177 events. 1276/2177 cut-off events. For 31652/31652 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12295 event pairs, 347 based on Foata normal form. 4/2165 useless extension candidates. Maximal degree in co-relation 10527. Up to 1896 conditions per place. [2024-06-28 04:16:27,918 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-28 04:16:27,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 151 transitions, 1459 flow [2024-06-28 04:16:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:16:27,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 04:16:27,920 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 996 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:16:27,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 151 transitions, 1459 flow [2024-06-28 04:16:27,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1433 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:27,948 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 1124 flow [2024-06-28 04:16:27,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1124, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-06-28 04:16:27,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-28 04:16:27,949 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 1124 flow [2024-06-28 04:16:27,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 04:16:27,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:27,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:27,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:16:27,950 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)] === [2024-06-28 04:16:27,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1668061100, now seen corresponding path program 2 times [2024-06-28 04:16:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913658077] [2024-06-28 04:16:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:30,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913658077] [2024-06-28 04:16:30,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913658077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:30,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:30,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:30,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379486371] [2024-06-28 04:16:30,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:30,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:30,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:16:30,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 1124 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 04:16:30,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:30,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:16:30,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:31,200 INFO L124 PetriNetUnfolderBase]: 1264/2161 cut-off events. [2024-06-28 04:16:31,200 INFO L125 PetriNetUnfolderBase]: For 33561/33561 co-relation queries the response was YES. [2024-06-28 04:16:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10837 conditions, 2161 events. 1264/2161 cut-off events. For 33561/33561 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12242 event pairs, 345 based on Foata normal form. 4/2149 useless extension candidates. Maximal degree in co-relation 10783. Up to 1888 conditions per place. [2024-06-28 04:16:31,213 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-28 04:16:31,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 147 transitions, 1444 flow [2024-06-28 04:16:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 04:16:31,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-28 04:16:31,219 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 1124 flow. Second operand 6 states and 110 transitions. [2024-06-28 04:16:31,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 147 transitions, 1444 flow [2024-06-28 04:16:31,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 1400 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 04:16:31,241 INFO L231 Difference]: Finished difference. Result has 121 places, 126 transitions, 1146 flow [2024-06-28 04:16:31,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=121, PETRI_TRANSITIONS=126} [2024-06-28 04:16:31,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-28 04:16:31,242 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 126 transitions, 1146 flow [2024-06-28 04:16:31,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 04:16:31,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:31,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:31,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:16:31,244 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)] === [2024-06-28 04:16:31,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1667675150, now seen corresponding path program 3 times [2024-06-28 04:16:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006529109] [2024-06-28 04:16:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:33,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:33,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006529109] [2024-06-28 04:16:33,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006529109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:33,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:33,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:33,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097124722] [2024-06-28 04:16:33,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:33,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:33,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:33,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:16:33,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 126 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 04:16:33,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:33,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:16:33,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:34,618 INFO L124 PetriNetUnfolderBase]: 1251/2138 cut-off events. [2024-06-28 04:16:34,618 INFO L125 PetriNetUnfolderBase]: For 34929/34930 co-relation queries the response was YES. [2024-06-28 04:16:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10758 conditions, 2138 events. 1251/2138 cut-off events. For 34929/34930 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12102 event pairs, 351 based on Foata normal form. 4/2125 useless extension candidates. Maximal degree in co-relation 10702. Up to 1860 conditions per place. [2024-06-28 04:16:34,630 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 94 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-28 04:16:34,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 1464 flow [2024-06-28 04:16:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 04:16:34,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 04:16:34,631 INFO L175 Difference]: Start difference. First operand has 121 places, 126 transitions, 1146 flow. Second operand 6 states and 104 transitions. [2024-06-28 04:16:34,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 1464 flow [2024-06-28 04:16:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 143 transitions, 1403 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 04:16:34,656 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1187 flow [2024-06-28 04:16:34,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1187, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-06-28 04:16:34,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-28 04:16:34,657 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1187 flow [2024-06-28 04:16:34,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-28 04:16:34,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:34,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:34,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:16:34,658 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)] === [2024-06-28 04:16:34,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1959020598, now seen corresponding path program 1 times [2024-06-28 04:16:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:34,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073665210] [2024-06-28 04:16:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:36,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:36,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073665210] [2024-06-28 04:16:36,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073665210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:36,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:36,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759964645] [2024-06-28 04:16:36,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:36,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:36,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:36,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:36,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1187 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) [2024-06-28 04:16:36,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:36,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:36,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:37,804 INFO L124 PetriNetUnfolderBase]: 1392/2312 cut-off events. [2024-06-28 04:16:37,805 INFO L125 PetriNetUnfolderBase]: For 35379/35379 co-relation queries the response was YES. [2024-06-28 04:16:37,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2312 events. 1392/2312 cut-off events. For 35379/35379 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12721 event pairs, 370 based on Foata normal form. 2/2313 useless extension candidates. Maximal degree in co-relation 11779. Up to 2142 conditions per place. [2024-06-28 04:16:37,820 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 23 changer transitions 0/155 dead transitions. [2024-06-28 04:16:37,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 155 transitions, 1653 flow [2024-06-28 04:16:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:16:37,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-28 04:16:37,821 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1187 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:16:37,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 155 transitions, 1653 flow [2024-06-28 04:16:37,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:37,857 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1229 flow [2024-06-28 04:16:37,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-28 04:16:37,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-28 04:16:37,858 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1229 flow [2024-06-28 04:16:37,858 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) [2024-06-28 04:16:37,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:37,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:16:37,859 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)] === [2024-06-28 04:16:37,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1667876588, now seen corresponding path program 2 times [2024-06-28 04:16:37,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047413709] [2024-06-28 04:16:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:37,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047413709] [2024-06-28 04:16:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047413709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:39,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:39,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:39,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447830021] [2024-06-28 04:16:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:39,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:39,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:39,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1229 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) [2024-06-28 04:16:39,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:39,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:39,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:40,368 INFO L124 PetriNetUnfolderBase]: 1402/2330 cut-off events. [2024-06-28 04:16:40,369 INFO L125 PetriNetUnfolderBase]: For 38241/38241 co-relation queries the response was YES. [2024-06-28 04:16:40,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 2330 events. 1402/2330 cut-off events. For 38241/38241 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12825 event pairs, 369 based on Foata normal form. 2/2331 useless extension candidates. Maximal degree in co-relation 12080. Up to 2161 conditions per place. [2024-06-28 04:16:40,384 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 131 selfloop transitions, 21 changer transitions 0/157 dead transitions. [2024-06-28 04:16:40,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 157 transitions, 1673 flow [2024-06-28 04:16:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 04:16:40,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 04:16:40,386 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1229 flow. Second operand 6 states and 106 transitions. [2024-06-28 04:16:40,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 157 transitions, 1673 flow [2024-06-28 04:16:40,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 157 transitions, 1629 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 04:16:40,419 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1271 flow [2024-06-28 04:16:40,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1271, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2024-06-28 04:16:40,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-28 04:16:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1271 flow [2024-06-28 04:16:40,420 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) [2024-06-28 04:16:40,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:40,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:16:40,421 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)] === [2024-06-28 04:16:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1667669198, now seen corresponding path program 3 times [2024-06-28 04:16:40,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:40,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613329663] [2024-06-28 04:16:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:42,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:42,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613329663] [2024-06-28 04:16:42,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613329663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:42,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:42,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:42,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262941901] [2024-06-28 04:16:42,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:42,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:42,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:42,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:42,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1271 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) [2024-06-28 04:16:42,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:42,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:42,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:43,315 INFO L124 PetriNetUnfolderBase]: 1396/2322 cut-off events. [2024-06-28 04:16:43,315 INFO L125 PetriNetUnfolderBase]: For 39817/39817 co-relation queries the response was YES. [2024-06-28 04:16:43,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12157 conditions, 2322 events. 1396/2322 cut-off events. For 39817/39817 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12758 event pairs, 367 based on Foata normal form. 2/2323 useless extension candidates. Maximal degree in co-relation 12098. Up to 2156 conditions per place. [2024-06-28 04:16:43,371 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 131 selfloop transitions, 22 changer transitions 0/158 dead transitions. [2024-06-28 04:16:43,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1629 flow [2024-06-28 04:16:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:16:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:16:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:16:43,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 04:16:43,375 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1271 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:16:43,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1629 flow [2024-06-28 04:16:43,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 158 transitions, 1553 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:43,411 INFO L231 Difference]: Finished difference. Result has 131 places, 138 transitions, 1245 flow [2024-06-28 04:16:43,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1245, PETRI_PLACES=131, PETRI_TRANSITIONS=138} [2024-06-28 04:16:43,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-28 04:16:43,412 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 138 transitions, 1245 flow [2024-06-28 04:16:43,412 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) [2024-06-28 04:16:43,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:43,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:43,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:16:43,413 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)] === [2024-06-28 04:16:43,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1667661262, now seen corresponding path program 1 times [2024-06-28 04:16:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:43,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995265316] [2024-06-28 04:16:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:43,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:46,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:46,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995265316] [2024-06-28 04:16:46,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995265316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:46,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:46,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:16:46,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907160186] [2024-06-28 04:16:46,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:46,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:16:46,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:16:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:16:46,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:16:46,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 138 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:46,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:46,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:16:46,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:46,865 INFO L124 PetriNetUnfolderBase]: 1252/2152 cut-off events. [2024-06-28 04:16:46,865 INFO L125 PetriNetUnfolderBase]: For 40490/40490 co-relation queries the response was YES. [2024-06-28 04:16:46,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2152 events. 1252/2152 cut-off events. For 40490/40490 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12222 event pairs, 348 based on Foata normal form. 2/2137 useless extension candidates. Maximal degree in co-relation 11281. Up to 1938 conditions per place. [2024-06-28 04:16:46,880 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-06-28 04:16:46,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 153 transitions, 1577 flow [2024-06-28 04:16:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:16:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:16:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 04:16:46,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-28 04:16:46,881 INFO L175 Difference]: Start difference. First operand has 131 places, 138 transitions, 1245 flow. Second operand 6 states and 101 transitions. [2024-06-28 04:16:46,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 153 transitions, 1577 flow [2024-06-28 04:16:46,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 153 transitions, 1513 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:16:46,915 INFO L231 Difference]: Finished difference. Result has 130 places, 140 transitions, 1242 flow [2024-06-28 04:16:46,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1242, PETRI_PLACES=130, PETRI_TRANSITIONS=140} [2024-06-28 04:16:46,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-28 04:16:46,916 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 140 transitions, 1242 flow [2024-06-28 04:16:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:16:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:46,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:16:46,917 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)] === [2024-06-28 04:16:46,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -606500531, now seen corresponding path program 1 times [2024-06-28 04:16:46,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:46,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794046055] [2024-06-28 04:16:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:46,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:49,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:49,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794046055] [2024-06-28 04:16:49,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794046055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:49,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:49,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:49,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964759015] [2024-06-28 04:16:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:49,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:49,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 140 transitions, 1242 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) [2024-06-28 04:16:49,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:49,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:49,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:50,596 INFO L124 PetriNetUnfolderBase]: 1404/2332 cut-off events. [2024-06-28 04:16:50,596 INFO L125 PetriNetUnfolderBase]: For 43858/43858 co-relation queries the response was YES. [2024-06-28 04:16:50,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 2332 events. 1404/2332 cut-off events. For 43858/43858 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12777 event pairs, 366 based on Foata normal form. 1/2332 useless extension candidates. Maximal degree in co-relation 12289. Up to 2088 conditions per place. [2024-06-28 04:16:50,612 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-28 04:16:50,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 1892 flow [2024-06-28 04:16:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:16:50,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-28 04:16:50,614 INFO L175 Difference]: Start difference. First operand has 130 places, 140 transitions, 1242 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:16:50,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 1892 flow [2024-06-28 04:16:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 175 transitions, 1847 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 04:16:50,661 INFO L231 Difference]: Finished difference. Result has 133 places, 149 transitions, 1419 flow [2024-06-28 04:16:50,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1419, PETRI_PLACES=133, PETRI_TRANSITIONS=149} [2024-06-28 04:16:50,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-28 04:16:50,662 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 149 transitions, 1419 flow [2024-06-28 04:16:50,662 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) [2024-06-28 04:16:50,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:50,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:50,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:16:50,663 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)] === [2024-06-28 04:16:50,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -601738931, now seen corresponding path program 2 times [2024-06-28 04:16:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:50,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208549473] [2024-06-28 04:16:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:53,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:53,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208549473] [2024-06-28 04:16:53,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208549473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:53,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:53,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675954033] [2024-06-28 04:16:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:53,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:53,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:53,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:53,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 149 transitions, 1419 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) [2024-06-28 04:16:53,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:53,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:53,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:54,307 INFO L124 PetriNetUnfolderBase]: 1414/2354 cut-off events. [2024-06-28 04:16:54,308 INFO L125 PetriNetUnfolderBase]: For 47678/47678 co-relation queries the response was YES. [2024-06-28 04:16:54,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12832 conditions, 2354 events. 1414/2354 cut-off events. For 47678/47678 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12954 event pairs, 359 based on Foata normal form. 1/2355 useless extension candidates. Maximal degree in co-relation 12770. Up to 2140 conditions per place. [2024-06-28 04:16:54,324 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2024-06-28 04:16:54,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 1905 flow [2024-06-28 04:16:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 04:16:54,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:16:54,326 INFO L175 Difference]: Start difference. First operand has 133 places, 149 transitions, 1419 flow. Second operand 7 states and 119 transitions. [2024-06-28 04:16:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 1905 flow [2024-06-28 04:16:54,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 177 transitions, 1829 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-28 04:16:54,371 INFO L231 Difference]: Finished difference. Result has 138 places, 155 transitions, 1496 flow [2024-06-28 04:16:54,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1496, PETRI_PLACES=138, PETRI_TRANSITIONS=155} [2024-06-28 04:16:54,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-28 04:16:54,372 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 155 transitions, 1496 flow [2024-06-28 04:16:54,372 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) [2024-06-28 04:16:54,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:54,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:54,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:16:54,372 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)] === [2024-06-28 04:16:54,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1862013257, now seen corresponding path program 3 times [2024-06-28 04:16:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040028765] [2024-06-28 04:16:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:16:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:16:56,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:16:56,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040028765] [2024-06-28 04:16:56,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040028765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:16:56,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:16:56,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:16:56,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612342533] [2024-06-28 04:16:56,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:16:56,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:16:56,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:16:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:16:56,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:16:56,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:16:56,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 155 transitions, 1496 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) [2024-06-28 04:16:56,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:16:56,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:16:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:16:57,887 INFO L124 PetriNetUnfolderBase]: 1419/2363 cut-off events. [2024-06-28 04:16:57,887 INFO L125 PetriNetUnfolderBase]: For 50678/50684 co-relation queries the response was YES. [2024-06-28 04:16:57,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12956 conditions, 2363 events. 1419/2363 cut-off events. For 50678/50684 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13014 event pairs, 368 based on Foata normal form. 7/2370 useless extension candidates. Maximal degree in co-relation 12892. Up to 2107 conditions per place. [2024-06-28 04:16:57,904 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-28 04:16:57,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 2080 flow [2024-06-28 04:16:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:16:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:16:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:16:57,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-28 04:16:57,906 INFO L175 Difference]: Start difference. First operand has 138 places, 155 transitions, 1496 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:16:57,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 2080 flow [2024-06-28 04:16:57,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 181 transitions, 2004 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:16:57,955 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1565 flow [2024-06-28 04:16:57,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-28 04:16:57,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-28 04:16:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1565 flow [2024-06-28 04:16:57,956 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) [2024-06-28 04:16:57,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:16:57,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:16:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:16:57,957 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)] === [2024-06-28 04:16:57,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:16:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash 600084813, now seen corresponding path program 4 times [2024-06-28 04:16:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:16:57,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625574528] [2024-06-28 04:16:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:16:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:16:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:00,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:00,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625574528] [2024-06-28 04:17:00,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625574528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:00,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:00,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897677637] [2024-06-28 04:17:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:00,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:00,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:00,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1565 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) [2024-06-28 04:17:00,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:00,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:00,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:01,279 INFO L124 PetriNetUnfolderBase]: 1424/2370 cut-off events. [2024-06-28 04:17:01,279 INFO L125 PetriNetUnfolderBase]: For 53419/53425 co-relation queries the response was YES. [2024-06-28 04:17:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13162 conditions, 2370 events. 1424/2370 cut-off events. For 53419/53425 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13063 event pairs, 368 based on Foata normal form. 7/2377 useless extension candidates. Maximal degree in co-relation 13097. Up to 2113 conditions per place. [2024-06-28 04:17:01,295 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 120 selfloop transitions, 54 changer transitions 0/179 dead transitions. [2024-06-28 04:17:01,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 179 transitions, 2075 flow [2024-06-28 04:17:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 04:17:01,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-28 04:17:01,297 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1565 flow. Second operand 7 states and 116 transitions. [2024-06-28 04:17:01,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 179 transitions, 2075 flow [2024-06-28 04:17:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 179 transitions, 1917 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:01,356 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1567 flow [2024-06-28 04:17:01,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1567, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-28 04:17:01,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-28 04:17:01,357 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1567 flow [2024-06-28 04:17:01,357 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) [2024-06-28 04:17:01,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:01,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:01,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:17:01,358 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)] === [2024-06-28 04:17:01,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2030744363, now seen corresponding path program 5 times [2024-06-28 04:17:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:01,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410325146] [2024-06-28 04:17:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:03,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410325146] [2024-06-28 04:17:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410325146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:03,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316600234] [2024-06-28 04:17:03,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:03,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:03,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:03,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:03,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1567 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) [2024-06-28 04:17:03,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:03,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:03,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:04,705 INFO L124 PetriNetUnfolderBase]: 1421/2364 cut-off events. [2024-06-28 04:17:04,705 INFO L125 PetriNetUnfolderBase]: For 54896/54896 co-relation queries the response was YES. [2024-06-28 04:17:04,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13101 conditions, 2364 events. 1421/2364 cut-off events. For 54896/54896 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13023 event pairs, 359 based on Foata normal form. 1/2365 useless extension candidates. Maximal degree in co-relation 13036. Up to 2076 conditions per place. [2024-06-28 04:17:04,724 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 60 changer transitions 0/196 dead transitions. [2024-06-28 04:17:04,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2119 flow [2024-06-28 04:17:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:17:04,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 04:17:04,726 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1567 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:17:04,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2119 flow [2024-06-28 04:17:04,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 196 transitions, 2003 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 04:17:04,835 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1604 flow [2024-06-28 04:17:04,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1604, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2024-06-28 04:17:04,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-28 04:17:04,836 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1604 flow [2024-06-28 04:17:04,836 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) [2024-06-28 04:17:04,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:04,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:17:04,837 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)] === [2024-06-28 04:17:04,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1215786057, now seen corresponding path program 6 times [2024-06-28 04:17:04,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:04,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036790645] [2024-06-28 04:17:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:07,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:07,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036790645] [2024-06-28 04:17:07,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036790645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:07,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:07,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:07,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790067048] [2024-06-28 04:17:07,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:07,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:07,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:07,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1604 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) [2024-06-28 04:17:07,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:07,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:07,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:07,993 INFO L124 PetriNetUnfolderBase]: 1418/2356 cut-off events. [2024-06-28 04:17:07,994 INFO L125 PetriNetUnfolderBase]: For 58004/58004 co-relation queries the response was YES. [2024-06-28 04:17:08,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13206 conditions, 2356 events. 1418/2356 cut-off events. For 58004/58004 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12945 event pairs, 379 based on Foata normal form. 1/2356 useless extension candidates. Maximal degree in co-relation 13140. Up to 2073 conditions per place. [2024-06-28 04:17:08,010 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 58 changer transitions 0/181 dead transitions. [2024-06-28 04:17:08,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 181 transitions, 2018 flow [2024-06-28 04:17:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:17:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:17:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 04:17:08,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-28 04:17:08,012 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1604 flow. Second operand 6 states and 109 transitions. [2024-06-28 04:17:08,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 181 transitions, 2018 flow [2024-06-28 04:17:08,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 181 transitions, 1827 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-28 04:17:08,073 INFO L231 Difference]: Finished difference. Result has 142 places, 161 transitions, 1542 flow [2024-06-28 04:17:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1542, PETRI_PLACES=142, PETRI_TRANSITIONS=161} [2024-06-28 04:17:08,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-28 04:17:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 161 transitions, 1542 flow [2024-06-28 04:17:08,075 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) [2024-06-28 04:17:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:17:08,075 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)] === [2024-06-28 04:17:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash -329444401, now seen corresponding path program 1 times [2024-06-28 04:17:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446754339] [2024-06-28 04:17:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:09,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:09,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446754339] [2024-06-28 04:17:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446754339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:09,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:09,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818595301] [2024-06-28 04:17:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:09,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:09,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:10,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:10,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 161 transitions, 1542 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) [2024-06-28 04:17:10,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:10,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:10,943 INFO L124 PetriNetUnfolderBase]: 1426/2364 cut-off events. [2024-06-28 04:17:10,944 INFO L125 PetriNetUnfolderBase]: For 55308/55308 co-relation queries the response was YES. [2024-06-28 04:17:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13135 conditions, 2364 events. 1426/2364 cut-off events. For 55308/55308 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12989 event pairs, 331 based on Foata normal form. 2/2365 useless extension candidates. Maximal degree in co-relation 13069. Up to 2175 conditions per place. [2024-06-28 04:17:10,964 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-06-28 04:17:10,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 188 transitions, 2100 flow [2024-06-28 04:17:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:17:10,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-28 04:17:10,966 INFO L175 Difference]: Start difference. First operand has 142 places, 161 transitions, 1542 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:17:10,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 188 transitions, 2100 flow [2024-06-28 04:17:11,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 1973 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:11,014 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1532 flow [2024-06-28 04:17:11,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1532, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-28 04:17:11,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-28 04:17:11,014 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1532 flow [2024-06-28 04:17:11,014 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) [2024-06-28 04:17:11,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:11,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:11,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:17:11,015 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)] === [2024-06-28 04:17:11,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1851529801, now seen corresponding path program 2 times [2024-06-28 04:17:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:11,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047774874] [2024-06-28 04:17:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:12,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:12,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047774874] [2024-06-28 04:17:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047774874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:12,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:12,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:12,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75577097] [2024-06-28 04:17:12,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:12,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:13,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:13,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1532 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) [2024-06-28 04:17:13,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:13,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:13,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:14,102 INFO L124 PetriNetUnfolderBase]: 1434/2383 cut-off events. [2024-06-28 04:17:14,102 INFO L125 PetriNetUnfolderBase]: For 55301/55301 co-relation queries the response was YES. [2024-06-28 04:17:14,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13175 conditions, 2383 events. 1434/2383 cut-off events. For 55301/55301 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13186 event pairs, 369 based on Foata normal form. 2/2384 useless extension candidates. Maximal degree in co-relation 13109. Up to 2222 conditions per place. [2024-06-28 04:17:14,119 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 161 selfloop transitions, 18 changer transitions 0/184 dead transitions. [2024-06-28 04:17:14,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 184 transitions, 1972 flow [2024-06-28 04:17:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:17:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:17:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 04:17:14,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:17:14,120 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1532 flow. Second operand 7 states and 112 transitions. [2024-06-28 04:17:14,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 184 transitions, 1972 flow [2024-06-28 04:17:14,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 184 transitions, 1906 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 04:17:14,175 INFO L231 Difference]: Finished difference. Result has 147 places, 167 transitions, 1547 flow [2024-06-28 04:17:14,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1547, PETRI_PLACES=147, PETRI_TRANSITIONS=167} [2024-06-28 04:17:14,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-28 04:17:14,177 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 167 transitions, 1547 flow [2024-06-28 04:17:14,177 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) [2024-06-28 04:17:14,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:14,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:14,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:17:14,178 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)] === [2024-06-28 04:17:14,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:14,178 INFO L85 PathProgramCache]: Analyzing trace with hash -164570321, now seen corresponding path program 3 times [2024-06-28 04:17:14,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:14,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604335643] [2024-06-28 04:17:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:14,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:16,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604335643] [2024-06-28 04:17:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604335643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:16,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:16,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:17:16,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541540417] [2024-06-28 04:17:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:16,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:17:16,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:17:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:17:16,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:16,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 167 transitions, 1547 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) [2024-06-28 04:17:16,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:16,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:16,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:17,135 INFO L124 PetriNetUnfolderBase]: 1429/2369 cut-off events. [2024-06-28 04:17:17,135 INFO L125 PetriNetUnfolderBase]: For 56942/56942 co-relation queries the response was YES. [2024-06-28 04:17:17,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13107 conditions, 2369 events. 1429/2369 cut-off events. For 56942/56942 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13017 event pairs, 330 based on Foata normal form. 2/2370 useless extension candidates. Maximal degree in co-relation 13039. Up to 2196 conditions per place. [2024-06-28 04:17:17,152 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-28 04:17:17,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 187 transitions, 1967 flow [2024-06-28 04:17:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:17:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:17:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:17:17,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:17:17,154 INFO L175 Difference]: Start difference. First operand has 147 places, 167 transitions, 1547 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:17:17,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 187 transitions, 1967 flow [2024-06-28 04:17:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 187 transitions, 1900 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:17,210 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1522 flow [2024-06-28 04:17:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1522, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-28 04:17:17,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-28 04:17:17,211 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1522 flow [2024-06-28 04:17:17,211 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) [2024-06-28 04:17:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:17,211 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] [2024-06-28 04:17:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:17:17,211 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)] === [2024-06-28 04:17:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1483271634, now seen corresponding path program 1 times [2024-06-28 04:17:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823142841] [2024-06-28 04:17:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:19,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:19,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823142841] [2024-06-28 04:17:19,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823142841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:19,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:19,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957867155] [2024-06-28 04:17:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:19,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:19,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1522 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) [2024-06-28 04:17:19,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:19,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:19,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:20,833 INFO L124 PetriNetUnfolderBase]: 1434/2384 cut-off events. [2024-06-28 04:17:20,834 INFO L125 PetriNetUnfolderBase]: For 58937/58937 co-relation queries the response was YES. [2024-06-28 04:17:20,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13219 conditions, 2384 events. 1434/2384 cut-off events. For 58937/58937 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13172 event pairs, 355 based on Foata normal form. 1/2385 useless extension candidates. Maximal degree in co-relation 13150. Up to 2156 conditions per place. [2024-06-28 04:17:20,852 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 36 changer transitions 0/203 dead transitions. [2024-06-28 04:17:20,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2060 flow [2024-06-28 04:17:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:17:20,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 04:17:20,853 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1522 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:17:20,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2060 flow [2024-06-28 04:17:20,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 203 transitions, 2019 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:20,912 INFO L231 Difference]: Finished difference. Result has 151 places, 170 transitions, 1611 flow [2024-06-28 04:17:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1611, PETRI_PLACES=151, PETRI_TRANSITIONS=170} [2024-06-28 04:17:20,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-28 04:17:20,913 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 170 transitions, 1611 flow [2024-06-28 04:17:20,913 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) [2024-06-28 04:17:20,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:20,913 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] [2024-06-28 04:17:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:17:20,914 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)] === [2024-06-28 04:17:20,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1621915104, now seen corresponding path program 2 times [2024-06-28 04:17:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:20,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898882617] [2024-06-28 04:17:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:23,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898882617] [2024-06-28 04:17:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898882617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:23,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:23,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:23,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933024973] [2024-06-28 04:17:23,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:23,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:23,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 170 transitions, 1611 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) [2024-06-28 04:17:23,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:23,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:23,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:24,964 INFO L124 PetriNetUnfolderBase]: 1447/2400 cut-off events. [2024-06-28 04:17:24,964 INFO L125 PetriNetUnfolderBase]: For 64189/64189 co-relation queries the response was YES. [2024-06-28 04:17:24,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13819 conditions, 2400 events. 1447/2400 cut-off events. For 64189/64189 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13265 event pairs, 362 based on Foata normal form. 1/2400 useless extension candidates. Maximal degree in co-relation 13749. Up to 2037 conditions per place. [2024-06-28 04:17:24,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 75 changer transitions 0/211 dead transitions. [2024-06-28 04:17:24,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2415 flow [2024-06-28 04:17:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:17:24,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:17:24,985 INFO L175 Difference]: Start difference. First operand has 151 places, 170 transitions, 1611 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:17:24,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2415 flow [2024-06-28 04:17:25,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2307 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:25,061 INFO L231 Difference]: Finished difference. Result has 153 places, 179 transitions, 1821 flow [2024-06-28 04:17:25,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1821, PETRI_PLACES=153, PETRI_TRANSITIONS=179} [2024-06-28 04:17:25,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-28 04:17:25,062 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 179 transitions, 1821 flow [2024-06-28 04:17:25,062 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) [2024-06-28 04:17:25,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:25,062 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] [2024-06-28 04:17:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:17:25,063 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)] === [2024-06-28 04:17:25,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash 523743926, now seen corresponding path program 3 times [2024-06-28 04:17:25,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:25,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101196951] [2024-06-28 04:17:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:25,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:27,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:27,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101196951] [2024-06-28 04:17:27,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101196951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:27,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:27,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539444671] [2024-06-28 04:17:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:27,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:27,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:27,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 179 transitions, 1821 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) [2024-06-28 04:17:27,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:27,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:27,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:29,217 INFO L124 PetriNetUnfolderBase]: 1452/2409 cut-off events. [2024-06-28 04:17:29,218 INFO L125 PetriNetUnfolderBase]: For 69393/69393 co-relation queries the response was YES. [2024-06-28 04:17:29,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14322 conditions, 2409 events. 1452/2409 cut-off events. For 69393/69393 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13303 event pairs, 362 based on Foata normal form. 1/2409 useless extension candidates. Maximal degree in co-relation 14251. Up to 2043 conditions per place. [2024-06-28 04:17:29,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 77 changer transitions 0/210 dead transitions. [2024-06-28 04:17:29,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 2517 flow [2024-06-28 04:17:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:17:29,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:17:29,238 INFO L175 Difference]: Start difference. First operand has 153 places, 179 transitions, 1821 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:17:29,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 2517 flow [2024-06-28 04:17:29,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2380 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-28 04:17:29,323 INFO L231 Difference]: Finished difference. Result has 158 places, 182 transitions, 1902 flow [2024-06-28 04:17:29,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1902, PETRI_PLACES=158, PETRI_TRANSITIONS=182} [2024-06-28 04:17:29,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-28 04:17:29,324 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 182 transitions, 1902 flow [2024-06-28 04:17:29,324 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) [2024-06-28 04:17:29,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:29,324 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] [2024-06-28 04:17:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:17:29,325 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)] === [2024-06-28 04:17:29,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1621645993, now seen corresponding path program 1 times [2024-06-28 04:17:29,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:29,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392657198] [2024-06-28 04:17:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392657198] [2024-06-28 04:17:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392657198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:32,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:32,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:32,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751528607] [2024-06-28 04:17:32,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:32,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:32,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 182 transitions, 1902 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) [2024-06-28 04:17:32,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:32,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:32,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:33,303 INFO L124 PetriNetUnfolderBase]: 1494/2467 cut-off events. [2024-06-28 04:17:33,304 INFO L125 PetriNetUnfolderBase]: For 76716/76716 co-relation queries the response was YES. [2024-06-28 04:17:33,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15039 conditions, 2467 events. 1494/2467 cut-off events. For 76716/76716 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13581 event pairs, 365 based on Foata normal form. 2/2468 useless extension candidates. Maximal degree in co-relation 14966. Up to 2164 conditions per place. [2024-06-28 04:17:33,325 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-28 04:17:33,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 227 transitions, 2730 flow [2024-06-28 04:17:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:17:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:17:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:17:33,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:17:33,327 INFO L175 Difference]: Start difference. First operand has 158 places, 182 transitions, 1902 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:17:33,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 227 transitions, 2730 flow [2024-06-28 04:17:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 227 transitions, 2584 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:33,401 INFO L231 Difference]: Finished difference. Result has 164 places, 195 transitions, 2066 flow [2024-06-28 04:17:33,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2066, PETRI_PLACES=164, PETRI_TRANSITIONS=195} [2024-06-28 04:17:33,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-28 04:17:33,402 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 195 transitions, 2066 flow [2024-06-28 04:17:33,402 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) [2024-06-28 04:17:33,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:33,402 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] [2024-06-28 04:17:33,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:17:33,403 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)] === [2024-06-28 04:17:33,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1617926923, now seen corresponding path program 2 times [2024-06-28 04:17:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934748677] [2024-06-28 04:17:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:36,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:36,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934748677] [2024-06-28 04:17:36,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934748677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:36,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654516494] [2024-06-28 04:17:36,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:36,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:36,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 195 transitions, 2066 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) [2024-06-28 04:17:36,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:36,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:37,469 INFO L124 PetriNetUnfolderBase]: 1546/2551 cut-off events. [2024-06-28 04:17:37,469 INFO L125 PetriNetUnfolderBase]: For 87039/87039 co-relation queries the response was YES. [2024-06-28 04:17:37,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16094 conditions, 2551 events. 1546/2551 cut-off events. For 87039/87039 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14171 event pairs, 358 based on Foata normal form. 4/2555 useless extension candidates. Maximal degree in co-relation 16019. Up to 2259 conditions per place. [2024-06-28 04:17:37,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-28 04:17:37,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 2925 flow [2024-06-28 04:17:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:17:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:17:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 04:17:37,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 04:17:37,493 INFO L175 Difference]: Start difference. First operand has 164 places, 195 transitions, 2066 flow. Second operand 10 states and 164 transitions. [2024-06-28 04:17:37,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 2925 flow [2024-06-28 04:17:37,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 2736 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-28 04:17:37,582 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 2208 flow [2024-06-28 04:17:37,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2208, PETRI_PLACES=169, PETRI_TRANSITIONS=207} [2024-06-28 04:17:37,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-28 04:17:37,583 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 2208 flow [2024-06-28 04:17:37,583 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) [2024-06-28 04:17:37,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:37,584 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] [2024-06-28 04:17:37,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:17:37,584 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)] === [2024-06-28 04:17:37,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1948880363, now seen corresponding path program 3 times [2024-06-28 04:17:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476647280] [2024-06-28 04:17:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:40,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:40,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476647280] [2024-06-28 04:17:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476647280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:40,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:40,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:40,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939960644] [2024-06-28 04:17:40,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:40,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:40,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:40,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 207 transitions, 2208 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) [2024-06-28 04:17:40,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:40,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:40,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:41,508 INFO L124 PetriNetUnfolderBase]: 1534/2541 cut-off events. [2024-06-28 04:17:41,509 INFO L125 PetriNetUnfolderBase]: For 88413/88413 co-relation queries the response was YES. [2024-06-28 04:17:41,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16106 conditions, 2541 events. 1534/2541 cut-off events. For 88413/88413 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14170 event pairs, 360 based on Foata normal form. 4/2545 useless extension candidates. Maximal degree in co-relation 16029. Up to 2249 conditions per place. [2024-06-28 04:17:41,530 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-28 04:17:41,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 239 transitions, 2784 flow [2024-06-28 04:17:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:17:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:17:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-28 04:17:41,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-28 04:17:41,532 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 2208 flow. Second operand 11 states and 175 transitions. [2024-06-28 04:17:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 239 transitions, 2784 flow [2024-06-28 04:17:41,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 239 transitions, 2640 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:41,639 INFO L231 Difference]: Finished difference. Result has 174 places, 207 transitions, 2178 flow [2024-06-28 04:17:41,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2178, PETRI_PLACES=174, PETRI_TRANSITIONS=207} [2024-06-28 04:17:41,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-28 04:17:41,640 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 207 transitions, 2178 flow [2024-06-28 04:17:41,640 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) [2024-06-28 04:17:41,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:41,640 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] [2024-06-28 04:17:41,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:17:41,641 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)] === [2024-06-28 04:17:41,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1474036734, now seen corresponding path program 4 times [2024-06-28 04:17:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:41,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781164810] [2024-06-28 04:17:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:44,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:44,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781164810] [2024-06-28 04:17:44,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781164810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:44,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:44,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:44,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657018961] [2024-06-28 04:17:44,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:44,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:44,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:44,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:44,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 207 transitions, 2178 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) [2024-06-28 04:17:44,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:44,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:44,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:45,648 INFO L124 PetriNetUnfolderBase]: 1539/2552 cut-off events. [2024-06-28 04:17:45,648 INFO L125 PetriNetUnfolderBase]: For 88939/88939 co-relation queries the response was YES. [2024-06-28 04:17:45,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16224 conditions, 2552 events. 1539/2552 cut-off events. For 88939/88939 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14234 event pairs, 366 based on Foata normal form. 1/2553 useless extension candidates. Maximal degree in co-relation 16145. Up to 2313 conditions per place. [2024-06-28 04:17:45,669 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 33 changer transitions 0/233 dead transitions. [2024-06-28 04:17:45,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 233 transitions, 2749 flow [2024-06-28 04:17:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:17:45,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:17:45,672 INFO L175 Difference]: Start difference. First operand has 174 places, 207 transitions, 2178 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:17:45,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 233 transitions, 2749 flow [2024-06-28 04:17:45,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 233 transitions, 2625 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-28 04:17:45,777 INFO L231 Difference]: Finished difference. Result has 172 places, 210 transitions, 2175 flow [2024-06-28 04:17:45,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2175, PETRI_PLACES=172, PETRI_TRANSITIONS=210} [2024-06-28 04:17:45,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-28 04:17:45,778 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 210 transitions, 2175 flow [2024-06-28 04:17:45,778 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) [2024-06-28 04:17:45,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:45,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:17:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:17:45,779 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)] === [2024-06-28 04:17:45,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:45,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1473821067, now seen corresponding path program 1 times [2024-06-28 04:17:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:45,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359678611] [2024-06-28 04:17:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359678611] [2024-06-28 04:17:49,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359678611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:49,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:49,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:17:49,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195554667] [2024-06-28 04:17:49,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:49,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:17:49,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:49,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:17:49,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:17:49,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:17:49,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 210 transitions, 2175 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:49,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:49,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:17:49,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:50,977 INFO L124 PetriNetUnfolderBase]: 1459/2450 cut-off events. [2024-06-28 04:17:50,978 INFO L125 PetriNetUnfolderBase]: For 104321/104333 co-relation queries the response was YES. [2024-06-28 04:17:50,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15941 conditions, 2450 events. 1459/2450 cut-off events. For 104321/104333 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13900 event pairs, 343 based on Foata normal form. 12/2436 useless extension candidates. Maximal degree in co-relation 15861. Up to 2078 conditions per place. [2024-06-28 04:17:50,999 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2024-06-28 04:17:50,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 241 transitions, 2723 flow [2024-06-28 04:17:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:17:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:17:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:17:51,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:17:51,001 INFO L175 Difference]: Start difference. First operand has 172 places, 210 transitions, 2175 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:17:51,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 241 transitions, 2723 flow [2024-06-28 04:17:51,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 241 transitions, 2633 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:51,120 INFO L231 Difference]: Finished difference. Result has 175 places, 211 transitions, 2179 flow [2024-06-28 04:17:51,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2179, PETRI_PLACES=175, PETRI_TRANSITIONS=211} [2024-06-28 04:17:51,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-28 04:17:51,121 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 211 transitions, 2179 flow [2024-06-28 04:17:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:17:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:51,122 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] [2024-06-28 04:17:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:17:51,122 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)] === [2024-06-28 04:17:51,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -220405920, now seen corresponding path program 5 times [2024-06-28 04:17:51,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:51,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268684225] [2024-06-28 04:17:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:53,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268684225] [2024-06-28 04:17:53,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268684225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:53,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:53,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462090468] [2024-06-28 04:17:53,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:53,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:53,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 211 transitions, 2179 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) [2024-06-28 04:17:53,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:53,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:53,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:54,828 INFO L124 PetriNetUnfolderBase]: 1588/2617 cut-off events. [2024-06-28 04:17:54,828 INFO L125 PetriNetUnfolderBase]: For 97743/97743 co-relation queries the response was YES. [2024-06-28 04:17:54,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16823 conditions, 2617 events. 1588/2617 cut-off events. For 97743/97743 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14579 event pairs, 390 based on Foata normal form. 1/2617 useless extension candidates. Maximal degree in co-relation 16742. Up to 2237 conditions per place. [2024-06-28 04:17:54,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 83 changer transitions 0/242 dead transitions. [2024-06-28 04:17:54,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 242 transitions, 2957 flow [2024-06-28 04:17:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:17:54,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:17:54,853 INFO L175 Difference]: Start difference. First operand has 175 places, 211 transitions, 2179 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:17:54,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 242 transitions, 2957 flow [2024-06-28 04:17:54,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2885 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:17:54,986 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2329 flow [2024-06-28 04:17:54,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2329, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2024-06-28 04:17:54,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-28 04:17:54,987 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2329 flow [2024-06-28 04:17:54,987 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) [2024-06-28 04:17:54,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:54,987 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] [2024-06-28 04:17:54,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:17:54,987 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)] === [2024-06-28 04:17:54,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1574135946, now seen corresponding path program 6 times [2024-06-28 04:17:54,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:54,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950631175] [2024-06-28 04:17:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:54,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:17:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:17:57,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:17:57,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950631175] [2024-06-28 04:17:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950631175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:17:57,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:17:57,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:17:57,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664147499] [2024-06-28 04:17:57,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:17:57,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:17:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:17:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:17:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:17:57,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:17:57,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2329 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) [2024-06-28 04:17:57,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:17:57,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:17:57,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:17:59,286 INFO L124 PetriNetUnfolderBase]: 1593/2630 cut-off events. [2024-06-28 04:17:59,286 INFO L125 PetriNetUnfolderBase]: For 101542/101542 co-relation queries the response was YES. [2024-06-28 04:17:59,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17036 conditions, 2630 events. 1593/2630 cut-off events. For 101542/101542 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14675 event pairs, 398 based on Foata normal form. 1/2630 useless extension candidates. Maximal degree in co-relation 16954. Up to 2243 conditions per place. [2024-06-28 04:17:59,311 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 84 changer transitions 0/242 dead transitions. [2024-06-28 04:17:59,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 242 transitions, 3109 flow [2024-06-28 04:17:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:17:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:17:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:17:59,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 04:17:59,313 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2329 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:17:59,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 242 transitions, 3109 flow [2024-06-28 04:17:59,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 242 transitions, 2859 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 04:17:59,439 INFO L231 Difference]: Finished difference. Result has 178 places, 217 transitions, 2309 flow [2024-06-28 04:17:59,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2309, PETRI_PLACES=178, PETRI_TRANSITIONS=217} [2024-06-28 04:17:59,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-28 04:17:59,440 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 217 transitions, 2309 flow [2024-06-28 04:17:59,440 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) [2024-06-28 04:17:59,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:17:59,441 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] [2024-06-28 04:17:59,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:17:59,441 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)] === [2024-06-28 04:17:59,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:17:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1887834835, now seen corresponding path program 4 times [2024-06-28 04:17:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:17:59,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870063110] [2024-06-28 04:17:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:17:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:17:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:02,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:02,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870063110] [2024-06-28 04:18:02,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870063110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:02,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:02,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:02,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964992218] [2024-06-28 04:18:02,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:02,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:02,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:02,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 217 transitions, 2309 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) [2024-06-28 04:18:02,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:02,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:03,273 INFO L124 PetriNetUnfolderBase]: 1603/2646 cut-off events. [2024-06-28 04:18:03,273 INFO L125 PetriNetUnfolderBase]: For 105810/105816 co-relation queries the response was YES. [2024-06-28 04:18:03,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17132 conditions, 2646 events. 1603/2646 cut-off events. For 105810/105816 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14791 event pairs, 385 based on Foata normal form. 8/2654 useless extension candidates. Maximal degree in co-relation 17049. Up to 2356 conditions per place. [2024-06-28 04:18:03,296 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 58 changer transitions 0/247 dead transitions. [2024-06-28 04:18:03,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 247 transitions, 3001 flow [2024-06-28 04:18:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 04:18:03,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 04:18:03,298 INFO L175 Difference]: Start difference. First operand has 178 places, 217 transitions, 2309 flow. Second operand 9 states and 146 transitions. [2024-06-28 04:18:03,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 247 transitions, 3001 flow [2024-06-28 04:18:03,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 247 transitions, 2826 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:03,447 INFO L231 Difference]: Finished difference. Result has 182 places, 221 transitions, 2302 flow [2024-06-28 04:18:03,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2302, PETRI_PLACES=182, PETRI_TRANSITIONS=221} [2024-06-28 04:18:03,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-28 04:18:03,448 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 221 transitions, 2302 flow [2024-06-28 04:18:03,448 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) [2024-06-28 04:18:03,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:03,449 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] [2024-06-28 04:18:03,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:18:03,449 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)] === [2024-06-28 04:18:03,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:03,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1562707765, now seen corresponding path program 5 times [2024-06-28 04:18:03,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:03,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744634205] [2024-06-28 04:18:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:03,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:06,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744634205] [2024-06-28 04:18:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744634205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:06,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:06,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:06,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593565850] [2024-06-28 04:18:06,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:06,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:06,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:06,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:06,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 221 transitions, 2302 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) [2024-06-28 04:18:06,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:06,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:06,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:07,365 INFO L124 PetriNetUnfolderBase]: 1629/2692 cut-off events. [2024-06-28 04:18:07,365 INFO L125 PetriNetUnfolderBase]: For 112048/112054 co-relation queries the response was YES. [2024-06-28 04:18:07,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 2692 events. 1629/2692 cut-off events. For 112048/112054 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15131 event pairs, 378 based on Foata normal form. 8/2700 useless extension candidates. Maximal degree in co-relation 17432. Up to 2279 conditions per place. [2024-06-28 04:18:07,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 90 changer transitions 0/257 dead transitions. [2024-06-28 04:18:07,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 257 transitions, 3219 flow [2024-06-28 04:18:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:18:07,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:18:07,391 INFO L175 Difference]: Start difference. First operand has 182 places, 221 transitions, 2302 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:18:07,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 257 transitions, 3219 flow [2024-06-28 04:18:07,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 257 transitions, 3133 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:07,554 INFO L231 Difference]: Finished difference. Result has 186 places, 233 transitions, 2597 flow [2024-06-28 04:18:07,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2597, PETRI_PLACES=186, PETRI_TRANSITIONS=233} [2024-06-28 04:18:07,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-28 04:18:07,554 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 233 transitions, 2597 flow [2024-06-28 04:18:07,555 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) [2024-06-28 04:18:07,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:07,555 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] [2024-06-28 04:18:07,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:18:07,555 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)] === [2024-06-28 04:18:07,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2054227466, now seen corresponding path program 7 times [2024-06-28 04:18:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:07,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367696915] [2024-06-28 04:18:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:10,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:10,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367696915] [2024-06-28 04:18:10,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367696915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:10,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:10,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470921512] [2024-06-28 04:18:10,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:10,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:10,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:10,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:10,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 233 transitions, 2597 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) [2024-06-28 04:18:10,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:10,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:10,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:11,339 INFO L124 PetriNetUnfolderBase]: 1634/2689 cut-off events. [2024-06-28 04:18:11,339 INFO L125 PetriNetUnfolderBase]: For 117079/117079 co-relation queries the response was YES. [2024-06-28 04:18:11,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18194 conditions, 2689 events. 1634/2689 cut-off events. For 117079/117079 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15059 event pairs, 395 based on Foata normal form. 1/2689 useless extension candidates. Maximal degree in co-relation 18107. Up to 2299 conditions per place. [2024-06-28 04:18:11,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 91 changer transitions 0/255 dead transitions. [2024-06-28 04:18:11,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 255 transitions, 3288 flow [2024-06-28 04:18:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:18:11,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:18:11,368 INFO L175 Difference]: Start difference. First operand has 186 places, 233 transitions, 2597 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:18:11,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 255 transitions, 3288 flow [2024-06-28 04:18:11,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 255 transitions, 3209 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-28 04:18:11,521 INFO L231 Difference]: Finished difference. Result has 192 places, 236 transitions, 2749 flow [2024-06-28 04:18:11,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2749, PETRI_PLACES=192, PETRI_TRANSITIONS=236} [2024-06-28 04:18:11,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-28 04:18:11,522 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 236 transitions, 2749 flow [2024-06-28 04:18:11,523 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) [2024-06-28 04:18:11,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:11,523 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] [2024-06-28 04:18:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:18:11,523 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)] === [2024-06-28 04:18:11,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1563093715, now seen corresponding path program 6 times [2024-06-28 04:18:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467893760] [2024-06-28 04:18:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:14,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467893760] [2024-06-28 04:18:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467893760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:14,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:14,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640728583] [2024-06-28 04:18:14,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:14,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:14,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 236 transitions, 2749 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) [2024-06-28 04:18:14,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:14,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:15,411 INFO L124 PetriNetUnfolderBase]: 1628/2683 cut-off events. [2024-06-28 04:18:15,412 INFO L125 PetriNetUnfolderBase]: For 120685/120691 co-relation queries the response was YES. [2024-06-28 04:18:15,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18268 conditions, 2683 events. 1628/2683 cut-off events. For 120685/120691 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15062 event pairs, 381 based on Foata normal form. 8/2691 useless extension candidates. Maximal degree in co-relation 18178. Up to 2402 conditions per place. [2024-06-28 04:18:15,441 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 193 selfloop transitions, 57 changer transitions 0/255 dead transitions. [2024-06-28 04:18:15,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 255 transitions, 3303 flow [2024-06-28 04:18:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:18:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:18:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:18:15,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:18:15,445 INFO L175 Difference]: Start difference. First operand has 192 places, 236 transitions, 2749 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:18:15,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 255 transitions, 3303 flow [2024-06-28 04:18:15,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 255 transitions, 3134 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:15,596 INFO L231 Difference]: Finished difference. Result has 195 places, 236 transitions, 2700 flow [2024-06-28 04:18:15,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=195, PETRI_TRANSITIONS=236} [2024-06-28 04:18:15,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-28 04:18:15,597 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 236 transitions, 2700 flow [2024-06-28 04:18:15,597 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) [2024-06-28 04:18:15,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:15,597 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] [2024-06-28 04:18:15,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:18:15,598 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)] === [2024-06-28 04:18:15,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:15,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1670797781, now seen corresponding path program 7 times [2024-06-28 04:18:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:15,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643649945] [2024-06-28 04:18:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:15,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:18,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:18,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643649945] [2024-06-28 04:18:18,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643649945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:18,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:18,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:18,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180697395] [2024-06-28 04:18:18,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:18,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:18,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:18,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:18,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:18,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 236 transitions, 2700 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) [2024-06-28 04:18:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:18,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:19,402 INFO L124 PetriNetUnfolderBase]: 1686/2765 cut-off events. [2024-06-28 04:18:19,402 INFO L125 PetriNetUnfolderBase]: For 133750/133750 co-relation queries the response was YES. [2024-06-28 04:18:19,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19184 conditions, 2765 events. 1686/2765 cut-off events. For 133750/133750 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15465 event pairs, 394 based on Foata normal form. 2/2766 useless extension candidates. Maximal degree in co-relation 19093. Up to 2282 conditions per place. [2024-06-28 04:18:19,425 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 106 changer transitions 0/271 dead transitions. [2024-06-28 04:18:19,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 271 transitions, 3706 flow [2024-06-28 04:18:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:18:19,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:18:19,427 INFO L175 Difference]: Start difference. First operand has 195 places, 236 transitions, 2700 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:18:19,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 271 transitions, 3706 flow [2024-06-28 04:18:19,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 271 transitions, 3580 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 04:18:19,607 INFO L231 Difference]: Finished difference. Result has 195 places, 248 transitions, 3014 flow [2024-06-28 04:18:19,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3014, PETRI_PLACES=195, PETRI_TRANSITIONS=248} [2024-06-28 04:18:19,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-28 04:18:19,608 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 248 transitions, 3014 flow [2024-06-28 04:18:19,608 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) [2024-06-28 04:18:19,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:19,608 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] [2024-06-28 04:18:19,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:18:19,609 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)] === [2024-06-28 04:18:19,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash -806957728, now seen corresponding path program 8 times [2024-06-28 04:18:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:19,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793416564] [2024-06-28 04:18:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:22,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:22,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793416564] [2024-06-28 04:18:22,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793416564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:22,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:22,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:22,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117336395] [2024-06-28 04:18:22,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:22,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 248 transitions, 3014 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) [2024-06-28 04:18:22,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:23,289 INFO L124 PetriNetUnfolderBase]: 1683/2765 cut-off events. [2024-06-28 04:18:23,290 INFO L125 PetriNetUnfolderBase]: For 138906/138906 co-relation queries the response was YES. [2024-06-28 04:18:23,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19695 conditions, 2765 events. 1683/2765 cut-off events. For 138906/138906 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15527 event pairs, 401 based on Foata normal form. 1/2765 useless extension candidates. Maximal degree in co-relation 19603. Up to 2404 conditions per place. [2024-06-28 04:18:23,313 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 68 changer transitions 0/274 dead transitions. [2024-06-28 04:18:23,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 274 transitions, 3730 flow [2024-06-28 04:18:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:18:23,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-28 04:18:23,314 INFO L175 Difference]: Start difference. First operand has 195 places, 248 transitions, 3014 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:18:23,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 274 transitions, 3730 flow [2024-06-28 04:18:23,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 274 transitions, 3602 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 04:18:23,481 INFO L231 Difference]: Finished difference. Result has 200 places, 248 transitions, 3033 flow [2024-06-28 04:18:23,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=200, PETRI_TRANSITIONS=248} [2024-06-28 04:18:23,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-28 04:18:23,481 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 248 transitions, 3033 flow [2024-06-28 04:18:23,482 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) [2024-06-28 04:18:23,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:23,482 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] [2024-06-28 04:18:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:18:23,482 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)] === [2024-06-28 04:18:23,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash -612983567, now seen corresponding path program 8 times [2024-06-28 04:18:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128155546] [2024-06-28 04:18:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:26,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:26,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128155546] [2024-06-28 04:18:26,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128155546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:26,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:26,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:26,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249024791] [2024-06-28 04:18:26,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:26,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:26,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:26,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:26,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 248 transitions, 3033 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) [2024-06-28 04:18:26,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:26,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:26,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:28,069 INFO L124 PetriNetUnfolderBase]: 1703/2797 cut-off events. [2024-06-28 04:18:28,069 INFO L125 PetriNetUnfolderBase]: For 145531/145531 co-relation queries the response was YES. [2024-06-28 04:18:28,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19828 conditions, 2797 events. 1703/2797 cut-off events. For 145531/145531 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15731 event pairs, 376 based on Foata normal form. 4/2800 useless extension candidates. Maximal degree in co-relation 19734. Up to 2298 conditions per place. [2024-06-28 04:18:28,095 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 119 changer transitions 0/281 dead transitions. [2024-06-28 04:18:28,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 3983 flow [2024-06-28 04:18:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:18:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:18:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:18:28,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:18:28,096 INFO L175 Difference]: Start difference. First operand has 200 places, 248 transitions, 3033 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:18:28,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 3983 flow [2024-06-28 04:18:28,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 281 transitions, 3755 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 04:18:28,267 INFO L231 Difference]: Finished difference. Result has 201 places, 254 transitions, 3181 flow [2024-06-28 04:18:28,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3181, PETRI_PLACES=201, PETRI_TRANSITIONS=254} [2024-06-28 04:18:28,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-28 04:18:28,268 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 254 transitions, 3181 flow [2024-06-28 04:18:28,268 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) [2024-06-28 04:18:28,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:28,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:28,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:18:28,268 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)] === [2024-06-28 04:18:28,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash -806957387, now seen corresponding path program 9 times [2024-06-28 04:18:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:28,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303850346] [2024-06-28 04:18:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:31,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:31,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303850346] [2024-06-28 04:18:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303850346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:31,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:31,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314894373] [2024-06-28 04:18:31,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:31,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:31,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:31,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 254 transitions, 3181 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) [2024-06-28 04:18:31,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:31,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:31,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:32,157 INFO L124 PetriNetUnfolderBase]: 1697/2789 cut-off events. [2024-06-28 04:18:32,157 INFO L125 PetriNetUnfolderBase]: For 140133/140133 co-relation queries the response was YES. [2024-06-28 04:18:32,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19825 conditions, 2789 events. 1697/2789 cut-off events. For 140133/140133 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15664 event pairs, 404 based on Foata normal form. 2/2790 useless extension candidates. Maximal degree in co-relation 19731. Up to 2464 conditions per place. [2024-06-28 04:18:32,184 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 210 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-28 04:18:32,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 276 transitions, 3789 flow [2024-06-28 04:18:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:18:32,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-28 04:18:32,185 INFO L175 Difference]: Start difference. First operand has 201 places, 254 transitions, 3181 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:18:32,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 276 transitions, 3789 flow [2024-06-28 04:18:32,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 276 transitions, 3463 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:32,361 INFO L231 Difference]: Finished difference. Result has 202 places, 254 transitions, 2983 flow [2024-06-28 04:18:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2983, PETRI_PLACES=202, PETRI_TRANSITIONS=254} [2024-06-28 04:18:32,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-28 04:18:32,362 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 254 transitions, 2983 flow [2024-06-28 04:18:32,362 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) [2024-06-28 04:18:32,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:32,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:18:32,363 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)] === [2024-06-28 04:18:32,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash -607269647, now seen corresponding path program 10 times [2024-06-28 04:18:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:32,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177355618] [2024-06-28 04:18:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:34,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:34,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177355618] [2024-06-28 04:18:34,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177355618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:34,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:34,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490185232] [2024-06-28 04:18:34,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:34,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:34,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:34,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:34,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 254 transitions, 2983 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) [2024-06-28 04:18:34,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:34,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:34,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:36,069 INFO L124 PetriNetUnfolderBase]: 1691/2781 cut-off events. [2024-06-28 04:18:36,069 INFO L125 PetriNetUnfolderBase]: For 139816/139816 co-relation queries the response was YES. [2024-06-28 04:18:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19309 conditions, 2781 events. 1691/2781 cut-off events. For 139816/139816 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15636 event pairs, 381 based on Foata normal form. 2/2782 useless extension candidates. Maximal degree in co-relation 19214. Up to 2288 conditions per place. [2024-06-28 04:18:36,092 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 117 changer transitions 0/279 dead transitions. [2024-06-28 04:18:36,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 3805 flow [2024-06-28 04:18:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 04:18:36,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 04:18:36,094 INFO L175 Difference]: Start difference. First operand has 202 places, 254 transitions, 2983 flow. Second operand 9 states and 152 transitions. [2024-06-28 04:18:36,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 3805 flow [2024-06-28 04:18:36,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 279 transitions, 3663 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:36,282 INFO L231 Difference]: Finished difference. Result has 205 places, 254 transitions, 3081 flow [2024-06-28 04:18:36,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3081, PETRI_PLACES=205, PETRI_TRANSITIONS=254} [2024-06-28 04:18:36,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-28 04:18:36,283 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 254 transitions, 3081 flow [2024-06-28 04:18:36,283 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) [2024-06-28 04:18:36,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:36,283 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] [2024-06-28 04:18:36,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:18:36,284 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)] === [2024-06-28 04:18:36,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash -983881517, now seen corresponding path program 11 times [2024-06-28 04:18:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:36,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42387767] [2024-06-28 04:18:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:39,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42387767] [2024-06-28 04:18:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42387767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:39,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:39,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102650186] [2024-06-28 04:18:39,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:39,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:39,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:39,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 254 transitions, 3081 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) [2024-06-28 04:18:39,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:39,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:39,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:40,498 INFO L124 PetriNetUnfolderBase]: 1725/2845 cut-off events. [2024-06-28 04:18:40,498 INFO L125 PetriNetUnfolderBase]: For 144932/144932 co-relation queries the response was YES. [2024-06-28 04:18:40,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19798 conditions, 2845 events. 1725/2845 cut-off events. For 144932/144932 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16144 event pairs, 376 based on Foata normal form. 4/2849 useless extension candidates. Maximal degree in co-relation 19702. Up to 2418 conditions per place. [2024-06-28 04:18:40,523 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-28 04:18:40,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 300 transitions, 4033 flow [2024-06-28 04:18:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:18:40,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-28 04:18:40,524 INFO L175 Difference]: Start difference. First operand has 205 places, 254 transitions, 3081 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:18:40,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 300 transitions, 4033 flow [2024-06-28 04:18:40,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 300 transitions, 3723 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 04:18:40,720 INFO L231 Difference]: Finished difference. Result has 207 places, 266 transitions, 3204 flow [2024-06-28 04:18:40,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3204, PETRI_PLACES=207, PETRI_TRANSITIONS=266} [2024-06-28 04:18:40,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-28 04:18:40,721 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 266 transitions, 3204 flow [2024-06-28 04:18:40,721 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) [2024-06-28 04:18:40,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:40,721 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] [2024-06-28 04:18:40,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:18:40,721 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)] === [2024-06-28 04:18:40,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash -861253238, now seen corresponding path program 9 times [2024-06-28 04:18:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:40,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918547721] [2024-06-28 04:18:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:40,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918547721] [2024-06-28 04:18:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918547721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:43,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:43,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:43,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754429655] [2024-06-28 04:18:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:43,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:43,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:43,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:43,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 266 transitions, 3204 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) [2024-06-28 04:18:43,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:43,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:43,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:45,196 INFO L124 PetriNetUnfolderBase]: 1722/2845 cut-off events. [2024-06-28 04:18:45,196 INFO L125 PetriNetUnfolderBase]: For 143238/143238 co-relation queries the response was YES. [2024-06-28 04:18:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19859 conditions, 2845 events. 1722/2845 cut-off events. For 143238/143238 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16197 event pairs, 390 based on Foata normal form. 1/2846 useless extension candidates. Maximal degree in co-relation 19761. Up to 2461 conditions per place. [2024-06-28 04:18:45,224 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 72 changer transitions 0/306 dead transitions. [2024-06-28 04:18:45,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 3926 flow [2024-06-28 04:18:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:18:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:18:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:18:45,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-28 04:18:45,225 INFO L175 Difference]: Start difference. First operand has 207 places, 266 transitions, 3204 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:18:45,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 3926 flow [2024-06-28 04:18:45,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 306 transitions, 3715 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 04:18:45,462 INFO L231 Difference]: Finished difference. Result has 210 places, 266 transitions, 3153 flow [2024-06-28 04:18:45,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3153, PETRI_PLACES=210, PETRI_TRANSITIONS=266} [2024-06-28 04:18:45,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-28 04:18:45,463 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 266 transitions, 3153 flow [2024-06-28 04:18:45,463 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) [2024-06-28 04:18:45,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:45,463 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] [2024-06-28 04:18:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:18:45,463 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)] === [2024-06-28 04:18:45,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1471435471, now seen corresponding path program 12 times [2024-06-28 04:18:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:45,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478711058] [2024-06-28 04:18:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:48,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:48,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478711058] [2024-06-28 04:18:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478711058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:48,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:48,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:48,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364451542] [2024-06-28 04:18:48,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:48,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:48,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:48,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:48,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:18:48,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 266 transitions, 3153 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) [2024-06-28 04:18:48,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:48,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:18:48,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:49,743 INFO L124 PetriNetUnfolderBase]: 1710/2825 cut-off events. [2024-06-28 04:18:49,744 INFO L125 PetriNetUnfolderBase]: For 145808/145808 co-relation queries the response was YES. [2024-06-28 04:18:49,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19467 conditions, 2825 events. 1710/2825 cut-off events. For 145808/145808 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16104 event pairs, 374 based on Foata normal form. 4/2829 useless extension candidates. Maximal degree in co-relation 19368. Up to 2404 conditions per place. [2024-06-28 04:18:49,781 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 98 changer transitions 0/306 dead transitions. [2024-06-28 04:18:49,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 306 transitions, 3869 flow [2024-06-28 04:18:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:18:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:18:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-28 04:18:49,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-28 04:18:49,783 INFO L175 Difference]: Start difference. First operand has 210 places, 266 transitions, 3153 flow. Second operand 11 states and 188 transitions. [2024-06-28 04:18:49,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 306 transitions, 3869 flow [2024-06-28 04:18:50,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 3642 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-28 04:18:50,009 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3140 flow [2024-06-28 04:18:50,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3140, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-28 04:18:50,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-28 04:18:50,010 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3140 flow [2024-06-28 04:18:50,010 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) [2024-06-28 04:18:50,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:50,010 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] [2024-06-28 04:18:50,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:18:50,011 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)] === [2024-06-28 04:18:50,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -983873581, now seen corresponding path program 2 times [2024-06-28 04:18:50,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:50,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265691866] [2024-06-28 04:18:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:53,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265691866] [2024-06-28 04:18:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265691866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:53,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:53,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:18:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133870891] [2024-06-28 04:18:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:53,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:18:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:18:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:18:53,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:18:53,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3140 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:53,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:53,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:18:53,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:54,426 INFO L124 PetriNetUnfolderBase]: 1620/2707 cut-off events. [2024-06-28 04:18:54,426 INFO L125 PetriNetUnfolderBase]: For 152968/152972 co-relation queries the response was YES. [2024-06-28 04:18:54,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18887 conditions, 2707 events. 1620/2707 cut-off events. For 152968/152972 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15611 event pairs, 352 based on Foata normal form. 12/2687 useless extension candidates. Maximal degree in co-relation 18788. Up to 2235 conditions per place. [2024-06-28 04:18:54,457 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 217 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-28 04:18:54,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 294 transitions, 3774 flow [2024-06-28 04:18:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:54,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:18:54,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:18:54,459 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3140 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:18:54,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 294 transitions, 3774 flow [2024-06-28 04:18:54,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 294 transitions, 3544 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-28 04:18:54,638 INFO L231 Difference]: Finished difference. Result has 207 places, 267 transitions, 3022 flow [2024-06-28 04:18:54,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3022, PETRI_PLACES=207, PETRI_TRANSITIONS=267} [2024-06-28 04:18:54,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-28 04:18:54,640 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 267 transitions, 3022 flow [2024-06-28 04:18:54,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:54,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:54,640 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] [2024-06-28 04:18:54,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:18:54,641 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)] === [2024-06-28 04:18:54,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:54,641 INFO L85 PathProgramCache]: Analyzing trace with hash -612600841, now seen corresponding path program 3 times [2024-06-28 04:18:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:54,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073952049] [2024-06-28 04:18:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:54,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:58,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:58,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073952049] [2024-06-28 04:18:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073952049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:58,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:18:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736789780] [2024-06-28 04:18:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:58,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:18:58,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:18:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:18:58,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:18:58,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 267 transitions, 3022 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:58,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:58,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:18:58,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:59,201 INFO L124 PetriNetUnfolderBase]: 1659/2780 cut-off events. [2024-06-28 04:18:59,201 INFO L125 PetriNetUnfolderBase]: For 153722/153727 co-relation queries the response was YES. [2024-06-28 04:18:59,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19164 conditions, 2780 events. 1659/2780 cut-off events. For 153722/153727 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16203 event pairs, 361 based on Foata normal form. 12/2759 useless extension candidates. Maximal degree in co-relation 19065. Up to 2337 conditions per place. [2024-06-28 04:18:59,228 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 44 changer transitions 0/288 dead transitions. [2024-06-28 04:18:59,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 288 transitions, 3624 flow [2024-06-28 04:18:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:18:59,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 04:18:59,239 INFO L175 Difference]: Start difference. First operand has 207 places, 267 transitions, 3022 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:18:59,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 288 transitions, 3624 flow [2024-06-28 04:18:59,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 288 transitions, 3546 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:18:59,423 INFO L231 Difference]: Finished difference. Result has 209 places, 268 transitions, 3060 flow [2024-06-28 04:18:59,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3060, PETRI_PLACES=209, PETRI_TRANSITIONS=268} [2024-06-28 04:18:59,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-28 04:18:59,424 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 268 transitions, 3060 flow [2024-06-28 04:18:59,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:59,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:59,424 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] [2024-06-28 04:18:59,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:18:59,425 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)] === [2024-06-28 04:18:59,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash -599643151, now seen corresponding path program 4 times [2024-06-28 04:18:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674008787] [2024-06-28 04:18:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:59,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:02,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674008787] [2024-06-28 04:19:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674008787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:02,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39187331] [2024-06-28 04:19:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:02,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 04:19:02,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 268 transitions, 3060 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:02,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:02,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 04:19:02,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:03,746 INFO L124 PetriNetUnfolderBase]: 1661/2786 cut-off events. [2024-06-28 04:19:03,746 INFO L125 PetriNetUnfolderBase]: For 141460/141465 co-relation queries the response was YES. [2024-06-28 04:19:03,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18915 conditions, 2786 events. 1661/2786 cut-off events. For 141460/141465 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16232 event pairs, 357 based on Foata normal form. 8/2761 useless extension candidates. Maximal degree in co-relation 18815. Up to 2207 conditions per place. [2024-06-28 04:19:03,774 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 205 selfloop transitions, 48 changer transitions 0/291 dead transitions. [2024-06-28 04:19:03,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 291 transitions, 3688 flow [2024-06-28 04:19:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:19:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:19:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:19:03,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-28 04:19:03,775 INFO L175 Difference]: Start difference. First operand has 209 places, 268 transitions, 3060 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:19:03,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 291 transitions, 3688 flow [2024-06-28 04:19:03,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 291 transitions, 3596 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:03,971 INFO L231 Difference]: Finished difference. Result has 211 places, 269 transitions, 3090 flow [2024-06-28 04:19:03,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=211, PETRI_TRANSITIONS=269} [2024-06-28 04:19:03,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-28 04:19:03,972 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 269 transitions, 3090 flow [2024-06-28 04:19:03,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:03,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:03,972 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] [2024-06-28 04:19:03,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:19:03,972 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)] === [2024-06-28 04:19:03,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1566509109, now seen corresponding path program 1 times [2024-06-28 04:19:03,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:03,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112753981] [2024-06-28 04:19:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112753981] [2024-06-28 04:19:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112753981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:06,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:06,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:06,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540009579] [2024-06-28 04:19:06,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:06,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:06,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 269 transitions, 3090 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) [2024-06-28 04:19:06,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:06,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:07,373 INFO L124 PetriNetUnfolderBase]: 1861/3060 cut-off events. [2024-06-28 04:19:07,373 INFO L125 PetriNetUnfolderBase]: For 157550/157550 co-relation queries the response was YES. [2024-06-28 04:19:07,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20909 conditions, 3060 events. 1861/3060 cut-off events. For 157550/157550 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 17469 event pairs, 391 based on Foata normal form. 8/3067 useless extension candidates. Maximal degree in co-relation 20808. Up to 2673 conditions per place. [2024-06-28 04:19:07,399 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 32 changer transitions 0/305 dead transitions. [2024-06-28 04:19:07,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 305 transitions, 3972 flow [2024-06-28 04:19:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:07,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:19:07,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 04:19:07,401 INFO L175 Difference]: Start difference. First operand has 211 places, 269 transitions, 3090 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:19:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 305 transitions, 3972 flow [2024-06-28 04:19:07,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 305 transitions, 3866 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:07,616 INFO L231 Difference]: Finished difference. Result has 214 places, 271 transitions, 3090 flow [2024-06-28 04:19:07,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3090, PETRI_PLACES=214, PETRI_TRANSITIONS=271} [2024-06-28 04:19:07,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-28 04:19:07,617 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 271 transitions, 3090 flow [2024-06-28 04:19:07,617 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) [2024-06-28 04:19:07,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:07,617 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] [2024-06-28 04:19:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:19:07,618 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)] === [2024-06-28 04:19:07,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1423007319, now seen corresponding path program 2 times [2024-06-28 04:19:07,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:07,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519450335] [2024-06-28 04:19:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:07,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519450335] [2024-06-28 04:19:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519450335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:09,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:09,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236193466] [2024-06-28 04:19:09,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:09,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:09,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:09,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:09,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 271 transitions, 3090 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) [2024-06-28 04:19:09,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:09,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:09,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:11,163 INFO L124 PetriNetUnfolderBase]: 1948/3202 cut-off events. [2024-06-28 04:19:11,163 INFO L125 PetriNetUnfolderBase]: For 178948/178948 co-relation queries the response was YES. [2024-06-28 04:19:11,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22255 conditions, 3202 events. 1948/3202 cut-off events. For 178948/178948 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18493 event pairs, 436 based on Foata normal form. 8/3209 useless extension candidates. Maximal degree in co-relation 22153. Up to 2862 conditions per place. [2024-06-28 04:19:11,195 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 269 selfloop transitions, 29 changer transitions 0/303 dead transitions. [2024-06-28 04:19:11,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 303 transitions, 3962 flow [2024-06-28 04:19:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:19:11,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 04:19:11,197 INFO L175 Difference]: Start difference. First operand has 214 places, 271 transitions, 3090 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:19:11,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 303 transitions, 3962 flow [2024-06-28 04:19:11,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 303 transitions, 3919 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:11,439 INFO L231 Difference]: Finished difference. Result has 218 places, 273 transitions, 3151 flow [2024-06-28 04:19:11,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3151, PETRI_PLACES=218, PETRI_TRANSITIONS=273} [2024-06-28 04:19:11,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-28 04:19:11,440 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 273 transitions, 3151 flow [2024-06-28 04:19:11,440 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) [2024-06-28 04:19:11,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:11,440 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] [2024-06-28 04:19:11,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:19:11,440 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)] === [2024-06-28 04:19:11,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1336319229, now seen corresponding path program 3 times [2024-06-28 04:19:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130968523] [2024-06-28 04:19:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130968523] [2024-06-28 04:19:13,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130968523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:13,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:13,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243481544] [2024-06-28 04:19:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:13,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:13,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 273 transitions, 3151 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) [2024-06-28 04:19:13,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:13,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:13,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:15,462 INFO L124 PetriNetUnfolderBase]: 1925/3169 cut-off events. [2024-06-28 04:19:15,462 INFO L125 PetriNetUnfolderBase]: For 171131/171131 co-relation queries the response was YES. [2024-06-28 04:19:15,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21645 conditions, 3169 events. 1925/3169 cut-off events. For 171131/171131 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18288 event pairs, 431 based on Foata normal form. 10/3178 useless extension candidates. Maximal degree in co-relation 21541. Up to 2890 conditions per place. [2024-06-28 04:19:15,494 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 27 changer transitions 0/298 dead transitions. [2024-06-28 04:19:15,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 298 transitions, 3837 flow [2024-06-28 04:19:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:19:15,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:19:15,496 INFO L175 Difference]: Start difference. First operand has 218 places, 273 transitions, 3151 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:19:15,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 298 transitions, 3837 flow [2024-06-28 04:19:15,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 298 transitions, 3789 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:15,767 INFO L231 Difference]: Finished difference. Result has 222 places, 273 transitions, 3162 flow [2024-06-28 04:19:15,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3162, PETRI_PLACES=222, PETRI_TRANSITIONS=273} [2024-06-28 04:19:15,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-28 04:19:15,784 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 273 transitions, 3162 flow [2024-06-28 04:19:15,784 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) [2024-06-28 04:19:15,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:15,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:19:15,784 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)] === [2024-06-28 04:19:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -607261711, now seen corresponding path program 4 times [2024-06-28 04:19:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505765968] [2024-06-28 04:19:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:18,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:18,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505765968] [2024-06-28 04:19:18,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505765968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:18,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:18,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253299606] [2024-06-28 04:19:18,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:18,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:18,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:18,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:18,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 273 transitions, 3162 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) [2024-06-28 04:19:18,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:18,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:18,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:19,561 INFO L124 PetriNetUnfolderBase]: 1961/3225 cut-off events. [2024-06-28 04:19:19,561 INFO L125 PetriNetUnfolderBase]: For 176700/176700 co-relation queries the response was YES. [2024-06-28 04:19:19,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 3225 events. 1961/3225 cut-off events. For 176700/176700 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18632 event pairs, 443 based on Foata normal form. 10/3234 useless extension candidates. Maximal degree in co-relation 21965. Up to 2955 conditions per place. [2024-06-28 04:19:19,589 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 23 changer transitions 0/300 dead transitions. [2024-06-28 04:19:19,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 300 transitions, 3876 flow [2024-06-28 04:19:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 04:19:19,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-28 04:19:19,591 INFO L175 Difference]: Start difference. First operand has 222 places, 273 transitions, 3162 flow. Second operand 9 states and 142 transitions. [2024-06-28 04:19:19,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 300 transitions, 3876 flow [2024-06-28 04:19:19,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 300 transitions, 3817 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:19,876 INFO L231 Difference]: Finished difference. Result has 224 places, 274 transitions, 3178 flow [2024-06-28 04:19:19,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3178, PETRI_PLACES=224, PETRI_TRANSITIONS=274} [2024-06-28 04:19:19,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-28 04:19:19,877 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 274 transitions, 3178 flow [2024-06-28 04:19:19,877 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) [2024-06-28 04:19:19,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:19,877 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] [2024-06-28 04:19:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:19:19,877 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)] === [2024-06-28 04:19:19,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash -806563501, now seen corresponding path program 5 times [2024-06-28 04:19:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923209627] [2024-06-28 04:19:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:22,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:22,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923209627] [2024-06-28 04:19:22,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923209627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:22,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:22,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:22,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729676526] [2024-06-28 04:19:22,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:22,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:22,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:22,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 274 transitions, 3178 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) [2024-06-28 04:19:22,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:22,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:22,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:23,429 INFO L124 PetriNetUnfolderBase]: 1984/3262 cut-off events. [2024-06-28 04:19:23,429 INFO L125 PetriNetUnfolderBase]: For 179343/179343 co-relation queries the response was YES. [2024-06-28 04:19:23,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22284 conditions, 3262 events. 1984/3262 cut-off events. For 179343/179343 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18875 event pairs, 450 based on Foata normal form. 10/3271 useless extension candidates. Maximal degree in co-relation 22177. Up to 2992 conditions per place. [2024-06-28 04:19:23,462 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 22 changer transitions 0/299 dead transitions. [2024-06-28 04:19:23,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 299 transitions, 3888 flow [2024-06-28 04:19:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:19:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:19:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:19:23,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 04:19:23,464 INFO L175 Difference]: Start difference. First operand has 224 places, 274 transitions, 3178 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:19:23,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 299 transitions, 3888 flow [2024-06-28 04:19:23,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 299 transitions, 3835 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:23,758 INFO L231 Difference]: Finished difference. Result has 224 places, 275 transitions, 3200 flow [2024-06-28 04:19:23,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3200, PETRI_PLACES=224, PETRI_TRANSITIONS=275} [2024-06-28 04:19:23,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-28 04:19:23,758 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 275 transitions, 3200 flow [2024-06-28 04:19:23,758 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) [2024-06-28 04:19:23,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:23,759 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] [2024-06-28 04:19:23,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:19:23,759 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)] === [2024-06-28 04:19:23,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash -806711371, now seen corresponding path program 6 times [2024-06-28 04:19:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323917921] [2024-06-28 04:19:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:26,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323917921] [2024-06-28 04:19:26,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323917921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:26,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:26,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:26,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934921400] [2024-06-28 04:19:26,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:26,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:26,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:26,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 275 transitions, 3200 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) [2024-06-28 04:19:26,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:26,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:27,241 INFO L124 PetriNetUnfolderBase]: 1966/3229 cut-off events. [2024-06-28 04:19:27,242 INFO L125 PetriNetUnfolderBase]: For 166207/166207 co-relation queries the response was YES. [2024-06-28 04:19:27,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3229 events. 1966/3229 cut-off events. For 166207/166207 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18595 event pairs, 398 based on Foata normal form. 8/3236 useless extension candidates. Maximal degree in co-relation 21556. Up to 2864 conditions per place. [2024-06-28 04:19:27,274 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 27 changer transitions 0/306 dead transitions. [2024-06-28 04:19:27,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 306 transitions, 3932 flow [2024-06-28 04:19:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:19:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:19:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:19:27,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-28 04:19:27,276 INFO L175 Difference]: Start difference. First operand has 224 places, 275 transitions, 3200 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:19:27,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 306 transitions, 3932 flow [2024-06-28 04:19:27,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 306 transitions, 3875 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:27,559 INFO L231 Difference]: Finished difference. Result has 226 places, 275 transitions, 3201 flow [2024-06-28 04:19:27,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3201, PETRI_PLACES=226, PETRI_TRANSITIONS=275} [2024-06-28 04:19:27,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-28 04:19:27,561 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 275 transitions, 3201 flow [2024-06-28 04:19:27,561 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) [2024-06-28 04:19:27,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:27,561 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] [2024-06-28 04:19:27,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:19:27,562 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)] === [2024-06-28 04:19:27,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash -599637199, now seen corresponding path program 1 times [2024-06-28 04:19:27,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:27,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609425309] [2024-06-28 04:19:27,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:27,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:30,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:30,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609425309] [2024-06-28 04:19:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609425309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:30,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:30,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:30,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497455747] [2024-06-28 04:19:30,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:30,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:30,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:30,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:30,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 275 transitions, 3201 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:30,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:30,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:30,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:32,043 INFO L124 PetriNetUnfolderBase]: 1953/3217 cut-off events. [2024-06-28 04:19:32,043 INFO L125 PetriNetUnfolderBase]: For 155163/155163 co-relation queries the response was YES. [2024-06-28 04:19:32,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21190 conditions, 3217 events. 1953/3217 cut-off events. For 155163/155163 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18605 event pairs, 417 based on Foata normal form. 6/3222 useless extension candidates. Maximal degree in co-relation 21081. Up to 2875 conditions per place. [2024-06-28 04:19:32,078 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 27 changer transitions 0/303 dead transitions. [2024-06-28 04:19:32,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 303 transitions, 3927 flow [2024-06-28 04:19:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:19:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:19:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 04:19:32,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 04:19:32,080 INFO L175 Difference]: Start difference. First operand has 226 places, 275 transitions, 3201 flow. Second operand 9 states and 143 transitions. [2024-06-28 04:19:32,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 303 transitions, 3927 flow [2024-06-28 04:19:32,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 303 transitions, 3823 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:32,368 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 3155 flow [2024-06-28 04:19:32,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3155, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-28 04:19:32,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-28 04:19:32,369 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 3155 flow [2024-06-28 04:19:32,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:32,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:32,369 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] [2024-06-28 04:19:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:19:32,370 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)] === [2024-06-28 04:19:32,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1892523622, now seen corresponding path program 1 times [2024-06-28 04:19:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:32,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402654579] [2024-06-28 04:19:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:32,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:35,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:35,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402654579] [2024-06-28 04:19:35,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402654579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:35,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995780768] [2024-06-28 04:19:35,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:35,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:35,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:35,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 3155 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:35,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:35,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:35,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:37,095 INFO L124 PetriNetUnfolderBase]: 2021/3326 cut-off events. [2024-06-28 04:19:37,096 INFO L125 PetriNetUnfolderBase]: For 164182/164182 co-relation queries the response was YES. [2024-06-28 04:19:37,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21629 conditions, 3326 events. 2021/3326 cut-off events. For 164182/164182 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19234 event pairs, 362 based on Foata normal form. 8/3334 useless extension candidates. Maximal degree in co-relation 21520. Up to 2790 conditions per place. [2024-06-28 04:19:37,139 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 49 changer transitions 0/327 dead transitions. [2024-06-28 04:19:37,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 327 transitions, 4145 flow [2024-06-28 04:19:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:19:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:19:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 04:19:37,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:19:37,141 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 3155 flow. Second operand 11 states and 187 transitions. [2024-06-28 04:19:37,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 327 transitions, 4145 flow [2024-06-28 04:19:37,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4060 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 04:19:37,537 INFO L231 Difference]: Finished difference. Result has 232 places, 278 transitions, 3242 flow [2024-06-28 04:19:37,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3242, PETRI_PLACES=232, PETRI_TRANSITIONS=278} [2024-06-28 04:19:37,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-28 04:19:37,538 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 278 transitions, 3242 flow [2024-06-28 04:19:37,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:37,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:37,538 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] [2024-06-28 04:19:37,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:19:37,538 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)] === [2024-06-28 04:19:37,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1268635160, now seen corresponding path program 2 times [2024-06-28 04:19:37,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:37,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210145463] [2024-06-28 04:19:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:37,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:40,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:40,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210145463] [2024-06-28 04:19:40,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210145463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:40,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:40,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:40,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563897102] [2024-06-28 04:19:40,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:40,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:40,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:40,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:40,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:40,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 278 transitions, 3242 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:40,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:40,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:40,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:42,442 INFO L124 PetriNetUnfolderBase]: 2108/3459 cut-off events. [2024-06-28 04:19:42,442 INFO L125 PetriNetUnfolderBase]: For 171146/171146 co-relation queries the response was YES. [2024-06-28 04:19:42,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 3459 events. 2108/3459 cut-off events. For 171146/171146 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20171 event pairs, 447 based on Foata normal form. 8/3465 useless extension candidates. Maximal degree in co-relation 22468. Up to 3068 conditions per place. [2024-06-28 04:19:42,473 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 52 changer transitions 0/333 dead transitions. [2024-06-28 04:19:42,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 333 transitions, 4211 flow [2024-06-28 04:19:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:19:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:19:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-28 04:19:42,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-28 04:19:42,474 INFO L175 Difference]: Start difference. First operand has 232 places, 278 transitions, 3242 flow. Second operand 12 states and 194 transitions. [2024-06-28 04:19:42,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 333 transitions, 4211 flow [2024-06-28 04:19:42,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 333 transitions, 4003 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-28 04:19:42,838 INFO L231 Difference]: Finished difference. Result has 236 places, 288 transitions, 3309 flow [2024-06-28 04:19:42,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3309, PETRI_PLACES=236, PETRI_TRANSITIONS=288} [2024-06-28 04:19:42,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-28 04:19:42,838 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 288 transitions, 3309 flow [2024-06-28 04:19:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:42,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:42,839 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] [2024-06-28 04:19:42,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:19:42,839 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)] === [2024-06-28 04:19:42,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1263220886, now seen corresponding path program 1 times [2024-06-28 04:19:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:42,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550641468] [2024-06-28 04:19:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:42,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550641468] [2024-06-28 04:19:46,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550641468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:46,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:46,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:46,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935895536] [2024-06-28 04:19:46,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:46,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:46,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:46,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 288 transitions, 3309 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:46,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:46,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:46,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:47,615 INFO L124 PetriNetUnfolderBase]: 2118/3483 cut-off events. [2024-06-28 04:19:47,616 INFO L125 PetriNetUnfolderBase]: For 159360/159360 co-relation queries the response was YES. [2024-06-28 04:19:47,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22347 conditions, 3483 events. 2118/3483 cut-off events. For 159360/159360 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20362 event pairs, 457 based on Foata normal form. 2/3485 useless extension candidates. Maximal degree in co-relation 22238. Up to 3083 conditions per place. [2024-06-28 04:19:47,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 78 changer transitions 0/332 dead transitions. [2024-06-28 04:19:47,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 332 transitions, 4261 flow [2024-06-28 04:19:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:19:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:19:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 04:19:47,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-28 04:19:47,654 INFO L175 Difference]: Start difference. First operand has 236 places, 288 transitions, 3309 flow. Second operand 11 states and 184 transitions. [2024-06-28 04:19:47,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 332 transitions, 4261 flow [2024-06-28 04:19:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 332 transitions, 4151 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:47,991 INFO L231 Difference]: Finished difference. Result has 240 places, 291 transitions, 3427 flow [2024-06-28 04:19:47,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3427, PETRI_PLACES=240, PETRI_TRANSITIONS=291} [2024-06-28 04:19:47,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-28 04:19:47,992 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 291 transitions, 3427 flow [2024-06-28 04:19:47,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:47,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:47,993 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] [2024-06-28 04:19:47,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:19:47,993 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)] === [2024-06-28 04:19:47,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1545691460, now seen corresponding path program 3 times [2024-06-28 04:19:47,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:47,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207160406] [2024-06-28 04:19:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:51,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:51,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207160406] [2024-06-28 04:19:51,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207160406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:51,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:51,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091364632] [2024-06-28 04:19:51,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:51,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:51,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 291 transitions, 3427 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:51,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:51,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:51,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:52,783 INFO L124 PetriNetUnfolderBase]: 2154/3531 cut-off events. [2024-06-28 04:19:52,783 INFO L125 PetriNetUnfolderBase]: For 178518/178518 co-relation queries the response was YES. [2024-06-28 04:19:52,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23090 conditions, 3531 events. 2154/3531 cut-off events. For 178518/178518 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20621 event pairs, 458 based on Foata normal form. 8/3539 useless extension candidates. Maximal degree in co-relation 22980. Up to 3132 conditions per place. [2024-06-28 04:19:52,818 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 52 changer transitions 0/334 dead transitions. [2024-06-28 04:19:52,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 334 transitions, 4301 flow [2024-06-28 04:19:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:19:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:19:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-28 04:19:52,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:19:52,820 INFO L175 Difference]: Start difference. First operand has 240 places, 291 transitions, 3427 flow. Second operand 12 states and 189 transitions. [2024-06-28 04:19:52,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 334 transitions, 4301 flow [2024-06-28 04:19:53,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 334 transitions, 4085 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-28 04:19:53,190 INFO L231 Difference]: Finished difference. Result has 247 places, 296 transitions, 3424 flow [2024-06-28 04:19:53,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3424, PETRI_PLACES=247, PETRI_TRANSITIONS=296} [2024-06-28 04:19:53,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-28 04:19:53,191 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 296 transitions, 3424 flow [2024-06-28 04:19:53,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:53,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:53,191 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] [2024-06-28 04:19:53,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:19:53,191 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)] === [2024-06-28 04:19:53,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1265721164, now seen corresponding path program 1 times [2024-06-28 04:19:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186872985] [2024-06-28 04:19:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:53,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:56,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186872985] [2024-06-28 04:19:56,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186872985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:56,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:56,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646892360] [2024-06-28 04:19:56,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:56,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:19:56,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 296 transitions, 3424 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) [2024-06-28 04:19:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:56,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:19:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:57,443 INFO L124 PetriNetUnfolderBase]: 2175/3564 cut-off events. [2024-06-28 04:19:57,443 INFO L125 PetriNetUnfolderBase]: For 175505/175505 co-relation queries the response was YES. [2024-06-28 04:19:57,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23444 conditions, 3564 events. 2175/3564 cut-off events. For 175505/175505 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 20889 event pairs, 486 based on Foata normal form. 2/3565 useless extension candidates. Maximal degree in co-relation 23330. Up to 3178 conditions per place. [2024-06-28 04:19:57,484 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 59 changer transitions 0/332 dead transitions. [2024-06-28 04:19:57,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 332 transitions, 4374 flow [2024-06-28 04:19:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:19:57,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 04:19:57,485 INFO L175 Difference]: Start difference. First operand has 247 places, 296 transitions, 3424 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:19:57,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 332 transitions, 4374 flow [2024-06-28 04:19:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 332 transitions, 4248 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:57,864 INFO L231 Difference]: Finished difference. Result has 248 places, 300 transitions, 3502 flow [2024-06-28 04:19:57,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3502, PETRI_PLACES=248, PETRI_TRANSITIONS=300} [2024-06-28 04:19:57,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-28 04:19:57,864 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 300 transitions, 3502 flow [2024-06-28 04:19:57,865 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) [2024-06-28 04:19:57,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:57,865 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] [2024-06-28 04:19:57,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:19:57,865 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)] === [2024-06-28 04:19:57,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash -383268268, now seen corresponding path program 2 times [2024-06-28 04:19:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396178216] [2024-06-28 04:19:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:01,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:01,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396178216] [2024-06-28 04:20:01,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396178216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:01,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:01,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:20:01,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439309483] [2024-06-28 04:20:01,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:01,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:20:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:20:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:20:01,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:01,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 300 transitions, 3502 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) [2024-06-28 04:20:01,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:01,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:01,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:02,808 INFO L124 PetriNetUnfolderBase]: 2183/3582 cut-off events. [2024-06-28 04:20:02,808 INFO L125 PetriNetUnfolderBase]: For 177049/177049 co-relation queries the response was YES. [2024-06-28 04:20:02,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23322 conditions, 3582 events. 2183/3582 cut-off events. For 177049/177049 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21043 event pairs, 496 based on Foata normal form. 2/3583 useless extension candidates. Maximal degree in co-relation 23207. Up to 3257 conditions per place. [2024-06-28 04:20:02,844 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 56 changer transitions 0/328 dead transitions. [2024-06-28 04:20:02,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 328 transitions, 4262 flow [2024-06-28 04:20:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:20:02,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-28 04:20:02,846 INFO L175 Difference]: Start difference. First operand has 248 places, 300 transitions, 3502 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:20:02,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 328 transitions, 4262 flow [2024-06-28 04:20:03,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 328 transitions, 4137 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:03,251 INFO L231 Difference]: Finished difference. Result has 252 places, 302 transitions, 3538 flow [2024-06-28 04:20:03,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3538, PETRI_PLACES=252, PETRI_TRANSITIONS=302} [2024-06-28 04:20:03,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-28 04:20:03,252 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 302 transitions, 3538 flow [2024-06-28 04:20:03,252 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) [2024-06-28 04:20:03,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:03,252 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] [2024-06-28 04:20:03,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:20:03,252 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)] === [2024-06-28 04:20:03,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash -391605780, now seen corresponding path program 2 times [2024-06-28 04:20:03,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:03,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058508895] [2024-06-28 04:20:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:03,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058508895] [2024-06-28 04:20:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058508895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:06,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26562480] [2024-06-28 04:20:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:06,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:06,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 302 transitions, 3538 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:06,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:06,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:06,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:08,207 INFO L124 PetriNetUnfolderBase]: 2225/3648 cut-off events. [2024-06-28 04:20:08,207 INFO L125 PetriNetUnfolderBase]: For 192376/192376 co-relation queries the response was YES. [2024-06-28 04:20:08,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24196 conditions, 3648 events. 2225/3648 cut-off events. For 192376/192376 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21470 event pairs, 480 based on Foata normal form. 2/3649 useless extension candidates. Maximal degree in co-relation 24079. Up to 2982 conditions per place. [2024-06-28 04:20:08,246 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 163 changer transitions 0/352 dead transitions. [2024-06-28 04:20:08,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 352 transitions, 4930 flow [2024-06-28 04:20:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:20:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:20:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-28 04:20:08,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 04:20:08,248 INFO L175 Difference]: Start difference. First operand has 252 places, 302 transitions, 3538 flow. Second operand 12 states and 200 transitions. [2024-06-28 04:20:08,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 352 transitions, 4930 flow [2024-06-28 04:20:08,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 352 transitions, 4805 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:08,788 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 3937 flow [2024-06-28 04:20:08,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3937, PETRI_PLACES=258, PETRI_TRANSITIONS=311} [2024-06-28 04:20:08,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-28 04:20:08,789 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 3937 flow [2024-06-28 04:20:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:08,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:08,789 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] [2024-06-28 04:20:08,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:20:08,789 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)] === [2024-06-28 04:20:08,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1418847324, now seen corresponding path program 3 times [2024-06-28 04:20:08,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:08,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158684996] [2024-06-28 04:20:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:08,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158684996] [2024-06-28 04:20:11,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158684996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:11,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:11,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:11,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704755489] [2024-06-28 04:20:11,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:11,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:11,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:11,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:11,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 311 transitions, 3937 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:11,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:11,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:11,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:13,374 INFO L124 PetriNetUnfolderBase]: 2251/3684 cut-off events. [2024-06-28 04:20:13,375 INFO L125 PetriNetUnfolderBase]: For 206901/206901 co-relation queries the response was YES. [2024-06-28 04:20:13,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25415 conditions, 3684 events. 2251/3684 cut-off events. For 206901/206901 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21663 event pairs, 482 based on Foata normal form. 2/3685 useless extension candidates. Maximal degree in co-relation 25297. Up to 3007 conditions per place. [2024-06-28 04:20:13,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 163 changer transitions 0/353 dead transitions. [2024-06-28 04:20:13,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 353 transitions, 5273 flow [2024-06-28 04:20:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:20:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:20:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 04:20:13,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-28 04:20:13,412 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 3937 flow. Second operand 11 states and 185 transitions. [2024-06-28 04:20:13,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 353 transitions, 5273 flow [2024-06-28 04:20:13,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 353 transitions, 4989 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:13,951 INFO L231 Difference]: Finished difference. Result has 263 places, 317 transitions, 4121 flow [2024-06-28 04:20:13,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4121, PETRI_PLACES=263, PETRI_TRANSITIONS=317} [2024-06-28 04:20:13,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-28 04:20:13,952 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 317 transitions, 4121 flow [2024-06-28 04:20:13,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:13,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:13,952 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] [2024-06-28 04:20:13,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:20:13,952 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)] === [2024-06-28 04:20:13,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1268572482, now seen corresponding path program 4 times [2024-06-28 04:20:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140790181] [2024-06-28 04:20:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:17,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:17,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140790181] [2024-06-28 04:20:17,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140790181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:17,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:17,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:17,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426376495] [2024-06-28 04:20:17,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:17,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:17,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:17,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:17,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:17,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 317 transitions, 4121 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:17,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:17,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:17,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:19,052 INFO L124 PetriNetUnfolderBase]: 2245/3680 cut-off events. [2024-06-28 04:20:19,052 INFO L125 PetriNetUnfolderBase]: For 205650/205650 co-relation queries the response was YES. [2024-06-28 04:20:19,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25381 conditions, 3680 events. 2245/3680 cut-off events. For 205650/205650 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21737 event pairs, 480 based on Foata normal form. 2/3681 useless extension candidates. Maximal degree in co-relation 25261. Up to 3002 conditions per place. [2024-06-28 04:20:19,099 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 164 changer transitions 0/355 dead transitions. [2024-06-28 04:20:19,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 355 transitions, 5197 flow [2024-06-28 04:20:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:20:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:20:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 209 transitions. [2024-06-28 04:20:19,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921200750469043 [2024-06-28 04:20:19,101 INFO L175 Difference]: Start difference. First operand has 263 places, 317 transitions, 4121 flow. Second operand 13 states and 209 transitions. [2024-06-28 04:20:19,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 355 transitions, 5197 flow [2024-06-28 04:20:19,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 355 transitions, 4891 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 04:20:19,772 INFO L231 Difference]: Finished difference. Result has 269 places, 317 transitions, 4149 flow [2024-06-28 04:20:19,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4149, PETRI_PLACES=269, PETRI_TRANSITIONS=317} [2024-06-28 04:20:19,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-28 04:20:19,776 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 317 transitions, 4149 flow [2024-06-28 04:20:19,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:19,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:19,777 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] [2024-06-28 04:20:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:20:19,777 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)] === [2024-06-28 04:20:19,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1549508428, now seen corresponding path program 3 times [2024-06-28 04:20:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:19,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080176008] [2024-06-28 04:20:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:19,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:22,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080176008] [2024-06-28 04:20:22,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080176008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:22,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:22,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:20:22,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225306776] [2024-06-28 04:20:22,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:22,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:20:22,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:20:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:20:22,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:22,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 317 transitions, 4149 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) [2024-06-28 04:20:22,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:22,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:22,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:24,141 INFO L124 PetriNetUnfolderBase]: 2281/3740 cut-off events. [2024-06-28 04:20:24,141 INFO L125 PetriNetUnfolderBase]: For 211411/211411 co-relation queries the response was YES. [2024-06-28 04:20:24,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25764 conditions, 3740 events. 2281/3740 cut-off events. For 211411/211411 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22142 event pairs, 501 based on Foata normal form. 2/3742 useless extension candidates. Maximal degree in co-relation 25643. Up to 3403 conditions per place. [2024-06-28 04:20:24,179 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 36 changer transitions 0/346 dead transitions. [2024-06-28 04:20:24,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 346 transitions, 4987 flow [2024-06-28 04:20:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:20:24,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-28 04:20:24,180 INFO L175 Difference]: Start difference. First operand has 269 places, 317 transitions, 4149 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:20:24,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 346 transitions, 4987 flow [2024-06-28 04:20:24,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 4641 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-28 04:20:24,794 INFO L231 Difference]: Finished difference. Result has 265 places, 320 transitions, 3927 flow [2024-06-28 04:20:24,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3927, PETRI_PLACES=265, PETRI_TRANSITIONS=320} [2024-06-28 04:20:24,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-28 04:20:24,795 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 320 transitions, 3927 flow [2024-06-28 04:20:24,795 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) [2024-06-28 04:20:24,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:24,795 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] [2024-06-28 04:20:24,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:20:24,796 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)] === [2024-06-28 04:20:24,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -285748166, now seen corresponding path program 5 times [2024-06-28 04:20:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910971256] [2024-06-28 04:20:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:28,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910971256] [2024-06-28 04:20:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910971256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:28,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:28,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:28,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711910344] [2024-06-28 04:20:28,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:28,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:28,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 320 transitions, 3927 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:28,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:28,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:28,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:29,581 INFO L124 PetriNetUnfolderBase]: 2307/3778 cut-off events. [2024-06-28 04:20:29,581 INFO L125 PetriNetUnfolderBase]: For 221231/221231 co-relation queries the response was YES. [2024-06-28 04:20:29,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25832 conditions, 3778 events. 2307/3778 cut-off events. For 221231/221231 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22385 event pairs, 486 based on Foata normal form. 2/3780 useless extension candidates. Maximal degree in co-relation 25710. Up to 3367 conditions per place. [2024-06-28 04:20:29,624 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 74 changer transitions 0/358 dead transitions. [2024-06-28 04:20:29,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 358 transitions, 4937 flow [2024-06-28 04:20:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:20:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:20:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-28 04:20:29,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-28 04:20:29,625 INFO L175 Difference]: Start difference. First operand has 265 places, 320 transitions, 3927 flow. Second operand 12 states and 189 transitions. [2024-06-28 04:20:29,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 358 transitions, 4937 flow [2024-06-28 04:20:30,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 4857 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:20:30,215 INFO L231 Difference]: Finished difference. Result has 271 places, 326 transitions, 4085 flow [2024-06-28 04:20:30,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4085, PETRI_PLACES=271, PETRI_TRANSITIONS=326} [2024-06-28 04:20:30,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-28 04:20:30,216 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 326 transitions, 4085 flow [2024-06-28 04:20:30,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:30,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:30,216 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] [2024-06-28 04:20:30,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:20:30,217 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)] === [2024-06-28 04:20:30,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash -292177256, now seen corresponding path program 6 times [2024-06-28 04:20:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:30,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433049223] [2024-06-28 04:20:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:30,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:33,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433049223] [2024-06-28 04:20:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433049223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:33,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:33,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2849280] [2024-06-28 04:20:33,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:33,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:33,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 326 transitions, 4085 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:35,320 INFO L124 PetriNetUnfolderBase]: 2317/3792 cut-off events. [2024-06-28 04:20:35,321 INFO L125 PetriNetUnfolderBase]: For 227562/227562 co-relation queries the response was YES. [2024-06-28 04:20:35,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26113 conditions, 3792 events. 2317/3792 cut-off events. For 227562/227562 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22415 event pairs, 484 based on Foata normal form. 2/3794 useless extension candidates. Maximal degree in co-relation 25990. Up to 3377 conditions per place. [2024-06-28 04:20:35,364 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 77 changer transitions 0/360 dead transitions. [2024-06-28 04:20:35,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 360 transitions, 5066 flow [2024-06-28 04:20:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:20:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:20:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 04:20:35,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-28 04:20:35,365 INFO L175 Difference]: Start difference. First operand has 271 places, 326 transitions, 4085 flow. Second operand 11 states and 177 transitions. [2024-06-28 04:20:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 360 transitions, 5066 flow [2024-06-28 04:20:35,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 360 transitions, 4961 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 04:20:35,922 INFO L231 Difference]: Finished difference. Result has 274 places, 329 transitions, 4185 flow [2024-06-28 04:20:35,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4185, PETRI_PLACES=274, PETRI_TRANSITIONS=329} [2024-06-28 04:20:35,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-28 04:20:35,923 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 329 transitions, 4185 flow [2024-06-28 04:20:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:35,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:35,923 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] [2024-06-28 04:20:35,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:20:35,923 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)] === [2024-06-28 04:20:35,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1549502786, now seen corresponding path program 7 times [2024-06-28 04:20:35,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:35,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838290] [2024-06-28 04:20:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:39,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:39,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838290] [2024-06-28 04:20:39,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:39,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:39,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:39,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597503491] [2024-06-28 04:20:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:39,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:39,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:39,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 329 transitions, 4185 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:40,794 INFO L124 PetriNetUnfolderBase]: 2311/3784 cut-off events. [2024-06-28 04:20:40,795 INFO L125 PetriNetUnfolderBase]: For 227744/227744 co-relation queries the response was YES. [2024-06-28 04:20:40,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3784 events. 2311/3784 cut-off events. For 227744/227744 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22389 event pairs, 483 based on Foata normal form. 2/3786 useless extension candidates. Maximal degree in co-relation 26025. Up to 3372 conditions per place. [2024-06-28 04:20:40,832 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 77 changer transitions 0/359 dead transitions. [2024-06-28 04:20:40,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 4973 flow [2024-06-28 04:20:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:20:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:20:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-28 04:20:40,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:20:40,834 INFO L175 Difference]: Start difference. First operand has 274 places, 329 transitions, 4185 flow. Second operand 11 states and 176 transitions. [2024-06-28 04:20:40,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 4973 flow [2024-06-28 04:20:41,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 359 transitions, 4773 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-28 04:20:41,525 INFO L231 Difference]: Finished difference. Result has 276 places, 329 transitions, 4145 flow [2024-06-28 04:20:41,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3985, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4145, PETRI_PLACES=276, PETRI_TRANSITIONS=329} [2024-06-28 04:20:41,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 04:20:41,526 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 329 transitions, 4145 flow [2024-06-28 04:20:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:41,527 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, 1] [2024-06-28 04:20:41,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:20:41,527 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)] === [2024-06-28 04:20:41,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash -445805658, now seen corresponding path program 4 times [2024-06-28 04:20:41,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:41,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82427397] [2024-06-28 04:20:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:44,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82427397] [2024-06-28 04:20:44,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82427397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:44,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:44,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:20:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063026211] [2024-06-28 04:20:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:44,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:20:44,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:20:44,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:20:44,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 329 transitions, 4145 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:44,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:44,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:44,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:46,464 INFO L124 PetriNetUnfolderBase]: 2293/3752 cut-off events. [2024-06-28 04:20:46,464 INFO L125 PetriNetUnfolderBase]: For 227260/227260 co-relation queries the response was YES. [2024-06-28 04:20:46,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25385 conditions, 3752 events. 2293/3752 cut-off events. For 227260/227260 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22001 event pairs, 366 based on Foata normal form. 8/3760 useless extension candidates. Maximal degree in co-relation 25259. Up to 3089 conditions per place. [2024-06-28 04:20:46,509 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 64 changer transitions 0/375 dead transitions. [2024-06-28 04:20:46,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 375 transitions, 5059 flow [2024-06-28 04:20:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:20:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:20:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 04:20:46,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-28 04:20:46,511 INFO L175 Difference]: Start difference. First operand has 276 places, 329 transitions, 4145 flow. Second operand 10 states and 174 transitions. [2024-06-28 04:20:46,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 375 transitions, 5059 flow [2024-06-28 04:20:47,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 375 transitions, 4887 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 04:20:47,198 INFO L231 Difference]: Finished difference. Result has 276 places, 329 transitions, 4111 flow [2024-06-28 04:20:47,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4111, PETRI_PLACES=276, PETRI_TRANSITIONS=329} [2024-06-28 04:20:47,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 04:20:47,199 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 329 transitions, 4111 flow [2024-06-28 04:20:47,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:47,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:47,200 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] [2024-06-28 04:20:47,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:20:47,200 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)] === [2024-06-28 04:20:47,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash -321234450, now seen corresponding path program 4 times [2024-06-28 04:20:47,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:47,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232403864] [2024-06-28 04:20:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:47,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:49,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:49,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232403864] [2024-06-28 04:20:49,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232403864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:49,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:49,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:20:49,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769716035] [2024-06-28 04:20:49,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:49,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:20:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:49,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:20:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:20:49,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:49,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 329 transitions, 4111 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) [2024-06-28 04:20:49,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:49,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:49,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:51,267 INFO L124 PetriNetUnfolderBase]: 2314/3791 cut-off events. [2024-06-28 04:20:51,267 INFO L125 PetriNetUnfolderBase]: For 221607/221613 co-relation queries the response was YES. [2024-06-28 04:20:51,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25940 conditions, 3791 events. 2314/3791 cut-off events. For 221607/221613 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22444 event pairs, 499 based on Foata normal form. 8/3799 useless extension candidates. Maximal degree in co-relation 25813. Up to 3405 conditions per place. [2024-06-28 04:20:51,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 300 selfloop transitions, 57 changer transitions 0/362 dead transitions. [2024-06-28 04:20:51,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 362 transitions, 5139 flow [2024-06-28 04:20:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:20:51,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 04:20:51,313 INFO L175 Difference]: Start difference. First operand has 276 places, 329 transitions, 4111 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:20:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 362 transitions, 5139 flow [2024-06-28 04:20:51,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 362 transitions, 5024 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 04:20:51,975 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 4205 flow [2024-06-28 04:20:51,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4205, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-28 04:20:51,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 04:20:51,976 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 4205 flow [2024-06-28 04:20:51,976 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) [2024-06-28 04:20:51,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:51,977 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] [2024-06-28 04:20:51,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:20:51,977 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)] === [2024-06-28 04:20:51,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 813625198, now seen corresponding path program 5 times [2024-06-28 04:20:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:51,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440892450] [2024-06-28 04:20:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:51,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:55,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:55,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440892450] [2024-06-28 04:20:55,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440892450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:55,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:55,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:20:55,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604433822] [2024-06-28 04:20:55,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:20:55,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:55,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:20:55,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:20:55,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:20:55,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 4205 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) [2024-06-28 04:20:55,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:55,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:20:55,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:56,643 INFO L124 PetriNetUnfolderBase]: 2322/3805 cut-off events. [2024-06-28 04:20:56,643 INFO L125 PetriNetUnfolderBase]: For 212310/212316 co-relation queries the response was YES. [2024-06-28 04:20:56,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25866 conditions, 3805 events. 2322/3805 cut-off events. For 212310/212316 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22605 event pairs, 505 based on Foata normal form. 8/3813 useless extension candidates. Maximal degree in co-relation 25739. Up to 3458 conditions per place. [2024-06-28 04:20:56,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 298 selfloop transitions, 55 changer transitions 0/358 dead transitions. [2024-06-28 04:20:56,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 358 transitions, 5023 flow [2024-06-28 04:20:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:20:56,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 04:20:56,704 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 4205 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:20:56,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 358 transitions, 5023 flow [2024-06-28 04:20:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 358 transitions, 4886 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:57,328 INFO L231 Difference]: Finished difference. Result has 280 places, 335 transitions, 4231 flow [2024-06-28 04:20:57,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4231, PETRI_PLACES=280, PETRI_TRANSITIONS=335} [2024-06-28 04:20:57,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-28 04:20:57,328 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 335 transitions, 4231 flow [2024-06-28 04:20:57,329 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) [2024-06-28 04:20:57,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:57,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:57,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:20:57,329 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)] === [2024-06-28 04:20:57,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1598321102, now seen corresponding path program 8 times [2024-06-28 04:20:57,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:57,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881665770] [2024-06-28 04:20:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881665770] [2024-06-28 04:21:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881665770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:00,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818542051] [2024-06-28 04:21:00,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:00,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:00,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:00,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:00,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 335 transitions, 4231 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:00,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:00,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:00,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:02,168 INFO L124 PetriNetUnfolderBase]: 2332/3813 cut-off events. [2024-06-28 04:21:02,168 INFO L125 PetriNetUnfolderBase]: For 216836/216836 co-relation queries the response was YES. [2024-06-28 04:21:02,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26020 conditions, 3813 events. 2332/3813 cut-off events. For 216836/216836 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22575 event pairs, 517 based on Foata normal form. 2/3814 useless extension candidates. Maximal degree in co-relation 25891. Up to 3311 conditions per place. [2024-06-28 04:21:02,207 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 107 changer transitions 0/371 dead transitions. [2024-06-28 04:21:02,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 371 transitions, 5253 flow [2024-06-28 04:21:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:21:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:21:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 04:21:02,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-28 04:21:02,209 INFO L175 Difference]: Start difference. First operand has 280 places, 335 transitions, 4231 flow. Second operand 11 states and 178 transitions. [2024-06-28 04:21:02,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 371 transitions, 5253 flow [2024-06-28 04:21:02,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 371 transitions, 5130 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:02,908 INFO L231 Difference]: Finished difference. Result has 285 places, 338 transitions, 4378 flow [2024-06-28 04:21:02,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4378, PETRI_PLACES=285, PETRI_TRANSITIONS=338} [2024-06-28 04:21:02,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-28 04:21:02,909 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 338 transitions, 4378 flow [2024-06-28 04:21:02,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:02,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:02,909 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] [2024-06-28 04:21:02,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:21:02,909 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)] === [2024-06-28 04:21:02,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1606652972, now seen corresponding path program 9 times [2024-06-28 04:21:02,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:02,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181502885] [2024-06-28 04:21:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:06,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:06,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181502885] [2024-06-28 04:21:06,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181502885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:06,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802488968] [2024-06-28 04:21:06,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:06,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:06,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:06,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:06,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:06,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:06,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 338 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:06,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:06,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:06,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:07,907 INFO L124 PetriNetUnfolderBase]: 2358/3857 cut-off events. [2024-06-28 04:21:07,908 INFO L125 PetriNetUnfolderBase]: For 228283/228283 co-relation queries the response was YES. [2024-06-28 04:21:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26644 conditions, 3857 events. 2358/3857 cut-off events. For 228283/228283 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22920 event pairs, 519 based on Foata normal form. 2/3858 useless extension candidates. Maximal degree in co-relation 26514. Up to 3336 conditions per place. [2024-06-28 04:21:07,964 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 109 changer transitions 0/377 dead transitions. [2024-06-28 04:21:07,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 377 transitions, 5624 flow [2024-06-28 04:21:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:21:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:21:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-28 04:21:07,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2024-06-28 04:21:07,966 INFO L175 Difference]: Start difference. First operand has 285 places, 338 transitions, 4378 flow. Second operand 12 states and 191 transitions. [2024-06-28 04:21:07,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 377 transitions, 5624 flow [2024-06-28 04:21:08,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 377 transitions, 5288 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-28 04:21:08,713 INFO L231 Difference]: Finished difference. Result has 288 places, 344 transitions, 4378 flow [2024-06-28 04:21:08,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4082, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4378, PETRI_PLACES=288, PETRI_TRANSITIONS=344} [2024-06-28 04:21:08,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-28 04:21:08,713 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 344 transitions, 4378 flow [2024-06-28 04:21:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:08,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:08,714 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] [2024-06-28 04:21:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:21:08,714 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)] === [2024-06-28 04:21:08,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash -321111752, now seen corresponding path program 10 times [2024-06-28 04:21:08,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:08,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386577608] [2024-06-28 04:21:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:08,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:11,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386577608] [2024-06-28 04:21:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386577608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:11,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:11,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:11,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629488840] [2024-06-28 04:21:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:11,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:11,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:11,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:11,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 344 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:11,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:11,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:11,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:13,388 INFO L124 PetriNetUnfolderBase]: 2352/3853 cut-off events. [2024-06-28 04:21:13,388 INFO L125 PetriNetUnfolderBase]: For 226579/226579 co-relation queries the response was YES. [2024-06-28 04:21:13,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26354 conditions, 3853 events. 2352/3853 cut-off events. For 226579/226579 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22969 event pairs, 521 based on Foata normal form. 2/3854 useless extension candidates. Maximal degree in co-relation 26223. Up to 3331 conditions per place. [2024-06-28 04:21:13,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 260 selfloop transitions, 108 changer transitions 0/373 dead transitions. [2024-06-28 04:21:13,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 373 transitions, 5348 flow [2024-06-28 04:21:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:21:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:21:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:21:13,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:21:13,431 INFO L175 Difference]: Start difference. First operand has 288 places, 344 transitions, 4378 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:21:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 373 transitions, 5348 flow [2024-06-28 04:21:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 373 transitions, 5101 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-28 04:21:14,217 INFO L231 Difference]: Finished difference. Result has 290 places, 344 transitions, 4353 flow [2024-06-28 04:21:14,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4353, PETRI_PLACES=290, PETRI_TRANSITIONS=344} [2024-06-28 04:21:14,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-28 04:21:14,218 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 344 transitions, 4353 flow [2024-06-28 04:21:14,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:14,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:14,218 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] [2024-06-28 04:21:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:21:14,219 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)] === [2024-06-28 04:21:14,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 654809880, now seen corresponding path program 6 times [2024-06-28 04:21:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86065700] [2024-06-28 04:21:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86065700] [2024-06-28 04:21:16,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86065700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:16,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353465159] [2024-06-28 04:21:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:16,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:16,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:16,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:16,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 344 transitions, 4353 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) [2024-06-28 04:21:16,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:16,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:18,585 INFO L124 PetriNetUnfolderBase]: 2360/3871 cut-off events. [2024-06-28 04:21:18,586 INFO L125 PetriNetUnfolderBase]: For 231837/231843 co-relation queries the response was YES. [2024-06-28 04:21:18,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 3871 events. 2360/3871 cut-off events. For 231837/231843 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23056 event pairs, 412 based on Foata normal form. 8/3879 useless extension candidates. Maximal degree in co-relation 26337. Up to 3289 conditions per place. [2024-06-28 04:21:18,631 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 78 changer transitions 0/379 dead transitions. [2024-06-28 04:21:18,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 379 transitions, 5583 flow [2024-06-28 04:21:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:21:18,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 04:21:18,632 INFO L175 Difference]: Start difference. First operand has 290 places, 344 transitions, 4353 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:21:18,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 379 transitions, 5583 flow [2024-06-28 04:21:19,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 379 transitions, 5367 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 04:21:19,521 INFO L231 Difference]: Finished difference. Result has 289 places, 348 transitions, 4390 flow [2024-06-28 04:21:19,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4390, PETRI_PLACES=289, PETRI_TRANSITIONS=348} [2024-06-28 04:21:19,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-28 04:21:19,522 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 348 transitions, 4390 flow [2024-06-28 04:21:19,522 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) [2024-06-28 04:21:19,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:19,523 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] [2024-06-28 04:21:19,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:21:19,523 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)] === [2024-06-28 04:21:19,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1581996212, now seen corresponding path program 7 times [2024-06-28 04:21:19,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:19,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585438472] [2024-06-28 04:21:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:22,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585438472] [2024-06-28 04:21:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585438472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:22,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122681410] [2024-06-28 04:21:22,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:22,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:22,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:22,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:22,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 348 transitions, 4390 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) [2024-06-28 04:21:22,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:22,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:22,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:23,538 INFO L124 PetriNetUnfolderBase]: 2368/3883 cut-off events. [2024-06-28 04:21:23,539 INFO L125 PetriNetUnfolderBase]: For 237910/237916 co-relation queries the response was YES. [2024-06-28 04:21:23,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26739 conditions, 3883 events. 2368/3883 cut-off events. For 237910/237916 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23140 event pairs, 415 based on Foata normal form. 8/3891 useless extension candidates. Maximal degree in co-relation 26606. Up to 3297 conditions per place. [2024-06-28 04:21:23,586 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 290 selfloop transitions, 81 changer transitions 0/376 dead transitions. [2024-06-28 04:21:23,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 376 transitions, 5408 flow [2024-06-28 04:21:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:21:23,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-28 04:21:23,588 INFO L175 Difference]: Start difference. First operand has 289 places, 348 transitions, 4390 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:21:23,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 376 transitions, 5408 flow [2024-06-28 04:21:24,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 376 transitions, 5113 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 04:21:24,624 INFO L231 Difference]: Finished difference. Result has 290 places, 350 transitions, 4310 flow [2024-06-28 04:21:24,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=290, PETRI_TRANSITIONS=350} [2024-06-28 04:21:24,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-28 04:21:24,625 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 350 transitions, 4310 flow [2024-06-28 04:21:24,625 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) [2024-06-28 04:21:24,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:24,625 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] [2024-06-28 04:21:24,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:21:24,626 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)] === [2024-06-28 04:21:24,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:24,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1211268554, now seen corresponding path program 8 times [2024-06-28 04:21:24,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:24,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663573028] [2024-06-28 04:21:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:24,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:27,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:27,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663573028] [2024-06-28 04:21:27,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663573028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:27,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:27,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:27,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116866491] [2024-06-28 04:21:27,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:27,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:27,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:27,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 350 transitions, 4310 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) [2024-06-28 04:21:27,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:27,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:27,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:29,187 INFO L124 PetriNetUnfolderBase]: 2376/3891 cut-off events. [2024-06-28 04:21:29,187 INFO L125 PetriNetUnfolderBase]: For 241270/241276 co-relation queries the response was YES. [2024-06-28 04:21:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26396 conditions, 3891 events. 2376/3891 cut-off events. For 241270/241276 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23185 event pairs, 513 based on Foata normal form. 8/3899 useless extension candidates. Maximal degree in co-relation 26264. Up to 3536 conditions per place. [2024-06-28 04:21:29,227 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 309 selfloop transitions, 57 changer transitions 0/371 dead transitions. [2024-06-28 04:21:29,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 371 transitions, 5128 flow [2024-06-28 04:21:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 04:21:29,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 04:21:29,228 INFO L175 Difference]: Start difference. First operand has 290 places, 350 transitions, 4310 flow. Second operand 8 states and 127 transitions. [2024-06-28 04:21:29,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 371 transitions, 5128 flow [2024-06-28 04:21:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 371 transitions, 4988 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:30,131 INFO L231 Difference]: Finished difference. Result has 293 places, 352 transitions, 4325 flow [2024-06-28 04:21:30,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4325, PETRI_PLACES=293, PETRI_TRANSITIONS=352} [2024-06-28 04:21:30,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-28 04:21:30,131 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 352 transitions, 4325 flow [2024-06-28 04:21:30,131 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) [2024-06-28 04:21:30,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:30,132 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] [2024-06-28 04:21:30,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:21:30,132 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)] === [2024-06-28 04:21:30,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1163542348, now seen corresponding path program 9 times [2024-06-28 04:21:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:30,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288549715] [2024-06-28 04:21:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288549715] [2024-06-28 04:21:32,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288549715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:32,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:32,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760054138] [2024-06-28 04:21:32,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:32,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:32,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 352 transitions, 4325 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) [2024-06-28 04:21:32,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:32,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:32,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:34,170 INFO L124 PetriNetUnfolderBase]: 2384/3907 cut-off events. [2024-06-28 04:21:34,171 INFO L125 PetriNetUnfolderBase]: For 246606/246612 co-relation queries the response was YES. [2024-06-28 04:21:34,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26409 conditions, 3907 events. 2384/3907 cut-off events. For 246606/246612 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23391 event pairs, 513 based on Foata normal form. 8/3915 useless extension candidates. Maximal degree in co-relation 26276. Up to 3522 conditions per place. [2024-06-28 04:21:34,217 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 64 changer transitions 0/374 dead transitions. [2024-06-28 04:21:34,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 374 transitions, 5145 flow [2024-06-28 04:21:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 04:21:34,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:21:34,218 INFO L175 Difference]: Start difference. First operand has 293 places, 352 transitions, 4325 flow. Second operand 8 states and 128 transitions. [2024-06-28 04:21:34,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 374 transitions, 5145 flow [2024-06-28 04:21:35,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 374 transitions, 5014 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:35,140 INFO L231 Difference]: Finished difference. Result has 295 places, 354 transitions, 4357 flow [2024-06-28 04:21:35,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4357, PETRI_PLACES=295, PETRI_TRANSITIONS=354} [2024-06-28 04:21:35,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-28 04:21:35,141 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 354 transitions, 4357 flow [2024-06-28 04:21:35,141 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) [2024-06-28 04:21:35,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:35,141 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] [2024-06-28 04:21:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:21:35,141 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)] === [2024-06-28 04:21:35,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1167892826, now seen corresponding path program 11 times [2024-06-28 04:21:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:35,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157415281] [2024-06-28 04:21:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:38,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157415281] [2024-06-28 04:21:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157415281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:38,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:38,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441335001] [2024-06-28 04:21:38,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:38,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:38,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 354 transitions, 4357 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:38,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:38,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:38,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:39,903 INFO L124 PetriNetUnfolderBase]: 2410/3945 cut-off events. [2024-06-28 04:21:39,903 INFO L125 PetriNetUnfolderBase]: For 259222/259222 co-relation queries the response was YES. [2024-06-28 04:21:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26910 conditions, 3945 events. 2410/3945 cut-off events. For 259222/259222 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23573 event pairs, 496 based on Foata normal form. 2/3946 useless extension candidates. Maximal degree in co-relation 26776. Up to 3103 conditions per place. [2024-06-28 04:21:39,951 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 201 changer transitions 0/389 dead transitions. [2024-06-28 04:21:39,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 389 transitions, 5692 flow [2024-06-28 04:21:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:21:39,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:21:39,953 INFO L175 Difference]: Start difference. First operand has 295 places, 354 transitions, 4357 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:21:39,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 389 transitions, 5692 flow [2024-06-28 04:21:41,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 389 transitions, 5551 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 04:21:41,048 INFO L231 Difference]: Finished difference. Result has 298 places, 363 transitions, 4805 flow [2024-06-28 04:21:41,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4805, PETRI_PLACES=298, PETRI_TRANSITIONS=363} [2024-06-28 04:21:41,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-28 04:21:41,049 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 363 transitions, 4805 flow [2024-06-28 04:21:41,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:41,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:41,049 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] [2024-06-28 04:21:41,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:21:41,049 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)] === [2024-06-28 04:21:41,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:41,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1899651396, now seen corresponding path program 12 times [2024-06-28 04:21:41,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:41,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480309765] [2024-06-28 04:21:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:41,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:44,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:44,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480309765] [2024-06-28 04:21:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480309765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:44,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:44,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:44,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296428500] [2024-06-28 04:21:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:44,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:44,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:44,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:44,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:44,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 363 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:44,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:44,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:44,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:45,669 INFO L124 PetriNetUnfolderBase]: 2420/3959 cut-off events. [2024-06-28 04:21:45,669 INFO L125 PetriNetUnfolderBase]: For 269493/269493 co-relation queries the response was YES. [2024-06-28 04:21:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27838 conditions, 3959 events. 2420/3959 cut-off events. For 269493/269493 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23693 event pairs, 532 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 27703. Up to 3463 conditions per place. [2024-06-28 04:21:45,712 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 102 changer transitions 0/388 dead transitions. [2024-06-28 04:21:45,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 388 transitions, 5840 flow [2024-06-28 04:21:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:21:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:21:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:21:45,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:21:45,714 INFO L175 Difference]: Start difference. First operand has 298 places, 363 transitions, 4805 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:21:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 388 transitions, 5840 flow [2024-06-28 04:21:46,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 388 transitions, 5680 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:46,718 INFO L231 Difference]: Finished difference. Result has 303 places, 366 transitions, 4900 flow [2024-06-28 04:21:46,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4900, PETRI_PLACES=303, PETRI_TRANSITIONS=366} [2024-06-28 04:21:46,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-28 04:21:46,719 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 366 transitions, 4900 flow [2024-06-28 04:21:46,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:46,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:46,719 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] [2024-06-28 04:21:46,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:21:46,719 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)] === [2024-06-28 04:21:46,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash -255410182, now seen corresponding path program 13 times [2024-06-28 04:21:46,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:46,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797820213] [2024-06-28 04:21:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:46,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797820213] [2024-06-28 04:21:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797820213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:49,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:49,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:21:49,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138898550] [2024-06-28 04:21:49,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:21:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:21:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:21:49,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:49,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 366 transitions, 4900 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:49,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:49,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:49,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:51,427 INFO L124 PetriNetUnfolderBase]: 2414/3951 cut-off events. [2024-06-28 04:21:51,428 INFO L125 PetriNetUnfolderBase]: For 262376/262376 co-relation queries the response was YES. [2024-06-28 04:21:51,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27150 conditions, 3951 events. 2414/3951 cut-off events. For 262376/262376 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23648 event pairs, 531 based on Foata normal form. 2/3952 useless extension candidates. Maximal degree in co-relation 27013. Up to 3458 conditions per place. [2024-06-28 04:21:51,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 103 changer transitions 0/390 dead transitions. [2024-06-28 04:21:51,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 390 transitions, 5734 flow [2024-06-28 04:21:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:21:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:21:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-28 04:21:51,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-28 04:21:51,479 INFO L175 Difference]: Start difference. First operand has 303 places, 366 transitions, 4900 flow. Second operand 11 states and 169 transitions. [2024-06-28 04:21:51,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 390 transitions, 5734 flow [2024-06-28 04:21:52,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 390 transitions, 5448 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 04:21:52,588 INFO L231 Difference]: Finished difference. Result has 307 places, 366 transitions, 4826 flow [2024-06-28 04:21:52,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4826, PETRI_PLACES=307, PETRI_TRANSITIONS=366} [2024-06-28 04:21:52,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-28 04:21:52,589 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 366 transitions, 4826 flow [2024-06-28 04:21:52,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:52,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:52,589 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] [2024-06-28 04:21:52,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:21:52,589 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)] === [2024-06-28 04:21:52,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:52,590 INFO L85 PathProgramCache]: Analyzing trace with hash 754121134, now seen corresponding path program 10 times [2024-06-28 04:21:52,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:52,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919085579] [2024-06-28 04:21:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:55,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919085579] [2024-06-28 04:21:55,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919085579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:55,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:55,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409850441] [2024-06-28 04:21:55,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:55,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:55,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:21:55,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 366 transitions, 4826 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) [2024-06-28 04:21:55,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:55,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:21:55,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:56,370 INFO L124 PetriNetUnfolderBase]: 2409/3938 cut-off events. [2024-06-28 04:21:56,370 INFO L125 PetriNetUnfolderBase]: For 260357/260357 co-relation queries the response was YES. [2024-06-28 04:21:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26917 conditions, 3938 events. 2409/3938 cut-off events. For 260357/260357 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23530 event pairs, 524 based on Foata normal form. 2/3939 useless extension candidates. Maximal degree in co-relation 26779. Up to 3520 conditions per place. [2024-06-28 04:21:56,423 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 65 changer transitions 0/392 dead transitions. [2024-06-28 04:21:56,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 392 transitions, 5678 flow [2024-06-28 04:21:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:21:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:21:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 04:21:56,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:21:56,425 INFO L175 Difference]: Start difference. First operand has 307 places, 366 transitions, 4826 flow. Second operand 7 states and 126 transitions. [2024-06-28 04:21:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 392 transitions, 5678 flow [2024-06-28 04:21:57,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 392 transitions, 5454 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 04:21:57,568 INFO L231 Difference]: Finished difference. Result has 304 places, 366 transitions, 4741 flow [2024-06-28 04:21:57,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4741, PETRI_PLACES=304, PETRI_TRANSITIONS=366} [2024-06-28 04:21:57,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-28 04:21:57,569 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 366 transitions, 4741 flow [2024-06-28 04:21:57,569 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) [2024-06-28 04:21:57,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:57,569 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] [2024-06-28 04:21:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:21:57,569 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)] === [2024-06-28 04:21:57,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 761739694, now seen corresponding path program 11 times [2024-06-28 04:21:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:57,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212918553] [2024-06-28 04:21:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:00,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212918553] [2024-06-28 04:22:00,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212918553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:00,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:00,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296052641] [2024-06-28 04:22:00,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:00,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:00,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:00,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:00,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 366 transitions, 4741 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) [2024-06-28 04:22:00,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:00,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:00,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:01,409 INFO L124 PetriNetUnfolderBase]: 2404/3933 cut-off events. [2024-06-28 04:22:01,410 INFO L125 PetriNetUnfolderBase]: For 258294/258294 co-relation queries the response was YES. [2024-06-28 04:22:01,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26702 conditions, 3933 events. 2404/3933 cut-off events. For 258294/258294 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23430 event pairs, 414 based on Foata normal form. 2/3934 useless extension candidates. Maximal degree in co-relation 26563. Up to 3210 conditions per place. [2024-06-28 04:22:01,452 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 82 changer transitions 0/397 dead transitions. [2024-06-28 04:22:01,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 397 transitions, 5823 flow [2024-06-28 04:22:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:22:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:22:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 04:22:01,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 04:22:01,454 INFO L175 Difference]: Start difference. First operand has 304 places, 366 transitions, 4741 flow. Second operand 7 states and 131 transitions. [2024-06-28 04:22:01,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 397 transitions, 5823 flow [2024-06-28 04:22:02,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 397 transitions, 5665 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:02,493 INFO L231 Difference]: Finished difference. Result has 305 places, 366 transitions, 4755 flow [2024-06-28 04:22:02,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4755, PETRI_PLACES=305, PETRI_TRANSITIONS=366} [2024-06-28 04:22:02,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-28 04:22:02,494 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 366 transitions, 4755 flow [2024-06-28 04:22:02,494 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) [2024-06-28 04:22:02,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:02,494 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] [2024-06-28 04:22:02,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:22:02,494 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)] === [2024-06-28 04:22:02,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash -441988690, now seen corresponding path program 12 times [2024-06-28 04:22:02,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:02,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763087380] [2024-06-28 04:22:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763087380] [2024-06-28 04:22:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763087380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:05,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:05,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:22:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149166152] [2024-06-28 04:22:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:05,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:22:05,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:22:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:22:05,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:05,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 366 transitions, 4755 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) [2024-06-28 04:22:05,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:05,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:05,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:07,209 INFO L124 PetriNetUnfolderBase]: 2399/3928 cut-off events. [2024-06-28 04:22:07,210 INFO L125 PetriNetUnfolderBase]: For 256608/256608 co-relation queries the response was YES. [2024-06-28 04:22:07,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26665 conditions, 3928 events. 2399/3928 cut-off events. For 256608/256608 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23494 event pairs, 499 based on Foata normal form. 2/3930 useless extension candidates. Maximal degree in co-relation 26525. Up to 3302 conditions per place. [2024-06-28 04:22:07,261 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 74 changer transitions 0/409 dead transitions. [2024-06-28 04:22:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 409 transitions, 5729 flow [2024-06-28 04:22:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:22:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:22:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 04:22:07,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-28 04:22:07,262 INFO L175 Difference]: Start difference. First operand has 305 places, 366 transitions, 4755 flow. Second operand 9 states and 165 transitions. [2024-06-28 04:22:07,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 409 transitions, 5729 flow [2024-06-28 04:22:08,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 409 transitions, 5525 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 04:22:08,281 INFO L231 Difference]: Finished difference. Result has 308 places, 366 transitions, 4723 flow [2024-06-28 04:22:08,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4723, PETRI_PLACES=308, PETRI_TRANSITIONS=366} [2024-06-28 04:22:08,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-28 04:22:08,282 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 366 transitions, 4723 flow [2024-06-28 04:22:08,282 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) [2024-06-28 04:22:08,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:08,282 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] [2024-06-28 04:22:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:22:08,283 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)] === [2024-06-28 04:22:08,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1645488930, now seen corresponding path program 14 times [2024-06-28 04:22:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:08,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144011031] [2024-06-28 04:22:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:11,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144011031] [2024-06-28 04:22:11,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144011031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:11,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:11,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:11,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032730297] [2024-06-28 04:22:11,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:11,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:11,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:11,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:11,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 366 transitions, 4723 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:11,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:11,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:11,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:12,706 INFO L124 PetriNetUnfolderBase]: 2441/3996 cut-off events. [2024-06-28 04:22:12,706 INFO L125 PetriNetUnfolderBase]: For 278575/278575 co-relation queries the response was YES. [2024-06-28 04:22:12,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27580 conditions, 3996 events. 2441/3996 cut-off events. For 278575/278575 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23939 event pairs, 483 based on Foata normal form. 2/3997 useless extension candidates. Maximal degree in co-relation 27439. Up to 3263 conditions per place. [2024-06-28 04:22:12,753 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 162 changer transitions 0/402 dead transitions. [2024-06-28 04:22:12,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 402 transitions, 6126 flow [2024-06-28 04:22:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:22:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:22:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:22:12,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:22:12,754 INFO L175 Difference]: Start difference. First operand has 308 places, 366 transitions, 4723 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:22:12,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 402 transitions, 6126 flow [2024-06-28 04:22:13,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 402 transitions, 5944 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 04:22:13,913 INFO L231 Difference]: Finished difference. Result has 309 places, 375 transitions, 5070 flow [2024-06-28 04:22:13,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5070, PETRI_PLACES=309, PETRI_TRANSITIONS=375} [2024-06-28 04:22:13,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-28 04:22:13,914 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 375 transitions, 5070 flow [2024-06-28 04:22:13,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:13,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:13,914 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] [2024-06-28 04:22:13,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:22:13,914 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)] === [2024-06-28 04:22:13,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash -435674982, now seen corresponding path program 15 times [2024-06-28 04:22:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:13,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109878379] [2024-06-28 04:22:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:17,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109878379] [2024-06-28 04:22:17,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109878379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:17,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:17,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:17,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857939309] [2024-06-28 04:22:17,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:17,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:17,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:17,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 375 transitions, 5070 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:17,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:17,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:17,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:18,643 INFO L124 PetriNetUnfolderBase]: 2435/3988 cut-off events. [2024-06-28 04:22:18,643 INFO L125 PetriNetUnfolderBase]: For 267117/267117 co-relation queries the response was YES. [2024-06-28 04:22:18,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27464 conditions, 3988 events. 2435/3988 cut-off events. For 267117/267117 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 23880 event pairs, 494 based on Foata normal form. 2/3990 useless extension candidates. Maximal degree in co-relation 27323. Up to 3607 conditions per place. [2024-06-28 04:22:18,693 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 51 changer transitions 0/400 dead transitions. [2024-06-28 04:22:18,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 400 transitions, 5930 flow [2024-06-28 04:22:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:22:18,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 04:22:18,694 INFO L175 Difference]: Start difference. First operand has 309 places, 375 transitions, 5070 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:22:18,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 400 transitions, 5930 flow [2024-06-28 04:22:19,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 400 transitions, 5466 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:19,749 INFO L231 Difference]: Finished difference. Result has 310 places, 375 transitions, 4718 flow [2024-06-28 04:22:19,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4718, PETRI_PLACES=310, PETRI_TRANSITIONS=375} [2024-06-28 04:22:19,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-28 04:22:19,749 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 375 transitions, 4718 flow [2024-06-28 04:22:19,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:19,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:19,750 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] [2024-06-28 04:22:19,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:22:19,750 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)] === [2024-06-28 04:22:19,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1822620450, now seen corresponding path program 16 times [2024-06-28 04:22:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058476162] [2024-06-28 04:22:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:22,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058476162] [2024-06-28 04:22:22,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058476162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:22,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:22,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771055277] [2024-06-28 04:22:22,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:22,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:22,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:22,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:22,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 375 transitions, 4718 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:22,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:22,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:22,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:24,639 INFO L124 PetriNetUnfolderBase]: 2429/3984 cut-off events. [2024-06-28 04:22:24,640 INFO L125 PetriNetUnfolderBase]: For 260795/260795 co-relation queries the response was YES. [2024-06-28 04:22:24,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26720 conditions, 3984 events. 2429/3984 cut-off events. For 260795/260795 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23908 event pairs, 476 based on Foata normal form. 2/3985 useless extension candidates. Maximal degree in co-relation 26578. Up to 3253 conditions per place. [2024-06-28 04:22:24,687 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 164 changer transitions 0/404 dead transitions. [2024-06-28 04:22:24,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 404 transitions, 5938 flow [2024-06-28 04:22:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:22:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:22:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-28 04:22:24,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-28 04:22:24,689 INFO L175 Difference]: Start difference. First operand has 310 places, 375 transitions, 4718 flow. Second operand 11 states and 179 transitions. [2024-06-28 04:22:24,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 404 transitions, 5938 flow [2024-06-28 04:22:25,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 404 transitions, 5645 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 04:22:25,864 INFO L231 Difference]: Finished difference. Result has 312 places, 375 transitions, 4759 flow [2024-06-28 04:22:25,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4759, PETRI_PLACES=312, PETRI_TRANSITIONS=375} [2024-06-28 04:22:25,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-28 04:22:25,864 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 375 transitions, 4759 flow [2024-06-28 04:22:25,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:25,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:25,865 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] [2024-06-28 04:22:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:22:25,865 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)] === [2024-06-28 04:22:25,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash 754125722, now seen corresponding path program 17 times [2024-06-28 04:22:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:25,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476403779] [2024-06-28 04:22:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:29,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:29,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476403779] [2024-06-28 04:22:29,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476403779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:29,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:29,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163135040] [2024-06-28 04:22:29,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:29,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:29,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:29,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:29,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 375 transitions, 4759 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:29,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:29,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:29,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:30,843 INFO L124 PetriNetUnfolderBase]: 2439/3992 cut-off events. [2024-06-28 04:22:30,844 INFO L125 PetriNetUnfolderBase]: For 266842/266842 co-relation queries the response was YES. [2024-06-28 04:22:30,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27004 conditions, 3992 events. 2439/3992 cut-off events. For 266842/266842 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23938 event pairs, 532 based on Foata normal form. 2/3993 useless extension candidates. Maximal degree in co-relation 26862. Up to 3526 conditions per place. [2024-06-28 04:22:30,886 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 77 changer transitions 0/404 dead transitions. [2024-06-28 04:22:30,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 404 transitions, 5860 flow [2024-06-28 04:22:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:22:30,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 04:22:30,888 INFO L175 Difference]: Start difference. First operand has 312 places, 375 transitions, 4759 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:22:30,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 404 transitions, 5860 flow [2024-06-28 04:22:32,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 404 transitions, 5416 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-28 04:22:32,194 INFO L231 Difference]: Finished difference. Result has 312 places, 378 transitions, 4526 flow [2024-06-28 04:22:32,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4526, PETRI_PLACES=312, PETRI_TRANSITIONS=378} [2024-06-28 04:22:32,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-28 04:22:32,194 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 378 transitions, 4526 flow [2024-06-28 04:22:32,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:32,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:32,195 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] [2024-06-28 04:22:32,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:22:32,195 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)] === [2024-06-28 04:22:32,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 754115492, now seen corresponding path program 18 times [2024-06-28 04:22:32,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:32,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591721443] [2024-06-28 04:22:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:32,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:35,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:35,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591721443] [2024-06-28 04:22:35,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591721443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:35,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:35,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991230710] [2024-06-28 04:22:35,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:35,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:35,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:35,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:35,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 378 transitions, 4526 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:35,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:35,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:35,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:36,953 INFO L124 PetriNetUnfolderBase]: 2433/3986 cut-off events. [2024-06-28 04:22:36,953 INFO L125 PetriNetUnfolderBase]: For 263583/263583 co-relation queries the response was YES. [2024-06-28 04:22:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26041 conditions, 3986 events. 2433/3986 cut-off events. For 263583/263583 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23915 event pairs, 531 based on Foata normal form. 2/3987 useless extension candidates. Maximal degree in co-relation 25899. Up to 3521 conditions per place. [2024-06-28 04:22:37,006 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 80 changer transitions 0/409 dead transitions. [2024-06-28 04:22:37,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 409 transitions, 5422 flow [2024-06-28 04:22:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:22:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:22:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:22:37,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 04:22:37,008 INFO L175 Difference]: Start difference. First operand has 312 places, 378 transitions, 4526 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:22:37,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 409 transitions, 5422 flow [2024-06-28 04:22:38,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 409 transitions, 5140 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 04:22:38,285 INFO L231 Difference]: Finished difference. Result has 315 places, 378 transitions, 4410 flow [2024-06-28 04:22:38,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4410, PETRI_PLACES=315, PETRI_TRANSITIONS=378} [2024-06-28 04:22:38,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-28 04:22:38,286 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 378 transitions, 4410 flow [2024-06-28 04:22:38,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:38,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:38,286 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] [2024-06-28 04:22:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:22:38,286 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)] === [2024-06-28 04:22:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 766090172, now seen corresponding path program 19 times [2024-06-28 04:22:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:38,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516278221] [2024-06-28 04:22:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:41,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:41,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516278221] [2024-06-28 04:22:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516278221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:41,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:41,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:41,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369655201] [2024-06-28 04:22:41,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:41,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:41,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:41,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:41,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 378 transitions, 4410 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:41,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:41,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:41,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:43,028 INFO L124 PetriNetUnfolderBase]: 2427/3978 cut-off events. [2024-06-28 04:22:43,029 INFO L125 PetriNetUnfolderBase]: For 259528/259528 co-relation queries the response was YES. [2024-06-28 04:22:43,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25758 conditions, 3978 events. 2427/3978 cut-off events. For 259528/259528 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23935 event pairs, 497 based on Foata normal form. 2/3979 useless extension candidates. Maximal degree in co-relation 25615. Up to 3253 conditions per place. [2024-06-28 04:22:43,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 159 changer transitions 0/403 dead transitions. [2024-06-28 04:22:43,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 403 transitions, 5632 flow [2024-06-28 04:22:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:22:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:22:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:22:43,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 04:22:43,080 INFO L175 Difference]: Start difference. First operand has 315 places, 378 transitions, 4410 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:22:43,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 403 transitions, 5632 flow [2024-06-28 04:22:44,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 403 transitions, 5420 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-28 04:22:44,455 INFO L231 Difference]: Finished difference. Result has 313 places, 378 transitions, 4522 flow [2024-06-28 04:22:44,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4522, PETRI_PLACES=313, PETRI_TRANSITIONS=378} [2024-06-28 04:22:44,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-28 04:22:44,455 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 378 transitions, 4522 flow [2024-06-28 04:22:44,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:44,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:44,456 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] [2024-06-28 04:22:44,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:22:44,456 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)] === [2024-06-28 04:22:44,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash -435555012, now seen corresponding path program 20 times [2024-06-28 04:22:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:44,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786208972] [2024-06-28 04:22:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:44,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786208972] [2024-06-28 04:22:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786208972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:47,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:47,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102891827] [2024-06-28 04:22:47,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:47,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:47,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:47,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 378 transitions, 4522 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:47,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:47,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:47,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:49,212 INFO L124 PetriNetUnfolderBase]: 2421/3978 cut-off events. [2024-06-28 04:22:49,213 INFO L125 PetriNetUnfolderBase]: For 256993/256993 co-relation queries the response was YES. [2024-06-28 04:22:49,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25807 conditions, 3978 events. 2421/3978 cut-off events. For 256993/256993 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23993 event pairs, 490 based on Foata normal form. 2/3980 useless extension candidates. Maximal degree in co-relation 25663. Up to 3340 conditions per place. [2024-06-28 04:22:49,265 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 140 changer transitions 0/414 dead transitions. [2024-06-28 04:22:49,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 414 transitions, 5622 flow [2024-06-28 04:22:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:22:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:22:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 04:22:49,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-28 04:22:49,267 INFO L175 Difference]: Start difference. First operand has 313 places, 378 transitions, 4522 flow. Second operand 10 states and 171 transitions. [2024-06-28 04:22:49,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 414 transitions, 5622 flow [2024-06-28 04:22:50,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 414 transitions, 5157 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-28 04:22:50,450 INFO L231 Difference]: Finished difference. Result has 315 places, 378 transitions, 4347 flow [2024-06-28 04:22:50,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4347, PETRI_PLACES=315, PETRI_TRANSITIONS=378} [2024-06-28 04:22:50,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-28 04:22:50,451 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 378 transitions, 4347 flow [2024-06-28 04:22:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:50,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:50,451 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] [2024-06-28 04:22:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:22:50,451 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)] === [2024-06-28 04:22:50,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -929035088, now seen corresponding path program 21 times [2024-06-28 04:22:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:50,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577112686] [2024-06-28 04:22:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:50,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:22:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:22:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:22:53,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577112686] [2024-06-28 04:22:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577112686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:22:53,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:22:53,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:22:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043130609] [2024-06-28 04:22:53,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:22:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:22:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:22:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:22:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:22:53,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:22:53,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 378 transitions, 4347 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:53,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:22:53,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:22:53,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:22:55,461 INFO L124 PetriNetUnfolderBase]: 2431/3992 cut-off events. [2024-06-28 04:22:55,461 INFO L125 PetriNetUnfolderBase]: For 261813/261813 co-relation queries the response was YES. [2024-06-28 04:22:55,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25531 conditions, 3992 events. 2431/3992 cut-off events. For 261813/261813 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24038 event pairs, 486 based on Foata normal form. 2/3994 useless extension candidates. Maximal degree in co-relation 25387. Up to 3350 conditions per place. [2024-06-28 04:22:55,513 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 143 changer transitions 0/425 dead transitions. [2024-06-28 04:22:55,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 425 transitions, 5549 flow [2024-06-28 04:22:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:22:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:22:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-28 04:22:55,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2024-06-28 04:22:55,514 INFO L175 Difference]: Start difference. First operand has 315 places, 378 transitions, 4347 flow. Second operand 12 states and 203 transitions. [2024-06-28 04:22:55,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 425 transitions, 5549 flow [2024-06-28 04:22:56,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 425 transitions, 5282 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 04:22:56,921 INFO L231 Difference]: Finished difference. Result has 318 places, 381 transitions, 4432 flow [2024-06-28 04:22:56,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4432, PETRI_PLACES=318, PETRI_TRANSITIONS=381} [2024-06-28 04:22:56,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-28 04:22:56,922 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 381 transitions, 4432 flow [2024-06-28 04:22:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:22:56,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:22:56,922 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] [2024-06-28 04:22:56,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:22:56,922 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)] === [2024-06-28 04:22:56,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:22:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash -441994332, now seen corresponding path program 22 times [2024-06-28 04:22:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:22:56,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615889734] [2024-06-28 04:22:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:22:56,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:22:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:00,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615889734] [2024-06-28 04:23:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615889734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:00,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118215571] [2024-06-28 04:23:00,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:00,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:00,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 381 transitions, 4432 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:00,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:00,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:02,060 INFO L124 PetriNetUnfolderBase]: 2425/3984 cut-off events. [2024-06-28 04:23:02,061 INFO L125 PetriNetUnfolderBase]: For 253894/253894 co-relation queries the response was YES. [2024-06-28 04:23:02,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25299 conditions, 3984 events. 2425/3984 cut-off events. For 253894/253894 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24007 event pairs, 485 based on Foata normal form. 2/3986 useless extension candidates. Maximal degree in co-relation 25155. Up to 3345 conditions per place. [2024-06-28 04:23:02,112 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 150 changer transitions 0/429 dead transitions. [2024-06-28 04:23:02,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 429 transitions, 5416 flow [2024-06-28 04:23:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:23:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:23:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-28 04:23:02,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090056285178236 [2024-06-28 04:23:02,114 INFO L175 Difference]: Start difference. First operand has 318 places, 381 transitions, 4432 flow. Second operand 13 states and 218 transitions. [2024-06-28 04:23:02,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 429 transitions, 5416 flow [2024-06-28 04:23:03,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 429 transitions, 4947 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-28 04:23:03,455 INFO L231 Difference]: Finished difference. Result has 318 places, 381 transitions, 4273 flow [2024-06-28 04:23:03,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4273, PETRI_PLACES=318, PETRI_TRANSITIONS=381} [2024-06-28 04:23:03,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-28 04:23:03,456 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 381 transitions, 4273 flow [2024-06-28 04:23:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:03,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:03,469 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] [2024-06-28 04:23:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:23:03,469 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)] === [2024-06-28 04:23:03,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1133707691, now seen corresponding path program 1 times [2024-06-28 04:23:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:03,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359646490] [2024-06-28 04:23:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:03,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359646490] [2024-06-28 04:23:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359646490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:06,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273653267] [2024-06-28 04:23:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:06,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 381 transitions, 4273 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:06,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:06,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:06,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:08,394 INFO L124 PetriNetUnfolderBase]: 2524/4141 cut-off events. [2024-06-28 04:23:08,395 INFO L125 PetriNetUnfolderBase]: For 329835/329835 co-relation queries the response was YES. [2024-06-28 04:23:08,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27573 conditions, 4141 events. 2524/4141 cut-off events. For 329835/329835 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 24944 event pairs, 422 based on Foata normal form. 6/4147 useless extension candidates. Maximal degree in co-relation 27429. Up to 3297 conditions per place. [2024-06-28 04:23:08,438 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 380 selfloop transitions, 54 changer transitions 0/439 dead transitions. [2024-06-28 04:23:08,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 439 transitions, 5813 flow [2024-06-28 04:23:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:23:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:23:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 04:23:08,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 04:23:08,440 INFO L175 Difference]: Start difference. First operand has 318 places, 381 transitions, 4273 flow. Second operand 10 states and 183 transitions. [2024-06-28 04:23:08,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 439 transitions, 5813 flow [2024-06-28 04:23:09,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 439 transitions, 5455 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-28 04:23:09,474 INFO L231 Difference]: Finished difference. Result has 314 places, 384 transitions, 4099 flow [2024-06-28 04:23:09,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4099, PETRI_PLACES=314, PETRI_TRANSITIONS=384} [2024-06-28 04:23:09,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-28 04:23:09,475 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 384 transitions, 4099 flow [2024-06-28 04:23:09,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:09,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:09,475 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] [2024-06-28 04:23:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:23:09,476 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)] === [2024-06-28 04:23:09,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1461315491, now seen corresponding path program 2 times [2024-06-28 04:23:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:09,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945306279] [2024-06-28 04:23:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945306279] [2024-06-28 04:23:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945306279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:13,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:13,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:13,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626566342] [2024-06-28 04:23:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:13,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:13,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:13,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:13,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 384 transitions, 4099 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:13,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:13,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:13,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:15,128 INFO L124 PetriNetUnfolderBase]: 2511/4122 cut-off events. [2024-06-28 04:23:15,128 INFO L125 PetriNetUnfolderBase]: For 302376/302376 co-relation queries the response was YES. [2024-06-28 04:23:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26683 conditions, 4122 events. 2511/4122 cut-off events. For 302376/302376 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 24840 event pairs, 443 based on Foata normal form. 6/4128 useless extension candidates. Maximal degree in co-relation 26539. Up to 3703 conditions per place. [2024-06-28 04:23:15,183 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 380 selfloop transitions, 38 changer transitions 0/423 dead transitions. [2024-06-28 04:23:15,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 423 transitions, 5067 flow [2024-06-28 04:23:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:23:15,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-28 04:23:15,185 INFO L175 Difference]: Start difference. First operand has 314 places, 384 transitions, 4099 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:23:15,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 423 transitions, 5067 flow [2024-06-28 04:23:16,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 423 transitions, 4995 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:16,474 INFO L231 Difference]: Finished difference. Result has 318 places, 384 transitions, 4107 flow [2024-06-28 04:23:16,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4107, PETRI_PLACES=318, PETRI_TRANSITIONS=384} [2024-06-28 04:23:16,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-28 04:23:16,475 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 384 transitions, 4107 flow [2024-06-28 04:23:16,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:16,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:16,475 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] [2024-06-28 04:23:16,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:23:16,475 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)] === [2024-06-28 04:23:16,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1611830869, now seen corresponding path program 3 times [2024-06-28 04:23:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:16,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035369476] [2024-06-28 04:23:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:19,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:19,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035369476] [2024-06-28 04:23:19,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035369476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:19,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:19,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483018494] [2024-06-28 04:23:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:19,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:19,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:19,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 384 transitions, 4107 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:19,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:19,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:19,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:21,026 INFO L124 PetriNetUnfolderBase]: 2539/4166 cut-off events. [2024-06-28 04:23:21,026 INFO L125 PetriNetUnfolderBase]: For 319451/319451 co-relation queries the response was YES. [2024-06-28 04:23:21,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 4166 events. 2539/4166 cut-off events. For 319451/319451 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 25258 event pairs, 533 based on Foata normal form. 8/4174 useless extension candidates. Maximal degree in co-relation 26899. Up to 3543 conditions per place. [2024-06-28 04:23:21,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 44 changer transitions 0/432 dead transitions. [2024-06-28 04:23:21,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 432 transitions, 5381 flow [2024-06-28 04:23:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:23:21,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:23:21,083 INFO L175 Difference]: Start difference. First operand has 318 places, 384 transitions, 4107 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:23:21,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 432 transitions, 5381 flow [2024-06-28 04:23:22,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 432 transitions, 5273 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 04:23:22,111 INFO L231 Difference]: Finished difference. Result has 318 places, 385 transitions, 4113 flow [2024-06-28 04:23:22,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4113, PETRI_PLACES=318, PETRI_TRANSITIONS=385} [2024-06-28 04:23:22,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-28 04:23:22,112 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 385 transitions, 4113 flow [2024-06-28 04:23:22,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:22,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:22,112 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] [2024-06-28 04:23:22,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:23:22,112 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)] === [2024-06-28 04:23:22,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:22,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1287080029, now seen corresponding path program 4 times [2024-06-28 04:23:22,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:22,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828944193] [2024-06-28 04:23:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:22,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:25,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:25,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828944193] [2024-06-28 04:23:25,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828944193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:25,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:25,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:25,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226461254] [2024-06-28 04:23:25,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:25,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:25,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:25,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:25,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:25,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 385 transitions, 4113 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:25,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:25,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:25,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:27,318 INFO L124 PetriNetUnfolderBase]: 2521/4140 cut-off events. [2024-06-28 04:23:27,318 INFO L125 PetriNetUnfolderBase]: For 290374/290374 co-relation queries the response was YES. [2024-06-28 04:23:27,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26166 conditions, 4140 events. 2521/4140 cut-off events. For 290374/290374 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 25178 event pairs, 543 based on Foata normal form. 8/4148 useless extension candidates. Maximal degree in co-relation 26019. Up to 3755 conditions per place. [2024-06-28 04:23:27,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 41 changer transitions 0/423 dead transitions. [2024-06-28 04:23:27,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 423 transitions, 5097 flow [2024-06-28 04:23:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:23:27,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 04:23:27,368 INFO L175 Difference]: Start difference. First operand has 318 places, 385 transitions, 4113 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:23:27,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 423 transitions, 5097 flow [2024-06-28 04:23:28,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 423 transitions, 4989 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:23:28,819 INFO L231 Difference]: Finished difference. Result has 320 places, 385 transitions, 4092 flow [2024-06-28 04:23:28,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4092, PETRI_PLACES=320, PETRI_TRANSITIONS=385} [2024-06-28 04:23:28,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-28 04:23:28,820 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 385 transitions, 4092 flow [2024-06-28 04:23:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:28,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:28,820 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] [2024-06-28 04:23:28,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:23:28,821 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)] === [2024-06-28 04:23:28,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash -852697441, now seen corresponding path program 5 times [2024-06-28 04:23:28,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383584376] [2024-06-28 04:23:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:32,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:32,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383584376] [2024-06-28 04:23:32,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383584376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:32,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:32,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:32,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155085647] [2024-06-28 04:23:32,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:32,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:32,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:32,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:32,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 385 transitions, 4092 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:32,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:32,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:32,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:33,929 INFO L124 PetriNetUnfolderBase]: 2595/4250 cut-off events. [2024-06-28 04:23:33,929 INFO L125 PetriNetUnfolderBase]: For 332709/332709 co-relation queries the response was YES. [2024-06-28 04:23:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27687 conditions, 4250 events. 2595/4250 cut-off events. For 332709/332709 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 25944 event pairs, 562 based on Foata normal form. 8/4257 useless extension candidates. Maximal degree in co-relation 27539. Up to 3543 conditions per place. [2024-06-28 04:23:33,986 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 331 selfloop transitions, 95 changer transitions 0/431 dead transitions. [2024-06-28 04:23:33,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 431 transitions, 5382 flow [2024-06-28 04:23:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:23:33,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:23:33,988 INFO L175 Difference]: Start difference. First operand has 320 places, 385 transitions, 4092 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:23:33,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 431 transitions, 5382 flow [2024-06-28 04:23:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 431 transitions, 5264 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-28 04:23:35,687 INFO L231 Difference]: Finished difference. Result has 320 places, 387 transitions, 4214 flow [2024-06-28 04:23:35,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=320, PETRI_TRANSITIONS=387} [2024-06-28 04:23:35,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-28 04:23:35,688 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 387 transitions, 4214 flow [2024-06-28 04:23:35,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:35,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:35,688 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] [2024-06-28 04:23:35,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:23:35,689 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)] === [2024-06-28 04:23:35,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -845078881, now seen corresponding path program 6 times [2024-06-28 04:23:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:35,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282911143] [2024-06-28 04:23:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:38,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:38,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282911143] [2024-06-28 04:23:38,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282911143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:38,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:38,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470396508] [2024-06-28 04:23:38,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:38,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:38,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:38,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 387 transitions, 4214 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:38,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:38,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:38,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:40,879 INFO L124 PetriNetUnfolderBase]: 2623/4294 cut-off events. [2024-06-28 04:23:40,880 INFO L125 PetriNetUnfolderBase]: For 341476/341476 co-relation queries the response was YES. [2024-06-28 04:23:40,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28145 conditions, 4294 events. 2623/4294 cut-off events. For 341476/341476 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26327 event pairs, 582 based on Foata normal form. 8/4301 useless extension candidates. Maximal degree in co-relation 27997. Up to 3773 conditions per place. [2024-06-28 04:23:40,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 94 changer transitions 0/423 dead transitions. [2024-06-28 04:23:40,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 423 transitions, 5214 flow [2024-06-28 04:23:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:23:40,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 04:23:40,945 INFO L175 Difference]: Start difference. First operand has 320 places, 387 transitions, 4214 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:23:40,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 423 transitions, 5214 flow [2024-06-28 04:23:42,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 423 transitions, 5086 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:23:42,574 INFO L231 Difference]: Finished difference. Result has 324 places, 388 transitions, 4305 flow [2024-06-28 04:23:42,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4305, PETRI_PLACES=324, PETRI_TRANSITIONS=388} [2024-06-28 04:23:42,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-28 04:23:42,575 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 388 transitions, 4305 flow [2024-06-28 04:23:42,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:42,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:42,576 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] [2024-06-28 04:23:42,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:23:42,576 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)] === [2024-06-28 04:23:42,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 671032673, now seen corresponding path program 7 times [2024-06-28 04:23:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976749243] [2024-06-28 04:23:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:42,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:46,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:46,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976749243] [2024-06-28 04:23:46,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976749243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:46,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:46,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102793373] [2024-06-28 04:23:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:46,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:46,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 388 transitions, 4305 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:46,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:46,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:48,329 INFO L124 PetriNetUnfolderBase]: 2651/4338 cut-off events. [2024-06-28 04:23:48,329 INFO L125 PetriNetUnfolderBase]: For 348036/348036 co-relation queries the response was YES. [2024-06-28 04:23:48,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 4338 events. 2651/4338 cut-off events. For 348036/348036 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 26605 event pairs, 586 based on Foata normal form. 8/4345 useless extension candidates. Maximal degree in co-relation 28497. Up to 3817 conditions per place. [2024-06-28 04:23:48,386 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 93 changer transitions 0/420 dead transitions. [2024-06-28 04:23:48,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 420 transitions, 5285 flow [2024-06-28 04:23:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 04:23:48,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 04:23:48,387 INFO L175 Difference]: Start difference. First operand has 324 places, 388 transitions, 4305 flow. Second operand 9 states and 152 transitions. [2024-06-28 04:23:48,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 420 transitions, 5285 flow [2024-06-28 04:23:49,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 420 transitions, 5096 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 04:23:49,908 INFO L231 Difference]: Finished difference. Result has 326 places, 389 transitions, 4331 flow [2024-06-28 04:23:49,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4331, PETRI_PLACES=326, PETRI_TRANSITIONS=389} [2024-06-28 04:23:49,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-28 04:23:49,908 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 389 transitions, 4331 flow [2024-06-28 04:23:49,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:49,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:49,909 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] [2024-06-28 04:23:49,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:23:49,909 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)] === [2024-06-28 04:23:49,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1122306905, now seen corresponding path program 8 times [2024-06-28 04:23:49,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:49,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075773095] [2024-06-28 04:23:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:23:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:23:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:23:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075773095] [2024-06-28 04:23:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075773095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:23:53,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:23:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:23:53,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887372084] [2024-06-28 04:23:53,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:23:53,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:23:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:23:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:23:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:23:53,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:23:53,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 389 transitions, 4331 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:53,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:23:53,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:23:53,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:23:55,065 INFO L124 PetriNetUnfolderBase]: 2679/4386 cut-off events. [2024-06-28 04:23:55,065 INFO L125 PetriNetUnfolderBase]: For 355719/355719 co-relation queries the response was YES. [2024-06-28 04:23:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29060 conditions, 4386 events. 2679/4386 cut-off events. For 355719/355719 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 26950 event pairs, 583 based on Foata normal form. 8/4394 useless extension candidates. Maximal degree in co-relation 28909. Up to 4012 conditions per place. [2024-06-28 04:23:55,123 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 37 changer transitions 0/417 dead transitions. [2024-06-28 04:23:55,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 417 transitions, 5295 flow [2024-06-28 04:23:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:23:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:23:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 04:23:55,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-28 04:23:55,125 INFO L175 Difference]: Start difference. First operand has 326 places, 389 transitions, 4331 flow. Second operand 9 states and 145 transitions. [2024-06-28 04:23:55,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 417 transitions, 5295 flow [2024-06-28 04:23:56,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 417 transitions, 5106 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:23:56,735 INFO L231 Difference]: Finished difference. Result has 328 places, 390 transitions, 4247 flow [2024-06-28 04:23:56,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4247, PETRI_PLACES=328, PETRI_TRANSITIONS=390} [2024-06-28 04:23:56,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-28 04:23:56,736 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 390 transitions, 4247 flow [2024-06-28 04:23:56,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:23:56,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:23:56,736 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] [2024-06-28 04:23:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:23:56,736 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)] === [2024-06-28 04:23:56,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:23:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash 914751993, now seen corresponding path program 1 times [2024-06-28 04:23:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:23:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781530696] [2024-06-28 04:23:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:23:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:23:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:00,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:00,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781530696] [2024-06-28 04:24:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781530696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003915324] [2024-06-28 04:24:00,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:00,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:00,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:00,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 390 transitions, 4247 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:00,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:00,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:00,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:01,983 INFO L124 PetriNetUnfolderBase]: 2732/4469 cut-off events. [2024-06-28 04:24:01,984 INFO L125 PetriNetUnfolderBase]: For 382610/382610 co-relation queries the response was YES. [2024-06-28 04:24:02,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30141 conditions, 4469 events. 2732/4469 cut-off events. For 382610/382610 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 27477 event pairs, 572 based on Foata normal form. 6/4474 useless extension candidates. Maximal degree in co-relation 29989. Up to 3167 conditions per place. [2024-06-28 04:24:02,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 108 changer transitions 0/439 dead transitions. [2024-06-28 04:24:02,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 439 transitions, 5763 flow [2024-06-28 04:24:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:24:02,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-28 04:24:02,042 INFO L175 Difference]: Start difference. First operand has 328 places, 390 transitions, 4247 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:24:02,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 439 transitions, 5763 flow [2024-06-28 04:24:03,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 439 transitions, 5684 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:24:03,773 INFO L231 Difference]: Finished difference. Result has 330 places, 392 transitions, 4438 flow [2024-06-28 04:24:03,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4438, PETRI_PLACES=330, PETRI_TRANSITIONS=392} [2024-06-28 04:24:03,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-28 04:24:03,773 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 392 transitions, 4438 flow [2024-06-28 04:24:03,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:03,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:03,774 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] [2024-06-28 04:24:03,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:24:03,774 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)] === [2024-06-28 04:24:03,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash 582651363, now seen corresponding path program 2 times [2024-06-28 04:24:03,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:03,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513377536] [2024-06-28 04:24:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:03,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:06,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:06,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513377536] [2024-06-28 04:24:06,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513377536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:06,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:06,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669580315] [2024-06-28 04:24:06,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:06,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:06,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:06,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:06,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:06,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 392 transitions, 4438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:06,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:06,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:06,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:08,492 INFO L124 PetriNetUnfolderBase]: 2752/4505 cut-off events. [2024-06-28 04:24:08,493 INFO L125 PetriNetUnfolderBase]: For 391871/391871 co-relation queries the response was YES. [2024-06-28 04:24:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30810 conditions, 4505 events. 2752/4505 cut-off events. For 391871/391871 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 27756 event pairs, 565 based on Foata normal form. 6/4510 useless extension candidates. Maximal degree in co-relation 30657. Up to 3179 conditions per place. [2024-06-28 04:24:08,555 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 323 selfloop transitions, 108 changer transitions 0/436 dead transitions. [2024-06-28 04:24:08,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 436 transitions, 5742 flow [2024-06-28 04:24:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:24:08,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:24:08,557 INFO L175 Difference]: Start difference. First operand has 330 places, 392 transitions, 4438 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:24:08,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 436 transitions, 5742 flow [2024-06-28 04:24:10,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 436 transitions, 5496 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:10,482 INFO L231 Difference]: Finished difference. Result has 333 places, 393 transitions, 4438 flow [2024-06-28 04:24:10,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4438, PETRI_PLACES=333, PETRI_TRANSITIONS=393} [2024-06-28 04:24:10,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-28 04:24:10,483 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 393 transitions, 4438 flow [2024-06-28 04:24:10,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:10,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:10,483 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] [2024-06-28 04:24:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:24:10,484 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)] === [2024-06-28 04:24:10,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 582651704, now seen corresponding path program 1 times [2024-06-28 04:24:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:10,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447604248] [2024-06-28 04:24:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:10,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:13,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447604248] [2024-06-28 04:24:13,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447604248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:13,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:13,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057185544] [2024-06-28 04:24:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:13,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:13,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 393 transitions, 4438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:13,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:13,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:13,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:15,553 INFO L124 PetriNetUnfolderBase]: 2839/4612 cut-off events. [2024-06-28 04:24:15,553 INFO L125 PetriNetUnfolderBase]: For 459695/459695 co-relation queries the response was YES. [2024-06-28 04:24:15,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32477 conditions, 4612 events. 2839/4612 cut-off events. For 459695/459695 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28317 event pairs, 602 based on Foata normal form. 8/4619 useless extension candidates. Maximal degree in co-relation 32323. Up to 3984 conditions per place. [2024-06-28 04:24:15,616 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 92 changer transitions 0/440 dead transitions. [2024-06-28 04:24:15,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 440 transitions, 5710 flow [2024-06-28 04:24:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 04:24:15,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-28 04:24:15,618 INFO L175 Difference]: Start difference. First operand has 333 places, 393 transitions, 4438 flow. Second operand 11 states and 186 transitions. [2024-06-28 04:24:15,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 440 transitions, 5710 flow [2024-06-28 04:24:17,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 440 transitions, 5532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:24:17,694 INFO L231 Difference]: Finished difference. Result has 338 places, 395 transitions, 4482 flow [2024-06-28 04:24:17,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4482, PETRI_PLACES=338, PETRI_TRANSITIONS=395} [2024-06-28 04:24:17,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-28 04:24:17,695 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 395 transitions, 4482 flow [2024-06-28 04:24:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:17,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:17,695 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] [2024-06-28 04:24:17,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:24:17,696 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)] === [2024-06-28 04:24:17,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash 671365334, now seen corresponding path program 2 times [2024-06-28 04:24:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004952753] [2024-06-28 04:24:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:21,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:21,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004952753] [2024-06-28 04:24:21,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004952753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:21,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:21,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963462248] [2024-06-28 04:24:21,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:21,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:21,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:21,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:21,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 395 transitions, 4482 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:21,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:21,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:21,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:22,991 INFO L124 PetriNetUnfolderBase]: 2875/4678 cut-off events. [2024-06-28 04:24:22,991 INFO L125 PetriNetUnfolderBase]: For 479092/479092 co-relation queries the response was YES. [2024-06-28 04:24:23,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32884 conditions, 4678 events. 2875/4678 cut-off events. For 479092/479092 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28929 event pairs, 632 based on Foata normal form. 10/4687 useless extension candidates. Maximal degree in co-relation 32729. Up to 4209 conditions per place. [2024-06-28 04:24:23,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 342 selfloop transitions, 85 changer transitions 0/432 dead transitions. [2024-06-28 04:24:23,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 432 transitions, 5486 flow [2024-06-28 04:24:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 04:24:23,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-28 04:24:23,054 INFO L175 Difference]: Start difference. First operand has 338 places, 395 transitions, 4482 flow. Second operand 11 states and 178 transitions. [2024-06-28 04:24:23,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 432 transitions, 5486 flow [2024-06-28 04:24:25,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 432 transitions, 5369 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:24:25,704 INFO L231 Difference]: Finished difference. Result has 342 places, 396 transitions, 4560 flow [2024-06-28 04:24:25,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4560, PETRI_PLACES=342, PETRI_TRANSITIONS=396} [2024-06-28 04:24:25,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-28 04:24:25,705 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 396 transitions, 4560 flow [2024-06-28 04:24:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:25,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:25,705 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] [2024-06-28 04:24:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:24:25,705 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)] === [2024-06-28 04:24:25,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1034735369, now seen corresponding path program 3 times [2024-06-28 04:24:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:25,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130175893] [2024-06-28 04:24:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:28,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:28,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130175893] [2024-06-28 04:24:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130175893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:28,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:28,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:28,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502625266] [2024-06-28 04:24:28,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:28,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:28,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:28,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:28,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:28,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:28,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 396 transitions, 4560 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:28,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:28,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:28,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:30,771 INFO L124 PetriNetUnfolderBase]: 2895/4734 cut-off events. [2024-06-28 04:24:30,771 INFO L125 PetriNetUnfolderBase]: For 466510/466510 co-relation queries the response was YES. [2024-06-28 04:24:30,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33348 conditions, 4734 events. 2895/4734 cut-off events. For 466510/466510 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29491 event pairs, 658 based on Foata normal form. 6/4739 useless extension candidates. Maximal degree in co-relation 33191. Up to 4103 conditions per place. [2024-06-28 04:24:30,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 97 changer transitions 0/431 dead transitions. [2024-06-28 04:24:30,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 431 transitions, 5581 flow [2024-06-28 04:24:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:24:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:24:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:24:30,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-28 04:24:30,836 INFO L175 Difference]: Start difference. First operand has 342 places, 396 transitions, 4560 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:24:30,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 431 transitions, 5581 flow [2024-06-28 04:24:33,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 431 transitions, 5406 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-28 04:24:33,139 INFO L231 Difference]: Finished difference. Result has 342 places, 397 transitions, 4602 flow [2024-06-28 04:24:33,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4602, PETRI_PLACES=342, PETRI_TRANSITIONS=397} [2024-06-28 04:24:33,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-28 04:24:33,140 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 397 transitions, 4602 flow [2024-06-28 04:24:33,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:33,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:33,140 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] [2024-06-28 04:24:33,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:24:33,141 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)] === [2024-06-28 04:24:33,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:33,141 INFO L85 PathProgramCache]: Analyzing trace with hash 671217464, now seen corresponding path program 3 times [2024-06-28 04:24:33,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:33,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815513441] [2024-06-28 04:24:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:33,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815513441] [2024-06-28 04:24:36,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815513441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:36,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:36,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:36,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145662705] [2024-06-28 04:24:36,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:36,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:36,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:36,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:36,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 397 transitions, 4602 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:36,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:36,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:36,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:38,554 INFO L124 PetriNetUnfolderBase]: 2923/4756 cut-off events. [2024-06-28 04:24:38,555 INFO L125 PetriNetUnfolderBase]: For 487259/487259 co-relation queries the response was YES. [2024-06-28 04:24:38,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33647 conditions, 4756 events. 2923/4756 cut-off events. For 487259/487259 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29471 event pairs, 634 based on Foata normal form. 8/4763 useless extension candidates. Maximal degree in co-relation 33489. Up to 4247 conditions per place. [2024-06-28 04:24:38,617 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 346 selfloop transitions, 88 changer transitions 0/439 dead transitions. [2024-06-28 04:24:38,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 439 transitions, 5646 flow [2024-06-28 04:24:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:24:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:24:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-28 04:24:38,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39227642276422764 [2024-06-28 04:24:38,619 INFO L175 Difference]: Start difference. First operand has 342 places, 397 transitions, 4602 flow. Second operand 12 states and 193 transitions. [2024-06-28 04:24:38,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 439 transitions, 5646 flow [2024-06-28 04:24:41,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 439 transitions, 5450 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 04:24:41,086 INFO L231 Difference]: Finished difference. Result has 347 places, 398 transitions, 4608 flow [2024-06-28 04:24:41,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4406, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4608, PETRI_PLACES=347, PETRI_TRANSITIONS=398} [2024-06-28 04:24:41,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-28 04:24:41,087 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 398 transitions, 4608 flow [2024-06-28 04:24:41,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:41,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:41,087 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] [2024-06-28 04:24:41,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:24:41,087 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)] === [2024-06-28 04:24:41,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash 91524468, now seen corresponding path program 4 times [2024-06-28 04:24:41,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:41,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134200363] [2024-06-28 04:24:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:41,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:44,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:44,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134200363] [2024-06-28 04:24:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134200363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:24:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396170635] [2024-06-28 04:24:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:44,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:24:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:24:44,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:24:44,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:44,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 398 transitions, 4608 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:44,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:44,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:44,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:46,545 INFO L124 PetriNetUnfolderBase]: 3063/4998 cut-off events. [2024-06-28 04:24:46,546 INFO L125 PetriNetUnfolderBase]: For 695256/695256 co-relation queries the response was YES. [2024-06-28 04:24:46,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35024 conditions, 4998 events. 3063/4998 cut-off events. For 695256/695256 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31298 event pairs, 687 based on Foata normal form. 44/5042 useless extension candidates. Maximal degree in co-relation 34865. Up to 4335 conditions per place. [2024-06-28 04:24:46,613 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 59 changer transitions 11/436 dead transitions. [2024-06-28 04:24:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 436 transitions, 5642 flow [2024-06-28 04:24:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:24:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:24:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-28 04:24:46,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:24:46,615 INFO L175 Difference]: Start difference. First operand has 347 places, 398 transitions, 4608 flow. Second operand 12 states and 192 transitions. [2024-06-28 04:24:46,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 436 transitions, 5642 flow [2024-06-28 04:24:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 436 transitions, 5454 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 04:24:49,650 INFO L231 Difference]: Finished difference. Result has 349 places, 390 transitions, 4470 flow [2024-06-28 04:24:49,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4420, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4470, PETRI_PLACES=349, PETRI_TRANSITIONS=390} [2024-06-28 04:24:49,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-28 04:24:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 390 transitions, 4470 flow [2024-06-28 04:24:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:49,651 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] [2024-06-28 04:24:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:24:49,651 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)] === [2024-06-28 04:24:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 790270166, now seen corresponding path program 5 times [2024-06-28 04:24:49,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:49,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047795633] [2024-06-28 04:24:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:49,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:24:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:24:53,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:24:53,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047795633] [2024-06-28 04:24:53,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047795633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:24:53,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:24:53,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:24:53,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290488627] [2024-06-28 04:24:53,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:24:53,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:24:53,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:24:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:24:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:24:53,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:24:53,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 390 transitions, 4470 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:53,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:24:53,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:24:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:24:55,623 INFO L124 PetriNetUnfolderBase]: 3067/5006 cut-off events. [2024-06-28 04:24:55,623 INFO L125 PetriNetUnfolderBase]: For 709214/709214 co-relation queries the response was YES. [2024-06-28 04:24:55,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35075 conditions, 5006 events. 3067/5006 cut-off events. For 709214/709214 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31339 event pairs, 695 based on Foata normal form. 44/5050 useless extension candidates. Maximal degree in co-relation 34915. Up to 4381 conditions per place. [2024-06-28 04:24:55,687 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 55 changer transitions 6/427 dead transitions. [2024-06-28 04:24:55,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 427 transitions, 5486 flow [2024-06-28 04:24:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:24:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:24:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-28 04:24:55,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-28 04:24:55,689 INFO L175 Difference]: Start difference. First operand has 349 places, 390 transitions, 4470 flow. Second operand 11 states and 180 transitions. [2024-06-28 04:24:55,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 427 transitions, 5486 flow [2024-06-28 04:24:57,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 427 transitions, 5347 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-28 04:24:57,971 INFO L231 Difference]: Finished difference. Result has 349 places, 387 transitions, 4432 flow [2024-06-28 04:24:57,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4432, PETRI_PLACES=349, PETRI_TRANSITIONS=387} [2024-06-28 04:24:57,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-28 04:24:57,972 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 387 transitions, 4432 flow [2024-06-28 04:24:57,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:24:57,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:24:57,972 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] [2024-06-28 04:24:57,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:24:57,972 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)] === [2024-06-28 04:24:57,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:24:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1122491696, now seen corresponding path program 6 times [2024-06-28 04:24:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:24:57,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221586459] [2024-06-28 04:24:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:24:57,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:24:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:01,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221586459] [2024-06-28 04:25:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221586459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:01,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:01,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754836462] [2024-06-28 04:25:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:01,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:01,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 387 transitions, 4432 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:01,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:01,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:01,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:03,093 INFO L124 PetriNetUnfolderBase]: 3075/5020 cut-off events. [2024-06-28 04:25:03,093 INFO L125 PetriNetUnfolderBase]: For 686590/686590 co-relation queries the response was YES. [2024-06-28 04:25:03,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35089 conditions, 5020 events. 3075/5020 cut-off events. For 686590/686590 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31407 event pairs, 651 based on Foata normal form. 40/5060 useless extension candidates. Maximal degree in co-relation 34929. Up to 4297 conditions per place. [2024-06-28 04:25:03,164 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 54 changer transitions 10/430 dead transitions. [2024-06-28 04:25:03,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 430 transitions, 5524 flow [2024-06-28 04:25:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:25:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:25:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-28 04:25:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-28 04:25:03,166 INFO L175 Difference]: Start difference. First operand has 349 places, 387 transitions, 4432 flow. Second operand 11 states and 184 transitions. [2024-06-28 04:25:03,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 430 transitions, 5524 flow [2024-06-28 04:25:05,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 430 transitions, 5403 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 04:25:05,519 INFO L231 Difference]: Finished difference. Result has 351 places, 383 transitions, 4376 flow [2024-06-28 04:25:05,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4376, PETRI_PLACES=351, PETRI_TRANSITIONS=383} [2024-06-28 04:25:05,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-28 04:25:05,520 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 383 transitions, 4376 flow [2024-06-28 04:25:05,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:05,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:05,521 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, 1, 1] [2024-06-28 04:25:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:25:05,522 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)] === [2024-06-28 04:25:05,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1122491355, now seen corresponding path program 4 times [2024-06-28 04:25:05,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:05,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337045332] [2024-06-28 04:25:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:09,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337045332] [2024-06-28 04:25:09,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337045332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:09,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:09,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:09,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379761804] [2024-06-28 04:25:09,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:09,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:09,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:09,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:09,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 383 transitions, 4376 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:09,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:09,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:11,410 INFO L124 PetriNetUnfolderBase]: 2964/4855 cut-off events. [2024-06-28 04:25:11,410 INFO L125 PetriNetUnfolderBase]: For 503202/503202 co-relation queries the response was YES. [2024-06-28 04:25:11,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34204 conditions, 4855 events. 2964/4855 cut-off events. For 503202/503202 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30365 event pairs, 681 based on Foata normal form. 6/4861 useless extension candidates. Maximal degree in co-relation 34043. Up to 4446 conditions per place. [2024-06-28 04:25:11,470 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 34 changer transitions 0/414 dead transitions. [2024-06-28 04:25:11,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 414 transitions, 5353 flow [2024-06-28 04:25:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:25:11,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:25:11,494 INFO L175 Difference]: Start difference. First operand has 351 places, 383 transitions, 4376 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:25:11,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 414 transitions, 5353 flow [2024-06-28 04:25:13,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 414 transitions, 5207 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 04:25:13,851 INFO L231 Difference]: Finished difference. Result has 351 places, 384 transitions, 4323 flow [2024-06-28 04:25:13,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4323, PETRI_PLACES=351, PETRI_TRANSITIONS=384} [2024-06-28 04:25:13,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-28 04:25:13,852 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 384 transitions, 4323 flow [2024-06-28 04:25:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:13,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:13,852 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] [2024-06-28 04:25:13,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:25:13,852 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:13,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1329565868, now seen corresponding path program 1 times [2024-06-28 04:25:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447071691] [2024-06-28 04:25:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:17,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447071691] [2024-06-28 04:25:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447071691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:25:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627329113] [2024-06-28 04:25:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:25:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:25:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:25:17,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:17,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 384 transitions, 4323 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:17,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:17,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:19,724 INFO L124 PetriNetUnfolderBase]: 3072/5041 cut-off events. [2024-06-28 04:25:19,724 INFO L125 PetriNetUnfolderBase]: For 681698/681698 co-relation queries the response was YES. [2024-06-28 04:25:19,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34963 conditions, 5041 events. 3072/5041 cut-off events. For 681698/681698 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31690 event pairs, 655 based on Foata normal form. 36/5077 useless extension candidates. Maximal degree in co-relation 34801. Up to 4239 conditions per place. [2024-06-28 04:25:19,795 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 47 changer transitions 17/430 dead transitions. [2024-06-28 04:25:19,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 430 transitions, 5443 flow [2024-06-28 04:25:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:25:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:25:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-28 04:25:19,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-28 04:25:19,797 INFO L175 Difference]: Start difference. First operand has 351 places, 384 transitions, 4323 flow. Second operand 12 states and 194 transitions. [2024-06-28 04:25:19,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 430 transitions, 5443 flow [2024-06-28 04:25:22,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 430 transitions, 5371 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:22,525 INFO L231 Difference]: Finished difference. Result has 357 places, 376 transitions, 4220 flow [2024-06-28 04:25:22,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4220, PETRI_PLACES=357, PETRI_TRANSITIONS=376} [2024-06-28 04:25:22,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-28 04:25:22,526 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 376 transitions, 4220 flow [2024-06-28 04:25:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:22,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:22,526 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] [2024-06-28 04:25:22,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:25:22,527 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:22,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1630761985, now seen corresponding path program 9 times [2024-06-28 04:25:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:22,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997911980] [2024-06-28 04:25:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:22,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:25,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:25,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997911980] [2024-06-28 04:25:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997911980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:25,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:25,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:25,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425243616] [2024-06-28 04:25:25,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:25,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:25,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:25,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 376 transitions, 4220 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:25,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:25,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:25,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:27,467 INFO L124 PetriNetUnfolderBase]: 2947/4824 cut-off events. [2024-06-28 04:25:27,467 INFO L125 PetriNetUnfolderBase]: For 568513/568513 co-relation queries the response was YES. [2024-06-28 04:25:27,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34809 conditions, 4824 events. 2947/4824 cut-off events. For 568513/568513 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 30096 event pairs, 705 based on Foata normal form. 8/4831 useless extension candidates. Maximal degree in co-relation 34645. Up to 4116 conditions per place. [2024-06-28 04:25:27,523 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 87 changer transitions 0/418 dead transitions. [2024-06-28 04:25:27,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 418 transitions, 5506 flow [2024-06-28 04:25:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 04:25:27,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-28 04:25:27,525 INFO L175 Difference]: Start difference. First operand has 357 places, 376 transitions, 4220 flow. Second operand 9 states and 160 transitions. [2024-06-28 04:25:27,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 418 transitions, 5506 flow [2024-06-28 04:25:30,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 418 transitions, 5422 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 04:25:30,159 INFO L231 Difference]: Finished difference. Result has 356 places, 378 transitions, 4364 flow [2024-06-28 04:25:30,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4364, PETRI_PLACES=356, PETRI_TRANSITIONS=378} [2024-06-28 04:25:30,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-28 04:25:30,160 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 378 transitions, 4364 flow [2024-06-28 04:25:30,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:30,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:30,160 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] [2024-06-28 04:25:30,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:25:30,161 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:30,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 825253965, now seen corresponding path program 10 times [2024-06-28 04:25:30,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:30,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49270082] [2024-06-28 04:25:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:30,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:33,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49270082] [2024-06-28 04:25:33,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49270082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:33,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:33,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:33,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451893298] [2024-06-28 04:25:33,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:33,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:33,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:33,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:33,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 378 transitions, 4364 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:33,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:33,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:33,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:35,668 INFO L124 PetriNetUnfolderBase]: 2975/4868 cut-off events. [2024-06-28 04:25:35,668 INFO L125 PetriNetUnfolderBase]: For 579983/579983 co-relation queries the response was YES. [2024-06-28 04:25:35,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35425 conditions, 4868 events. 2975/4868 cut-off events. For 579983/579983 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30475 event pairs, 725 based on Foata normal form. 8/4875 useless extension candidates. Maximal degree in co-relation 35259. Up to 4346 conditions per place. [2024-06-28 04:25:35,738 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 86 changer transitions 0/410 dead transitions. [2024-06-28 04:25:35,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 410 transitions, 5330 flow [2024-06-28 04:25:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 04:25:35,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 04:25:35,739 INFO L175 Difference]: Start difference. First operand has 356 places, 378 transitions, 4364 flow. Second operand 9 states and 152 transitions. [2024-06-28 04:25:35,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 410 transitions, 5330 flow [2024-06-28 04:25:38,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 410 transitions, 5207 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:25:38,458 INFO L231 Difference]: Finished difference. Result has 360 places, 379 transitions, 4446 flow [2024-06-28 04:25:38,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4247, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4446, PETRI_PLACES=360, PETRI_TRANSITIONS=379} [2024-06-28 04:25:38,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-28 04:25:38,470 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 379 transitions, 4446 flow [2024-06-28 04:25:38,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:38,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:38,470 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] [2024-06-28 04:25:38,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:25:38,470 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:38,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1364855455, now seen corresponding path program 11 times [2024-06-28 04:25:38,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:38,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215514703] [2024-06-28 04:25:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:38,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:41,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215514703] [2024-06-28 04:25:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215514703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:41,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:41,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632562224] [2024-06-28 04:25:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:41,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:41,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:41,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:41,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 379 transitions, 4446 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:41,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:41,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:41,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:43,940 INFO L124 PetriNetUnfolderBase]: 3003/4912 cut-off events. [2024-06-28 04:25:43,940 INFO L125 PetriNetUnfolderBase]: For 589614/589614 co-relation queries the response was YES. [2024-06-28 04:25:43,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35883 conditions, 4912 events. 3003/4912 cut-off events. For 589614/589614 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30837 event pairs, 729 based on Foata normal form. 8/4919 useless extension candidates. Maximal degree in co-relation 35715. Up to 4390 conditions per place. [2024-06-28 04:25:43,999 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 84 changer transitions 0/408 dead transitions. [2024-06-28 04:25:43,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 408 transitions, 5396 flow [2024-06-28 04:25:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:25:44,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 04:25:44,000 INFO L175 Difference]: Start difference. First operand has 360 places, 379 transitions, 4446 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:25:44,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 408 transitions, 5396 flow [2024-06-28 04:25:46,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 408 transitions, 5223 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:46,867 INFO L231 Difference]: Finished difference. Result has 362 places, 380 transitions, 4470 flow [2024-06-28 04:25:46,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4470, PETRI_PLACES=362, PETRI_TRANSITIONS=380} [2024-06-28 04:25:46,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-28 04:25:46,868 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 380 transitions, 4470 flow [2024-06-28 04:25:46,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:46,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:46,868 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] [2024-06-28 04:25:46,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:25:46,868 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:46,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1473715553, now seen corresponding path program 12 times [2024-06-28 04:25:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:46,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826328837] [2024-06-28 04:25:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:46,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:49,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:49,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826328837] [2024-06-28 04:25:49,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826328837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:49,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:49,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198199517] [2024-06-28 04:25:49,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:49,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:49,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:49,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 380 transitions, 4470 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:49,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:49,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:49,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:25:51,911 INFO L124 PetriNetUnfolderBase]: 3031/4956 cut-off events. [2024-06-28 04:25:51,912 INFO L125 PetriNetUnfolderBase]: For 600788/600788 co-relation queries the response was YES. [2024-06-28 04:25:51,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 4956 events. 3031/4956 cut-off events. For 600788/600788 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31183 event pairs, 733 based on Foata normal form. 8/4963 useless extension candidates. Maximal degree in co-relation 36147. Up to 4434 conditions per place. [2024-06-28 04:25:51,981 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 88 changer transitions 0/404 dead transitions. [2024-06-28 04:25:51,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 404 transitions, 5396 flow [2024-06-28 04:25:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:25:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:25:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 04:25:51,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:25:51,983 INFO L175 Difference]: Start difference. First operand has 362 places, 380 transitions, 4470 flow. Second operand 9 states and 144 transitions. [2024-06-28 04:25:51,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 404 transitions, 5396 flow [2024-06-28 04:25:54,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 404 transitions, 5225 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:25:54,526 INFO L231 Difference]: Finished difference. Result has 364 places, 381 transitions, 4506 flow [2024-06-28 04:25:54,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4506, PETRI_PLACES=364, PETRI_TRANSITIONS=381} [2024-06-28 04:25:54,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-28 04:25:54,527 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 381 transitions, 4506 flow [2024-06-28 04:25:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:54,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:25:54,527 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, 1, 1] [2024-06-28 04:25:54,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:25:54,528 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:25:54,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:25:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash -816931009, now seen corresponding path program 13 times [2024-06-28 04:25:54,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:25:54,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874464657] [2024-06-28 04:25:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:25:54,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:25:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:25:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:25:57,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:25:57,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874464657] [2024-06-28 04:25:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874464657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:25:57,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:25:57,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:25:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061751930] [2024-06-28 04:25:57,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:25:57,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:25:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:25:57,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:25:57,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:25:57,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:25:57,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 381 transitions, 4506 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:25:57,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:25:57,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:25:57,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:00,020 INFO L124 PetriNetUnfolderBase]: 3013/4934 cut-off events. [2024-06-28 04:26:00,020 INFO L125 PetriNetUnfolderBase]: For 560150/560150 co-relation queries the response was YES. [2024-06-28 04:26:00,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35309 conditions, 4934 events. 3013/4934 cut-off events. For 560150/560150 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30990 event pairs, 692 based on Foata normal form. 8/4942 useless extension candidates. Maximal degree in co-relation 35139. Up to 4300 conditions per place. [2024-06-28 04:26:00,093 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 71 changer transitions 0/430 dead transitions. [2024-06-28 04:26:00,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 430 transitions, 5540 flow [2024-06-28 04:26:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 04:26:00,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 04:26:00,094 INFO L175 Difference]: Start difference. First operand has 364 places, 381 transitions, 4506 flow. Second operand 10 states and 182 transitions. [2024-06-28 04:26:00,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 430 transitions, 5540 flow [2024-06-28 04:26:02,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 430 transitions, 5355 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 04:26:02,738 INFO L231 Difference]: Finished difference. Result has 367 places, 381 transitions, 4474 flow [2024-06-28 04:26:02,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4474, PETRI_PLACES=367, PETRI_TRANSITIONS=381} [2024-06-28 04:26:02,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-28 04:26:02,739 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 381 transitions, 4474 flow [2024-06-28 04:26:02,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:02,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:02,739 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] [2024-06-28 04:26:02,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:26:02,740 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:02,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1902735167, now seen corresponding path program 14 times [2024-06-28 04:26:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:02,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999120854] [2024-06-28 04:26:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:05,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:05,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999120854] [2024-06-28 04:26:05,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999120854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:05,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:05,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:05,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906076748] [2024-06-28 04:26:05,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:05,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:05,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:05,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:05,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 381 transitions, 4474 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:05,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:05,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:05,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:07,470 INFO L124 PetriNetUnfolderBase]: 2995/4904 cut-off events. [2024-06-28 04:26:07,471 INFO L125 PetriNetUnfolderBase]: For 517805/517805 co-relation queries the response was YES. [2024-06-28 04:26:07,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34250 conditions, 4904 events. 2995/4904 cut-off events. For 517805/517805 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30834 event pairs, 705 based on Foata normal form. 8/4911 useless extension candidates. Maximal degree in co-relation 34079. Up to 4306 conditions per place. [2024-06-28 04:26:07,539 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 66 changer transitions 0/415 dead transitions. [2024-06-28 04:26:07,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 415 transitions, 5434 flow [2024-06-28 04:26:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:26:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:26:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:26:07,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-28 04:26:07,541 INFO L175 Difference]: Start difference. First operand has 367 places, 381 transitions, 4474 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:26:07,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 415 transitions, 5434 flow [2024-06-28 04:26:10,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 415 transitions, 5271 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-28 04:26:10,536 INFO L231 Difference]: Finished difference. Result has 365 places, 381 transitions, 4451 flow [2024-06-28 04:26:10,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4451, PETRI_PLACES=365, PETRI_TRANSITIONS=381} [2024-06-28 04:26:10,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-28 04:26:10,537 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 381 transitions, 4451 flow [2024-06-28 04:26:10,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:10,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:10,537 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] [2024-06-28 04:26:10,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 04:26:10,537 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:10,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1453505535, now seen corresponding path program 5 times [2024-06-28 04:26:10,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965960258] [2024-06-28 04:26:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:13,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965960258] [2024-06-28 04:26:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965960258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:13,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:13,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115656040] [2024-06-28 04:26:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:13,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:13,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:13,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 381 transitions, 4451 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:13,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:13,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:13,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:15,358 INFO L124 PetriNetUnfolderBase]: 3048/4991 cut-off events. [2024-06-28 04:26:15,358 INFO L125 PetriNetUnfolderBase]: For 534511/534511 co-relation queries the response was YES. [2024-06-28 04:26:15,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35390 conditions, 4991 events. 3048/4991 cut-off events. For 534511/534511 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 31443 event pairs, 701 based on Foata normal form. 6/4996 useless extension candidates. Maximal degree in co-relation 35219. Up to 3996 conditions per place. [2024-06-28 04:26:15,433 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 96 changer transitions 0/426 dead transitions. [2024-06-28 04:26:15,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 426 transitions, 5767 flow [2024-06-28 04:26:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 04:26:15,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 04:26:15,434 INFO L175 Difference]: Start difference. First operand has 365 places, 381 transitions, 4451 flow. Second operand 9 states and 162 transitions. [2024-06-28 04:26:15,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 426 transitions, 5767 flow [2024-06-28 04:26:18,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 426 transitions, 5613 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:18,402 INFO L231 Difference]: Finished difference. Result has 366 places, 383 transitions, 4549 flow [2024-06-28 04:26:18,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4549, PETRI_PLACES=366, PETRI_TRANSITIONS=383} [2024-06-28 04:26:18,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-28 04:26:18,420 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 383 transitions, 4549 flow [2024-06-28 04:26:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:18,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:18,420 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] [2024-06-28 04:26:18,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 04:26:18,421 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:18,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash -919601334, now seen corresponding path program 7 times [2024-06-28 04:26:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869966601] [2024-06-28 04:26:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:18,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:21,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:21,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869966601] [2024-06-28 04:26:21,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869966601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:21,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022400389] [2024-06-28 04:26:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:21,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:21,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:21,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 383 transitions, 4549 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:21,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:21,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:21,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:23,332 INFO L124 PetriNetUnfolderBase]: 3135/5116 cut-off events. [2024-06-28 04:26:23,332 INFO L125 PetriNetUnfolderBase]: For 614255/614261 co-relation queries the response was YES. [2024-06-28 04:26:23,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37446 conditions, 5116 events. 3135/5116 cut-off events. For 614255/614261 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 32327 event pairs, 735 based on Foata normal form. 14/5130 useless extension candidates. Maximal degree in co-relation 37275. Up to 4552 conditions per place. [2024-06-28 04:26:23,402 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 69 changer transitions 0/425 dead transitions. [2024-06-28 04:26:23,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 425 transitions, 5813 flow [2024-06-28 04:26:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 04:26:23,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-28 04:26:23,404 INFO L175 Difference]: Start difference. First operand has 366 places, 383 transitions, 4549 flow. Second operand 10 states and 168 transitions. [2024-06-28 04:26:23,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 425 transitions, 5813 flow [2024-06-28 04:26:25,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 425 transitions, 5601 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:25,650 INFO L231 Difference]: Finished difference. Result has 370 places, 385 transitions, 4521 flow [2024-06-28 04:26:25,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4521, PETRI_PLACES=370, PETRI_TRANSITIONS=385} [2024-06-28 04:26:25,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-28 04:26:25,651 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 385 transitions, 4521 flow [2024-06-28 04:26:25,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:25,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:25,651 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] [2024-06-28 04:26:25,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 04:26:25,652 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:25,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1821755335, now seen corresponding path program 6 times [2024-06-28 04:26:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:25,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983659981] [2024-06-28 04:26:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:25,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983659981] [2024-06-28 04:26:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983659981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:28,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:28,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:28,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559070596] [2024-06-28 04:26:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:28,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 385 transitions, 4521 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:30,623 INFO L124 PetriNetUnfolderBase]: 3155/5160 cut-off events. [2024-06-28 04:26:30,623 INFO L125 PetriNetUnfolderBase]: For 609073/609073 co-relation queries the response was YES. [2024-06-28 04:26:30,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37515 conditions, 5160 events. 3155/5160 cut-off events. For 609073/609073 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32667 event pairs, 737 based on Foata normal form. 6/5165 useless extension candidates. Maximal degree in co-relation 37343. Up to 4141 conditions per place. [2024-06-28 04:26:30,698 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 95 changer transitions 0/426 dead transitions. [2024-06-28 04:26:30,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 426 transitions, 5817 flow [2024-06-28 04:26:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 04:26:30,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 04:26:30,700 INFO L175 Difference]: Start difference. First operand has 370 places, 385 transitions, 4521 flow. Second operand 9 states and 159 transitions. [2024-06-28 04:26:30,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 426 transitions, 5817 flow [2024-06-28 04:26:33,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 426 transitions, 5721 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:33,529 INFO L231 Difference]: Finished difference. Result has 373 places, 386 transitions, 4635 flow [2024-06-28 04:26:33,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4635, PETRI_PLACES=373, PETRI_TRANSITIONS=386} [2024-06-28 04:26:33,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-28 04:26:33,535 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 386 transitions, 4635 flow [2024-06-28 04:26:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:33,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:33,535 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] [2024-06-28 04:26:33,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 04:26:33,536 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:33,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1733041364, now seen corresponding path program 8 times [2024-06-28 04:26:33,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:33,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239706626] [2024-06-28 04:26:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:36,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:36,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239706626] [2024-06-28 04:26:36,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239706626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:36,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:36,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876009811] [2024-06-28 04:26:36,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:36,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:36,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:36,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 386 transitions, 4635 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:36,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:36,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:36,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:38,627 INFO L124 PetriNetUnfolderBase]: 3191/5216 cut-off events. [2024-06-28 04:26:38,627 INFO L125 PetriNetUnfolderBase]: For 646415/646421 co-relation queries the response was YES. [2024-06-28 04:26:38,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38127 conditions, 5216 events. 3191/5216 cut-off events. For 646415/646421 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33108 event pairs, 763 based on Foata normal form. 16/5232 useless extension candidates. Maximal degree in co-relation 37953. Up to 4771 conditions per place. [2024-06-28 04:26:38,691 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 63 changer transitions 0/418 dead transitions. [2024-06-28 04:26:38,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 418 transitions, 5601 flow [2024-06-28 04:26:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:26:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:26:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 04:26:38,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 04:26:38,693 INFO L175 Difference]: Start difference. First operand has 373 places, 386 transitions, 4635 flow. Second operand 10 states and 160 transitions. [2024-06-28 04:26:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 418 transitions, 5601 flow [2024-06-28 04:26:41,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 418 transitions, 5435 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:26:41,500 INFO L231 Difference]: Finished difference. Result has 377 places, 387 transitions, 4620 flow [2024-06-28 04:26:41,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4620, PETRI_PLACES=377, PETRI_TRANSITIONS=387} [2024-06-28 04:26:41,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-28 04:26:41,501 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 387 transitions, 4620 flow [2024-06-28 04:26:41,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:41,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:41,501 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] [2024-06-28 04:26:41,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 04:26:41,501 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:41,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1091135695, now seen corresponding path program 7 times [2024-06-28 04:26:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:41,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240448406] [2024-06-28 04:26:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:44,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:44,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240448406] [2024-06-28 04:26:44,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240448406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:44,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:44,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056992850] [2024-06-28 04:26:44,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:44,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:44,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 387 transitions, 4620 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:44,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:44,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:44,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:46,835 INFO L124 PetriNetUnfolderBase]: 3211/5252 cut-off events. [2024-06-28 04:26:46,836 INFO L125 PetriNetUnfolderBase]: For 630105/630105 co-relation queries the response was YES. [2024-06-28 04:26:46,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38290 conditions, 5252 events. 3211/5252 cut-off events. For 630105/630105 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33476 event pairs, 783 based on Foata normal form. 6/5257 useless extension candidates. Maximal degree in co-relation 38115. Up to 4656 conditions per place. [2024-06-28 04:26:46,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 87 changer transitions 0/419 dead transitions. [2024-06-28 04:26:46,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 419 transitions, 5611 flow [2024-06-28 04:26:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:26:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:26:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:26:46,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-28 04:26:46,915 INFO L175 Difference]: Start difference. First operand has 377 places, 387 transitions, 4620 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:26:46,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 419 transitions, 5611 flow [2024-06-28 04:26:49,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 419 transitions, 5480 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 04:26:49,764 INFO L231 Difference]: Finished difference. Result has 378 places, 388 transitions, 4686 flow [2024-06-28 04:26:49,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4686, PETRI_PLACES=378, PETRI_TRANSITIONS=388} [2024-06-28 04:26:49,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-28 04:26:49,765 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 388 transitions, 4686 flow [2024-06-28 04:26:49,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:49,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:49,766 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, 1, 1] [2024-06-28 04:26:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 04:26:49,766 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:49,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1364670664, now seen corresponding path program 9 times [2024-06-28 04:26:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043334576] [2024-06-28 04:26:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:26:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:26:53,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:26:53,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043334576] [2024-06-28 04:26:53,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043334576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:26:53,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:26:53,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:26:53,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411662864] [2024-06-28 04:26:53,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:26:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:26:53,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:26:53,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:26:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:26:53,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:26:53,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 388 transitions, 4686 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:53,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:26:53,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:26:53,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:26:55,140 INFO L124 PetriNetUnfolderBase]: 3239/5294 cut-off events. [2024-06-28 04:26:55,140 INFO L125 PetriNetUnfolderBase]: For 655564/655570 co-relation queries the response was YES. [2024-06-28 04:26:55,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38653 conditions, 5294 events. 3239/5294 cut-off events. For 655564/655570 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33740 event pairs, 765 based on Foata normal form. 14/5308 useless extension candidates. Maximal degree in co-relation 38477. Up to 4809 conditions per place. [2024-06-28 04:26:55,213 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 66 changer transitions 0/425 dead transitions. [2024-06-28 04:26:55,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 425 transitions, 5692 flow [2024-06-28 04:26:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:26:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:26:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-28 04:26:55,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-28 04:26:55,214 INFO L175 Difference]: Start difference. First operand has 378 places, 388 transitions, 4686 flow. Second operand 11 states and 175 transitions. [2024-06-28 04:26:55,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 425 transitions, 5692 flow [2024-06-28 04:26:57,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 425 transitions, 5516 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 04:26:57,868 INFO L231 Difference]: Finished difference. Result has 382 places, 389 transitions, 4668 flow [2024-06-28 04:26:57,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4668, PETRI_PLACES=382, PETRI_TRANSITIONS=389} [2024-06-28 04:26:57,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-28 04:26:57,868 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 389 transitions, 4668 flow [2024-06-28 04:26:57,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:26:57,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:26:57,869 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] [2024-06-28 04:26:57,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 04:26:57,869 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:26:57,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:26:57,869 INFO L85 PathProgramCache]: Analyzing trace with hash 751776927, now seen corresponding path program 8 times [2024-06-28 04:26:57,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:26:57,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130594450] [2024-06-28 04:26:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:26:57,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:26:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130594450] [2024-06-28 04:27:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130594450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439769653] [2024-06-28 04:27:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:00,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:01,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:01,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 389 transitions, 4668 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:01,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:01,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:01,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:02,983 INFO L124 PetriNetUnfolderBase]: 3259/5332 cut-off events. [2024-06-28 04:27:02,983 INFO L125 PetriNetUnfolderBase]: For 650937/650937 co-relation queries the response was YES. [2024-06-28 04:27:03,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38970 conditions, 5332 events. 3259/5332 cut-off events. For 650937/650937 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33740 event pairs, 648 based on Foata normal form. 6/5337 useless extension candidates. Maximal degree in co-relation 38793. Up to 3199 conditions per place. [2024-06-28 04:27:03,065 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 125 changer transitions 0/434 dead transitions. [2024-06-28 04:27:03,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 434 transitions, 6218 flow [2024-06-28 04:27:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 04:27:03,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-28 04:27:03,067 INFO L175 Difference]: Start difference. First operand has 382 places, 389 transitions, 4668 flow. Second operand 9 states and 163 transitions. [2024-06-28 04:27:03,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 434 transitions, 6218 flow [2024-06-28 04:27:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 434 transitions, 6074 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 04:27:05,946 INFO L231 Difference]: Finished difference. Result has 382 places, 390 transitions, 4804 flow [2024-06-28 04:27:05,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4524, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4804, PETRI_PLACES=382, PETRI_TRANSITIONS=390} [2024-06-28 04:27:05,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-28 04:27:05,947 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 390 transitions, 4804 flow [2024-06-28 04:27:05,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:05,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:05,947 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] [2024-06-28 04:27:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 04:27:05,947 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:05,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1175728916, now seen corresponding path program 10 times [2024-06-28 04:27:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:05,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016620004] [2024-06-28 04:27:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:09,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016620004] [2024-06-28 04:27:09,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016620004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:09,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:09,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797186242] [2024-06-28 04:27:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:09,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:09,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:09,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 390 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:09,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:09,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:11,162 INFO L124 PetriNetUnfolderBase]: 3333/5452 cut-off events. [2024-06-28 04:27:11,163 INFO L125 PetriNetUnfolderBase]: For 735319/735325 co-relation queries the response was YES. [2024-06-28 04:27:11,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41069 conditions, 5452 events. 3333/5452 cut-off events. For 735319/735325 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34623 event pairs, 576 based on Foata normal form. 14/5466 useless extension candidates. Maximal degree in co-relation 40891. Up to 4731 conditions per place. [2024-06-28 04:27:11,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 341 selfloop transitions, 86 changer transitions 0/432 dead transitions. [2024-06-28 04:27:11,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 432 transitions, 6072 flow [2024-06-28 04:27:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:27:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:27:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 04:27:11,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-28 04:27:11,239 INFO L175 Difference]: Start difference. First operand has 382 places, 390 transitions, 4804 flow. Second operand 10 states and 166 transitions. [2024-06-28 04:27:11,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 432 transitions, 6072 flow [2024-06-28 04:27:14,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 432 transitions, 5653 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 04:27:14,062 INFO L231 Difference]: Finished difference. Result has 383 places, 392 transitions, 4607 flow [2024-06-28 04:27:14,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4607, PETRI_PLACES=383, PETRI_TRANSITIONS=392} [2024-06-28 04:27:14,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-28 04:27:14,063 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 392 transitions, 4607 flow [2024-06-28 04:27:14,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:14,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:14,063 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] [2024-06-28 04:27:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 04:27:14,063 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:14,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash 752045697, now seen corresponding path program 9 times [2024-06-28 04:27:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061596654] [2024-06-28 04:27:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061596654] [2024-06-28 04:27:17,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061596654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:17,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:17,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989529582] [2024-06-28 04:27:17,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:17,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:17,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:17,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 392 transitions, 4607 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:17,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:17,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:17,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:18,867 INFO L124 PetriNetUnfolderBase]: 3353/5482 cut-off events. [2024-06-28 04:27:18,867 INFO L125 PetriNetUnfolderBase]: For 729735/729735 co-relation queries the response was YES. [2024-06-28 04:27:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40151 conditions, 5482 events. 3353/5482 cut-off events. For 729735/729735 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34751 event pairs, 664 based on Foata normal form. 6/5487 useless extension candidates. Maximal degree in co-relation 39975. Up to 3325 conditions per place. [2024-06-28 04:27:18,950 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 307 selfloop transitions, 123 changer transitions 0/435 dead transitions. [2024-06-28 04:27:18,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 435 transitions, 6166 flow [2024-06-28 04:27:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:27:18,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-28 04:27:18,952 INFO L175 Difference]: Start difference. First operand has 383 places, 392 transitions, 4607 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:27:18,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 435 transitions, 6166 flow [2024-06-28 04:27:22,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 435 transitions, 6026 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:22,590 INFO L231 Difference]: Finished difference. Result has 386 places, 393 transitions, 4732 flow [2024-06-28 04:27:22,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4732, PETRI_PLACES=386, PETRI_TRANSITIONS=393} [2024-06-28 04:27:22,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-28 04:27:22,598 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 393 transitions, 4732 flow [2024-06-28 04:27:22,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:22,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:22,604 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] [2024-06-28 04:27:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 04:27:22,605 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:22,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 494817460, now seen corresponding path program 11 times [2024-06-28 04:27:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446780780] [2024-06-28 04:27:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:25,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:25,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446780780] [2024-06-28 04:27:25,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446780780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:25,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:25,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:25,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070794707] [2024-06-28 04:27:25,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:25,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:25,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:25,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:25,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 393 transitions, 4732 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:25,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:25,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:25,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:27,374 INFO L124 PetriNetUnfolderBase]: 3381/5532 cut-off events. [2024-06-28 04:27:27,374 INFO L125 PetriNetUnfolderBase]: For 756880/756886 co-relation queries the response was YES. [2024-06-28 04:27:27,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40759 conditions, 5532 events. 3381/5532 cut-off events. For 756880/756886 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35337 event pairs, 580 based on Foata normal form. 14/5546 useless extension candidates. Maximal degree in co-relation 40581. Up to 4865 conditions per place. [2024-06-28 04:27:27,462 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 333 selfloop transitions, 86 changer transitions 0/424 dead transitions. [2024-06-28 04:27:27,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 424 transitions, 5676 flow [2024-06-28 04:27:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:27:27,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:27:27,464 INFO L175 Difference]: Start difference. First operand has 386 places, 393 transitions, 4732 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:27:27,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 424 transitions, 5676 flow [2024-06-28 04:27:30,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 424 transitions, 5438 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:30,122 INFO L231 Difference]: Finished difference. Result has 389 places, 394 transitions, 4684 flow [2024-06-28 04:27:30,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4684, PETRI_PLACES=389, PETRI_TRANSITIONS=394} [2024-06-28 04:27:30,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-28 04:27:30,123 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 394 transitions, 4684 flow [2024-06-28 04:27:30,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:30,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:30,123 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] [2024-06-28 04:27:30,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 04:27:30,123 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:30,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1797229872, now seen corresponding path program 12 times [2024-06-28 04:27:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321714421] [2024-06-28 04:27:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:30,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321714421] [2024-06-28 04:27:32,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321714421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:32,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:32,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964355057] [2024-06-28 04:27:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:32,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:32,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 394 transitions, 4684 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:32,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:32,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:32,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:34,535 INFO L124 PetriNetUnfolderBase]: 3442/5631 cut-off events. [2024-06-28 04:27:34,535 INFO L125 PetriNetUnfolderBase]: For 811299/811305 co-relation queries the response was YES. [2024-06-28 04:27:34,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41954 conditions, 5631 events. 3442/5631 cut-off events. For 811299/811305 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36193 event pairs, 591 based on Foata normal form. 14/5645 useless extension candidates. Maximal degree in co-relation 41775. Up to 3821 conditions per place. [2024-06-28 04:27:34,614 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 132 changer transitions 0/436 dead transitions. [2024-06-28 04:27:34,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 436 transitions, 6004 flow [2024-06-28 04:27:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 04:27:34,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 04:27:34,616 INFO L175 Difference]: Start difference. First operand has 389 places, 394 transitions, 4684 flow. Second operand 9 states and 159 transitions. [2024-06-28 04:27:34,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 436 transitions, 6004 flow [2024-06-28 04:27:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 436 transitions, 5828 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:27:37,809 INFO L231 Difference]: Finished difference. Result has 391 places, 396 transitions, 4826 flow [2024-06-28 04:27:37,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4826, PETRI_PLACES=391, PETRI_TRANSITIONS=396} [2024-06-28 04:27:37,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-28 04:27:37,810 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 396 transitions, 4826 flow [2024-06-28 04:27:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:37,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:37,810 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] [2024-06-28 04:27:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 04:27:37,811 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:37,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2129207353, now seen corresponding path program 10 times [2024-06-28 04:27:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354466135] [2024-06-28 04:27:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354466135] [2024-06-28 04:27:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354466135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:40,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:40,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012907981] [2024-06-28 04:27:40,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:40,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:40,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 396 transitions, 4826 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:40,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:40,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:40,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:42,922 INFO L124 PetriNetUnfolderBase]: 3462/5661 cut-off events. [2024-06-28 04:27:42,923 INFO L125 PetriNetUnfolderBase]: For 811436/811436 co-relation queries the response was YES. [2024-06-28 04:27:42,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42649 conditions, 5661 events. 3462/5661 cut-off events. For 811436/811436 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 36119 event pairs, 633 based on Foata normal form. 6/5666 useless extension candidates. Maximal degree in co-relation 42469. Up to 3476 conditions per place. [2024-06-28 04:27:43,013 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 130 changer transitions 0/433 dead transitions. [2024-06-28 04:27:43,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 433 transitions, 6138 flow [2024-06-28 04:27:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 04:27:43,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-28 04:27:43,015 INFO L175 Difference]: Start difference. First operand has 391 places, 396 transitions, 4826 flow. Second operand 9 states and 155 transitions. [2024-06-28 04:27:43,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 433 transitions, 6138 flow [2024-06-28 04:27:46,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 433 transitions, 5988 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:27:46,785 INFO L231 Difference]: Finished difference. Result has 395 places, 397 transitions, 4956 flow [2024-06-28 04:27:46,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4676, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4956, PETRI_PLACES=395, PETRI_TRANSITIONS=397} [2024-06-28 04:27:46,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-28 04:27:46,786 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 397 transitions, 4956 flow [2024-06-28 04:27:46,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:46,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:46,786 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] [2024-06-28 04:27:46,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 04:27:46,787 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:46,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1341556793, now seen corresponding path program 11 times [2024-06-28 04:27:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:46,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132711040] [2024-06-28 04:27:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:46,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:49,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132711040] [2024-06-28 04:27:49,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132711040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:49,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:49,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337154422] [2024-06-28 04:27:49,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:49,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:49,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:49,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 397 transitions, 4956 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:49,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:49,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:49,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:27:51,574 INFO L124 PetriNetUnfolderBase]: 3515/5752 cut-off events. [2024-06-28 04:27:51,574 INFO L125 PetriNetUnfolderBase]: For 871408/871408 co-relation queries the response was YES. [2024-06-28 04:27:51,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44435 conditions, 5752 events. 3515/5752 cut-off events. For 871408/871408 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 37170 event pairs, 889 based on Foata normal form. 6/5757 useless extension candidates. Maximal degree in co-relation 44253. Up to 4893 conditions per place. [2024-06-28 04:27:51,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 102 changer transitions 0/427 dead transitions. [2024-06-28 04:27:51,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 427 transitions, 6218 flow [2024-06-28 04:27:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:27:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:27:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 04:27:51,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 04:27:51,654 INFO L175 Difference]: Start difference. First operand has 395 places, 397 transitions, 4956 flow. Second operand 9 states and 148 transitions. [2024-06-28 04:27:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 427 transitions, 6218 flow [2024-06-28 04:27:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 427 transitions, 6031 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:27:56,753 INFO L231 Difference]: Finished difference. Result has 399 places, 399 transitions, 5049 flow [2024-06-28 04:27:56,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5049, PETRI_PLACES=399, PETRI_TRANSITIONS=399} [2024-06-28 04:27:56,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-28 04:27:56,753 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 399 transitions, 5049 flow [2024-06-28 04:27:56,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:56,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:27:56,754 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] [2024-06-28 04:27:56,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 04:27:56,754 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:27:56,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:27:56,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1484046154, now seen corresponding path program 13 times [2024-06-28 04:27:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:27:56,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077611355] [2024-06-28 04:27:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:27:56,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:27:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:27:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:27:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:27:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077611355] [2024-06-28 04:27:59,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077611355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:27:59,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:27:59,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:27:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136064704] [2024-06-28 04:27:59,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:27:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:27:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:27:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:27:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:27:59,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:27:59,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 399 transitions, 5049 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:27:59,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:27:59,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:27:59,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:01,789 INFO L124 PetriNetUnfolderBase]: 3669/5992 cut-off events. [2024-06-28 04:28:01,789 INFO L125 PetriNetUnfolderBase]: For 1075419/1075425 co-relation queries the response was YES. [2024-06-28 04:28:01,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48669 conditions, 5992 events. 3669/5992 cut-off events. For 1075419/1075425 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39007 event pairs, 853 based on Foata normal form. 16/6008 useless extension candidates. Maximal degree in co-relation 48485. Up to 5131 conditions per place. [2024-06-28 04:28:01,883 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 105 changer transitions 0/435 dead transitions. [2024-06-28 04:28:01,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 435 transitions, 6393 flow [2024-06-28 04:28:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:28:01,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 04:28:01,885 INFO L175 Difference]: Start difference. First operand has 399 places, 399 transitions, 5049 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:28:01,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 435 transitions, 6393 flow [2024-06-28 04:28:07,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 435 transitions, 6217 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:07,023 INFO L231 Difference]: Finished difference. Result has 403 places, 402 transitions, 5182 flow [2024-06-28 04:28:07,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5182, PETRI_PLACES=403, PETRI_TRANSITIONS=402} [2024-06-28 04:28:07,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-28 04:28:07,023 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 402 transitions, 5182 flow [2024-06-28 04:28:07,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:07,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:07,024 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] [2024-06-28 04:28:07,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 04:28:07,024 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:07,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1473900344, now seen corresponding path program 14 times [2024-06-28 04:28:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:07,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529829765] [2024-06-28 04:28:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:10,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:10,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529829765] [2024-06-28 04:28:10,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529829765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:10,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:10,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503063294] [2024-06-28 04:28:10,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:10,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:10,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:10,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:28:10,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 402 transitions, 5182 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:10,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:10,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:28:10,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:12,179 INFO L124 PetriNetUnfolderBase]: 3697/6032 cut-off events. [2024-06-28 04:28:12,179 INFO L125 PetriNetUnfolderBase]: For 1082926/1082932 co-relation queries the response was YES. [2024-06-28 04:28:12,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49359 conditions, 6032 events. 3697/6032 cut-off events. For 1082926/1082932 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39287 event pairs, 953 based on Foata normal form. 14/6046 useless extension candidates. Maximal degree in co-relation 49173. Up to 5508 conditions per place. [2024-06-28 04:28:12,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 62 changer transitions 0/434 dead transitions. [2024-06-28 04:28:12,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 434 transitions, 6448 flow [2024-06-28 04:28:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:28:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:28:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-28 04:28:12,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-28 04:28:12,432 INFO L175 Difference]: Start difference. First operand has 403 places, 402 transitions, 5182 flow. Second operand 10 states and 159 transitions. [2024-06-28 04:28:12,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 434 transitions, 6448 flow [2024-06-28 04:28:17,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 434 transitions, 6304 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 04:28:17,307 INFO L231 Difference]: Finished difference. Result has 408 places, 403 transitions, 5194 flow [2024-06-28 04:28:17,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5194, PETRI_PLACES=408, PETRI_TRANSITIONS=403} [2024-06-28 04:28:17,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-28 04:28:17,308 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 403 transitions, 5194 flow [2024-06-28 04:28:17,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:17,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:17,308 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] [2024-06-28 04:28:17,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 04:28:17,308 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:17,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1710075704, now seen corresponding path program 15 times [2024-06-28 04:28:17,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:17,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027247008] [2024-06-28 04:28:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:17,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027247008] [2024-06-28 04:28:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027247008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:20,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:20,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162315321] [2024-06-28 04:28:20,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:20,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:28:20,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 403 transitions, 5194 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:20,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:20,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:28:20,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:23,037 INFO L124 PetriNetUnfolderBase]: 3725/6066 cut-off events. [2024-06-28 04:28:23,038 INFO L125 PetriNetUnfolderBase]: For 1099069/1099069 co-relation queries the response was YES. [2024-06-28 04:28:23,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49639 conditions, 6066 events. 3725/6066 cut-off events. For 1099069/1099069 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39645 event pairs, 1136 based on Foata normal form. 8/6074 useless extension candidates. Maximal degree in co-relation 49451. Up to 5597 conditions per place. [2024-06-28 04:28:23,127 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 358 selfloop transitions, 68 changer transitions 0/431 dead transitions. [2024-06-28 04:28:23,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 431 transitions, 6182 flow [2024-06-28 04:28:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:28:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:28:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-28 04:28:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073170731707317 [2024-06-28 04:28:23,129 INFO L175 Difference]: Start difference. First operand has 408 places, 403 transitions, 5194 flow. Second operand 10 states and 152 transitions. [2024-06-28 04:28:23,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 431 transitions, 6182 flow [2024-06-28 04:28:28,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 431 transitions, 6046 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 04:28:28,266 INFO L231 Difference]: Finished difference. Result has 412 places, 406 transitions, 5249 flow [2024-06-28 04:28:28,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5249, PETRI_PLACES=412, PETRI_TRANSITIONS=406} [2024-06-28 04:28:28,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-28 04:28:28,267 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 406 transitions, 5249 flow [2024-06-28 04:28:28,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:28,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:28,267 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] [2024-06-28 04:28:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 04:28:28,267 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1473900003, now seen corresponding path program 12 times [2024-06-28 04:28:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:28,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469316787] [2024-06-28 04:28:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469316787] [2024-06-28 04:28:31,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469316787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:31,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:31,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855246803] [2024-06-28 04:28:31,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:31,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:31,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:28:31,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 406 transitions, 5249 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:31,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:31,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:28:31,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:33,398 INFO L124 PetriNetUnfolderBase]: 3712/6057 cut-off events. [2024-06-28 04:28:33,398 INFO L125 PetriNetUnfolderBase]: For 1047285/1047289 co-relation queries the response was YES. [2024-06-28 04:28:33,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48808 conditions, 6057 events. 3712/6057 cut-off events. For 1047285/1047289 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39386 event pairs, 975 based on Foata normal form. 7/6064 useless extension candidates. Maximal degree in co-relation 48618. Up to 5467 conditions per place. [2024-06-28 04:28:33,491 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 90 changer transitions 0/432 dead transitions. [2024-06-28 04:28:33,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 432 transitions, 6233 flow [2024-06-28 04:28:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 04:28:33,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 04:28:33,493 INFO L175 Difference]: Start difference. First operand has 412 places, 406 transitions, 5249 flow. Second operand 9 states and 147 transitions. [2024-06-28 04:28:33,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 432 transitions, 6233 flow [2024-06-28 04:28:39,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 432 transitions, 6106 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:28:39,248 INFO L231 Difference]: Finished difference. Result has 415 places, 406 transitions, 5306 flow [2024-06-28 04:28:39,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5122, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5306, PETRI_PLACES=415, PETRI_TRANSITIONS=406} [2024-06-28 04:28:39,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-28 04:28:39,249 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 406 transitions, 5306 flow [2024-06-28 04:28:39,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:39,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:39,250 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] [2024-06-28 04:28:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-28 04:28:39,250 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:39,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1844946164, now seen corresponding path program 16 times [2024-06-28 04:28:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381217032] [2024-06-28 04:28:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:42,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381217032] [2024-06-28 04:28:42,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381217032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:42,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:42,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:42,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220445240] [2024-06-28 04:28:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:42,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:28:42,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 406 transitions, 5306 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:42,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:42,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:28:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:44,538 INFO L124 PetriNetUnfolderBase]: 3689/6028 cut-off events. [2024-06-28 04:28:44,538 INFO L125 PetriNetUnfolderBase]: For 1013295/1013301 co-relation queries the response was YES. [2024-06-28 04:28:44,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47404 conditions, 6028 events. 3689/6028 cut-off events. For 1013295/1013301 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39282 event pairs, 865 based on Foata normal form. 16/6044 useless extension candidates. Maximal degree in co-relation 47212. Up to 5437 conditions per place. [2024-06-28 04:28:44,635 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 102 changer transitions 0/433 dead transitions. [2024-06-28 04:28:44,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 433 transitions, 6268 flow [2024-06-28 04:28:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:28:44,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 04:28:44,637 INFO L175 Difference]: Start difference. First operand has 415 places, 406 transitions, 5306 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:28:44,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 433 transitions, 6268 flow [2024-06-28 04:28:49,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 433 transitions, 6058 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 04:28:49,113 INFO L231 Difference]: Finished difference. Result has 416 places, 406 transitions, 5305 flow [2024-06-28 04:28:49,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5305, PETRI_PLACES=416, PETRI_TRANSITIONS=406} [2024-06-28 04:28:49,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-28 04:28:49,113 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 406 transitions, 5305 flow [2024-06-28 04:28:49,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:49,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:49,114 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] [2024-06-28 04:28:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-28 04:28:49,114 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:49,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1710086864, now seen corresponding path program 17 times [2024-06-28 04:28:49,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:49,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595983630] [2024-06-28 04:28:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:49,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:28:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:28:52,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:28:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595983630] [2024-06-28 04:28:52,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595983630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:28:52,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:28:52,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:28:52,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022575235] [2024-06-28 04:28:52,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:28:52,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:28:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:28:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:28:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:28:52,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 04:28:52,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 406 transitions, 5305 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:52,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:28:52,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 04:28:52,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:28:54,153 INFO L124 PetriNetUnfolderBase]: 3717/6064 cut-off events. [2024-06-28 04:28:54,153 INFO L125 PetriNetUnfolderBase]: For 1012102/1012108 co-relation queries the response was YES. [2024-06-28 04:28:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47881 conditions, 6064 events. 3717/6064 cut-off events. For 1012102/1012108 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 39519 event pairs, 801 based on Foata normal form. 14/6078 useless extension candidates. Maximal degree in co-relation 47688. Up to 4998 conditions per place. [2024-06-28 04:28:54,255 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 116 changer transitions 0/442 dead transitions. [2024-06-28 04:28:54,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 442 transitions, 6617 flow [2024-06-28 04:28:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:28:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:28:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:28:54,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 04:28:54,257 INFO L175 Difference]: Start difference. First operand has 416 places, 406 transitions, 5305 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:28:54,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 442 transitions, 6617 flow [2024-06-28 04:28:59,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 442 transitions, 6406 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:28:59,689 INFO L231 Difference]: Finished difference. Result has 418 places, 407 transitions, 5360 flow [2024-06-28 04:28:59,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5360, PETRI_PLACES=418, PETRI_TRANSITIONS=407} [2024-06-28 04:28:59,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-28 04:28:59,690 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 407 transitions, 5360 flow [2024-06-28 04:28:59,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:28:59,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:28:59,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:28:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-28 04:28:59,690 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:28:59,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:28:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1240355794, now seen corresponding path program 18 times [2024-06-28 04:28:59,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:28:59,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359688366] [2024-06-28 04:28:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:28:59,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:28:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15