./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.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-rel/safe014_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe014_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe014_rmo.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-eb4cb34-m [2024-06-21 19:35:54,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:35:54,943 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:35:54,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:35:54,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:35:54,983 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:35:54,984 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:35:54,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:35:54,985 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:35:54,988 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:35:54,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:35:54,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:35:54,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:35:54,990 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:35:54,990 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:35:54,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:35:54,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:35:54,990 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:35:54,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:35:54,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:35:54,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:35:54,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:35:54,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:35:54,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:35:54,992 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:35:54,992 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:35:54,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:35:54,993 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:35:54,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:35:54,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:35:54,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:35:54,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:35:54,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:35:54,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:35:54,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:35:54,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:35:54,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:35:54,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:35:54,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:35:54,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:35:54,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:35:54,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:35:54,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:35:54,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:35:55,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:35:55,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:35:55,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:35:55,248 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:35:55,248 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:35:55,249 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-21 19:35:56,474 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:35:56,738 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:35:56,738 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_rmo.oepc.i [2024-06-21 19:35:56,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d933993cf/02ea8124efc74b289d31f053c2b41883/FLAGa2540c286 [2024-06-21 19:35:56,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d933993cf/02ea8124efc74b289d31f053c2b41883 [2024-06-21 19:35:56,766 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:35:56,766 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:35:56,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe014_rmo.oepc.yml/witness.yml [2024-06-21 19:35:56,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:35:56,848 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:35:56,848 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:35:56,849 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:35:56,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:35:56,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:35:56" (1/2) ... [2024-06-21 19:35:56,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f20c22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:35:56, skipping insertion in model container [2024-06-21 19:35:56,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:35:56" (1/2) ... [2024-06-21 19:35:56,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b8dcde0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:35:56, skipping insertion in model container [2024-06-21 19:35:56,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:35:56" (2/2) ... [2024-06-21 19:35:56,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f20c22 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:56, skipping insertion in model container [2024-06-21 19:35:56,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:35:56" (2/2) ... [2024-06-21 19:35:56,857 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:35:56,879 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:35:56,881 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd0 >= 0LL && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:35:56,881 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd0 >= 0LL && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:35:56,881 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd0 >= 0LL && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) + (long long )y$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )y$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$flush_delayed) - (long long )y$mem_tmp >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$read_delayed >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y$mem_tmp) - (long long )y$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )y$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )y$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:35:56,881 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:35:56,882 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-21 19:35:56,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:35:57,200 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:35:57,209 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:35:57,374 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:35:57,417 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:35:57,418 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57 WrapperNode [2024-06-21 19:35:57,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:35:57,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:35:57,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:35:57,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:35:57,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,513 INFO L138 Inliner]: procedures = 175, calls = 59, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 145 [2024-06-21 19:35:57,516 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:35:57,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:35:57,517 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:35:57,517 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:35:57,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,535 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,557 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 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]. [2024-06-21 19:35:57,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,602 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:35:57,617 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:35:57,617 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:35:57,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:35:57,618 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (1/1) ... [2024-06-21 19:35:57,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:35:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:35:57,674 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) [2024-06-21 19:35:57,708 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 [2024-06-21 19:35:57,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:35:57,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:35:57,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:35:57,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:35:57,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:35:57,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:35:57,750 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:35:57,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:35:57,751 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:35:57,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:35:57,751 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:35:57,751 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:35:57,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:35:57,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:35:57,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:35:57,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:35:57,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:35:57,755 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:35:57,965 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:35:57,968 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:35:58,672 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:35:58,673 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:35:59,015 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:35:59,015 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:35:59,016 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:35:59 BoogieIcfgContainer [2024-06-21 19:35:59,017 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:35:59,019 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:35:59,020 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:35:59,023 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:35:59,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:35:56" (1/4) ... [2024-06-21 19:35:59,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890cddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:35:59, skipping insertion in model container [2024-06-21 19:35:59,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:35:56" (2/4) ... [2024-06-21 19:35:59,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890cddb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:35:59, skipping insertion in model container [2024-06-21 19:35:59,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:35:57" (3/4) ... [2024-06-21 19:35:59,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890cddb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:35:59, skipping insertion in model container [2024-06-21 19:35:59,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:35:59" (4/4) ... [2024-06-21 19:35:59,029 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_rmo.oepc.i [2024-06-21 19:35:59,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:35:59,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:35:59,051 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:35:59,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:35:59,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:35:59,210 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:35:59,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:35:59,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:35:59,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:35:59,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:35:59,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:35:59,244 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;@5f7c5077, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:35:59,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:35:59,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:35:59,251 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:35:59,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:35:59,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:59,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:35:59,253 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)] === [2024-06-21 19:35:59,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash 517978969, now seen corresponding path program 1 times [2024-06-21 19:35:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:59,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660606783] [2024-06-21 19:35:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:59,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:01,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660606783] [2024-06-21 19:36:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660606783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:01,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:01,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:36:01,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908146033] [2024-06-21 19:36:01,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:36:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:36:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:36:01,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:36:01,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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) [2024-06-21 19:36:01,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:36:01,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:01,736 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-21 19:36:01,737 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 19:36:01,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5957 event pairs, 479 based on Foata normal form. 1/1207 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-21 19:36:01,748 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 19:36:01,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-21 19:36:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:36:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:36:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 19:36:01,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 19:36:01,758 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-21 19:36:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-21 19:36:01,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:36:01,762 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 19:36:01,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 19:36:01,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 19:36:01,766 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 19:36:01,766 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) [2024-06-21 19:36:01,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:01,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:01,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:36:01,767 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)] === [2024-06-21 19:36:01,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -438376424, now seen corresponding path program 1 times [2024-06-21 19:36:01,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:01,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357672194] [2024-06-21 19:36:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:01,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:03,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:03,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357672194] [2024-06-21 19:36:03,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357672194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:03,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:03,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:36:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506466547] [2024-06-21 19:36:03,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:36:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:03,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:36:03,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:36:03,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:36:03,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-06-21 19:36:03,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:03,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:36:03,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:04,221 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-21 19:36:04,222 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-21 19:36:04,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5914 event pairs, 369 based on Foata normal form. 6/1232 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-21 19:36:04,229 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 19:36:04,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-21 19:36:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:36:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:36:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 19:36:04,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 19:36:04,231 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-21 19:36:04,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-21 19:36:04,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:36:04,233 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 19:36:04,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 19:36:04,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 19:36:04,234 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 19:36:04,235 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) [2024-06-21 19:36:04,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:04,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:04,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:36:04,235 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)] === [2024-06-21 19:36:04,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1324824444, now seen corresponding path program 1 times [2024-06-21 19:36:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:04,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259961863] [2024-06-21 19:36:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:08,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259961863] [2024-06-21 19:36:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259961863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:08,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:08,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:36:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259719580] [2024-06-21 19:36:08,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:08,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:36:08,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:36:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:36:08,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:36:08,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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) [2024-06-21 19:36:08,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:08,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:36:08,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:08,618 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-21 19:36:08,618 INFO L125 PetriNetUnfolderBase]: For 848/863 co-relation queries the response was YES. [2024-06-21 19:36:08,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 848/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7195 event pairs, 305 based on Foata normal form. 12/1530 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-21 19:36:08,626 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 19:36:08,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-21 19:36:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:36:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:36:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 19:36:08,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 19:36:08,629 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-21 19:36:08,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-21 19:36:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 19:36:08,631 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 19:36:08,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 19:36:08,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 19:36:08,632 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 19:36:08,632 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) [2024-06-21 19:36:08,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:08,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:36:08,633 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)] === [2024-06-21 19:36:08,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1745008725, now seen corresponding path program 1 times [2024-06-21 19:36:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827634757] [2024-06-21 19:36:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:10,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827634757] [2024-06-21 19:36:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827634757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:10,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:36:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827829357] [2024-06-21 19:36:10,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:36:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:36:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:36:10,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:10,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:10,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:10,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:10,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:11,244 INFO L124 PetriNetUnfolderBase]: 1115/1730 cut-off events. [2024-06-21 19:36:11,245 INFO L125 PetriNetUnfolderBase]: For 1747/1750 co-relation queries the response was YES. [2024-06-21 19:36:11,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1730 events. 1115/1730 cut-off events. For 1747/1750 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8093 event pairs, 391 based on Foata normal form. 6/1727 useless extension candidates. Maximal degree in co-relation 4847. Up to 1601 conditions per place. [2024-06-21 19:36:11,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-21 19:36:11,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 432 flow [2024-06-21 19:36:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:36:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:36:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 19:36:11,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 19:36:11,256 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 96 transitions. [2024-06-21 19:36:11,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 432 flow [2024-06-21 19:36:11,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 397 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 19:36:11,261 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 255 flow [2024-06-21 19:36:11,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2024-06-21 19:36:11,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 19:36:11,263 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 255 flow [2024-06-21 19:36:11,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:11,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:11,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:11,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:36:11,264 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)] === [2024-06-21 19:36:11,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1740050252, now seen corresponding path program 1 times [2024-06-21 19:36:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:11,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253652752] [2024-06-21 19:36:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:13,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:13,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253652752] [2024-06-21 19:36:13,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253652752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:13,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:13,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:36:13,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109695399] [2024-06-21 19:36:13,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:13,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:36:13,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:36:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:36:13,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:13,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:13,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:13,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:13,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:13,925 INFO L124 PetriNetUnfolderBase]: 1105/1726 cut-off events. [2024-06-21 19:36:13,926 INFO L125 PetriNetUnfolderBase]: For 2550/2565 co-relation queries the response was YES. [2024-06-21 19:36:13,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 1726 events. 1105/1726 cut-off events. For 2550/2565 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8140 event pairs, 423 based on Foata normal form. 14/1733 useless extension candidates. Maximal degree in co-relation 5356. Up to 1593 conditions per place. [2024-06-21 19:36:13,940 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-21 19:36:13,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 448 flow [2024-06-21 19:36:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:36:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:36:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 19:36:13,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 19:36:13,945 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 255 flow. Second operand 5 states and 94 transitions. [2024-06-21 19:36:13,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 448 flow [2024-06-21 19:36:13,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 446 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:36:13,950 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 292 flow [2024-06-21 19:36:13,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-21 19:36:13,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 19:36:13,951 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 292 flow [2024-06-21 19:36:13,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:13,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:13,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:13,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:36:13,952 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)] === [2024-06-21 19:36:13,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 774114581, now seen corresponding path program 1 times [2024-06-21 19:36:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157244901] [2024-06-21 19:36:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157244901] [2024-06-21 19:36:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157244901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958139061] [2024-06-21 19:36:17,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:17,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:17,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:17,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:17,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:17,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:17,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:17,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:17,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:18,693 INFO L124 PetriNetUnfolderBase]: 1279/2007 cut-off events. [2024-06-21 19:36:18,694 INFO L125 PetriNetUnfolderBase]: For 3624/3630 co-relation queries the response was YES. [2024-06-21 19:36:18,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 2007 events. 1279/2007 cut-off events. For 3624/3630 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9728 event pairs, 372 based on Foata normal form. 11/2015 useless extension candidates. Maximal degree in co-relation 6494. Up to 1726 conditions per place. [2024-06-21 19:36:18,709 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 94 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-21 19:36:18,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 142 transitions, 933 flow [2024-06-21 19:36:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:36:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:36:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 19:36:18,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 19:36:18,713 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 292 flow. Second operand 10 states and 191 transitions. [2024-06-21 19:36:18,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 142 transitions, 933 flow [2024-06-21 19:36:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 142 transitions, 915 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:36:18,723 INFO L231 Difference]: Finished difference. Result has 71 places, 88 transitions, 607 flow [2024-06-21 19:36:18,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=607, PETRI_PLACES=71, PETRI_TRANSITIONS=88} [2024-06-21 19:36:18,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 19:36:18,726 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 88 transitions, 607 flow [2024-06-21 19:36:18,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:18,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:18,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:18,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:36:18,727 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)] === [2024-06-21 19:36:18,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1414517695, now seen corresponding path program 2 times [2024-06-21 19:36:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:18,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792168437] [2024-06-21 19:36:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:18,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:23,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792168437] [2024-06-21 19:36:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792168437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189016776] [2024-06-21 19:36:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:23,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:23,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:23,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 88 transitions, 607 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:23,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:23,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:23,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:25,004 INFO L124 PetriNetUnfolderBase]: 1399/2197 cut-off events. [2024-06-21 19:36:25,004 INFO L125 PetriNetUnfolderBase]: For 7724/7735 co-relation queries the response was YES. [2024-06-21 19:36:25,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8884 conditions, 2197 events. 1399/2197 cut-off events. For 7724/7735 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10785 event pairs, 366 based on Foata normal form. 7/2196 useless extension candidates. Maximal degree in co-relation 8851. Up to 1915 conditions per place. [2024-06-21 19:36:25,042 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 96 selfloop transitions, 48 changer transitions 0/149 dead transitions. [2024-06-21 19:36:25,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 149 transitions, 1231 flow [2024-06-21 19:36:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:36:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:36:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 19:36:25,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 19:36:25,048 INFO L175 Difference]: Start difference. First operand has 71 places, 88 transitions, 607 flow. Second operand 8 states and 153 transitions. [2024-06-21 19:36:25,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 149 transitions, 1231 flow [2024-06-21 19:36:25,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 149 transitions, 1203 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 19:36:25,064 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 932 flow [2024-06-21 19:36:25,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=932, PETRI_PLACES=79, PETRI_TRANSITIONS=113} [2024-06-21 19:36:25,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 19:36:25,066 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 932 flow [2024-06-21 19:36:25,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:25,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:25,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:25,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:36:25,066 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)] === [2024-06-21 19:36:25,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash -759427913, now seen corresponding path program 3 times [2024-06-21 19:36:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:25,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136543306] [2024-06-21 19:36:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:25,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:29,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136543306] [2024-06-21 19:36:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136543306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053612170] [2024-06-21 19:36:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:29,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:29,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:29,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:29,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 113 transitions, 932 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:29,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:29,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:29,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:30,578 INFO L124 PetriNetUnfolderBase]: 1487/2341 cut-off events. [2024-06-21 19:36:30,579 INFO L125 PetriNetUnfolderBase]: For 11134/11143 co-relation queries the response was YES. [2024-06-21 19:36:30,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10521 conditions, 2341 events. 1487/2341 cut-off events. For 11134/11143 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11560 event pairs, 432 based on Foata normal form. 4/2329 useless extension candidates. Maximal degree in co-relation 10484. Up to 1886 conditions per place. [2024-06-21 19:36:30,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 55 changer transitions 0/187 dead transitions. [2024-06-21 19:36:30,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 187 transitions, 1834 flow [2024-06-21 19:36:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:36:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:36:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 19:36:30,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 19:36:30,611 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 932 flow. Second operand 7 states and 138 transitions. [2024-06-21 19:36:30,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 187 transitions, 1834 flow [2024-06-21 19:36:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 187 transitions, 1806 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-21 19:36:30,631 INFO L231 Difference]: Finished difference. Result has 89 places, 150 transitions, 1473 flow [2024-06-21 19:36:30,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1473, PETRI_PLACES=89, PETRI_TRANSITIONS=150} [2024-06-21 19:36:30,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 19:36:30,633 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 150 transitions, 1473 flow [2024-06-21 19:36:30,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:30,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:30,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:30,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:36:30,634 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)] === [2024-06-21 19:36:30,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash -67507913, now seen corresponding path program 4 times [2024-06-21 19:36:30,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:30,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55027745] [2024-06-21 19:36:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:30,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55027745] [2024-06-21 19:36:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55027745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:33,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:33,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:33,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618638549] [2024-06-21 19:36:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:33,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:33,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 150 transitions, 1473 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:33,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:33,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:33,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:34,997 INFO L124 PetriNetUnfolderBase]: 1482/2314 cut-off events. [2024-06-21 19:36:34,998 INFO L125 PetriNetUnfolderBase]: For 15093/15111 co-relation queries the response was YES. [2024-06-21 19:36:35,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11666 conditions, 2314 events. 1482/2314 cut-off events. For 15093/15111 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11259 event pairs, 438 based on Foata normal form. 5/2294 useless extension candidates. Maximal degree in co-relation 11621. Up to 1883 conditions per place. [2024-06-21 19:36:35,018 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 67 changer transitions 0/189 dead transitions. [2024-06-21 19:36:35,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 189 transitions, 2109 flow [2024-06-21 19:36:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:36:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:36:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 19:36:35,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:36:35,020 INFO L175 Difference]: Start difference. First operand has 89 places, 150 transitions, 1473 flow. Second operand 7 states and 133 transitions. [2024-06-21 19:36:35,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 189 transitions, 2109 flow [2024-06-21 19:36:35,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 189 transitions, 2070 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 19:36:35,045 INFO L231 Difference]: Finished difference. Result has 98 places, 162 transitions, 1798 flow [2024-06-21 19:36:35,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1798, PETRI_PLACES=98, PETRI_TRANSITIONS=162} [2024-06-21 19:36:35,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 19:36:35,046 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 162 transitions, 1798 flow [2024-06-21 19:36:35,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:35,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:35,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:35,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:36:35,046 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)] === [2024-06-21 19:36:35,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash -689740291, now seen corresponding path program 5 times [2024-06-21 19:36:35,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:35,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408147582] [2024-06-21 19:36:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:36,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:36,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408147582] [2024-06-21 19:36:36,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408147582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:36,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:36,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:36,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957088351] [2024-06-21 19:36:36,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:36,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:36,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:36,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:36,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 162 transitions, 1798 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:36,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:36,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:36,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:38,414 INFO L124 PetriNetUnfolderBase]: 1757/2759 cut-off events. [2024-06-21 19:36:38,414 INFO L125 PetriNetUnfolderBase]: For 20737/20737 co-relation queries the response was YES. [2024-06-21 19:36:38,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14953 conditions, 2759 events. 1757/2759 cut-off events. For 20737/20737 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13988 event pairs, 391 based on Foata normal form. 11/2767 useless extension candidates. Maximal degree in co-relation 14901. Up to 2020 conditions per place. [2024-06-21 19:36:38,439 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 126 selfloop transitions, 134 changer transitions 0/265 dead transitions. [2024-06-21 19:36:38,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 265 transitions, 3204 flow [2024-06-21 19:36:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:36:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:36:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 19:36:38,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 19:36:38,442 INFO L175 Difference]: Start difference. First operand has 98 places, 162 transitions, 1798 flow. Second operand 10 states and 199 transitions. [2024-06-21 19:36:38,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 265 transitions, 3204 flow [2024-06-21 19:36:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 265 transitions, 3161 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-21 19:36:38,476 INFO L231 Difference]: Finished difference. Result has 110 places, 208 transitions, 2721 flow [2024-06-21 19:36:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2721, PETRI_PLACES=110, PETRI_TRANSITIONS=208} [2024-06-21 19:36:38,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 19:36:38,479 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 208 transitions, 2721 flow [2024-06-21 19:36:38,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:38,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:38,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:38,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:36:38,480 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)] === [2024-06-21 19:36:38,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash -952355871, now seen corresponding path program 6 times [2024-06-21 19:36:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:38,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767492139] [2024-06-21 19:36:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:38,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767492139] [2024-06-21 19:36:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767492139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:41,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662885906] [2024-06-21 19:36:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:41,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:41,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 208 transitions, 2721 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:41,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:41,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:41,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:42,886 INFO L124 PetriNetUnfolderBase]: 1809/2823 cut-off events. [2024-06-21 19:36:42,887 INFO L125 PetriNetUnfolderBase]: For 28875/28875 co-relation queries the response was YES. [2024-06-21 19:36:42,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17659 conditions, 2823 events. 1809/2823 cut-off events. For 28875/28875 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14251 event pairs, 423 based on Foata normal form. 2/2817 useless extension candidates. Maximal degree in co-relation 17601. Up to 2229 conditions per place. [2024-06-21 19:36:42,987 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 164 selfloop transitions, 107 changer transitions 0/276 dead transitions. [2024-06-21 19:36:42,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 276 transitions, 3798 flow [2024-06-21 19:36:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:36:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:36:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 19:36:42,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:36:42,990 INFO L175 Difference]: Start difference. First operand has 110 places, 208 transitions, 2721 flow. Second operand 10 states and 180 transitions. [2024-06-21 19:36:42,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 276 transitions, 3798 flow [2024-06-21 19:36:43,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 276 transitions, 3685 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:36:43,034 INFO L231 Difference]: Finished difference. Result has 115 places, 228 transitions, 3116 flow [2024-06-21 19:36:43,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3116, PETRI_PLACES=115, PETRI_TRANSITIONS=228} [2024-06-21 19:36:43,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 19:36:43,035 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 228 transitions, 3116 flow [2024-06-21 19:36:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:43,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:43,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:36:43,036 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)] === [2024-06-21 19:36:43,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:43,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1446045419, now seen corresponding path program 1 times [2024-06-21 19:36:43,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:43,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569171812] [2024-06-21 19:36:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:43,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:45,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:45,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569171812] [2024-06-21 19:36:45,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569171812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:45,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:45,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:36:45,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544116428] [2024-06-21 19:36:45,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:45,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:36:45,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:36:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:36:45,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:45,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 228 transitions, 3116 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:45,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:45,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:45,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:46,652 INFO L124 PetriNetUnfolderBase]: 1821/2886 cut-off events. [2024-06-21 19:36:46,652 INFO L125 PetriNetUnfolderBase]: For 31161/31255 co-relation queries the response was YES. [2024-06-21 19:36:46,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17974 conditions, 2886 events. 1821/2886 cut-off events. For 31161/31255 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15032 event pairs, 406 based on Foata normal form. 75/2947 useless extension candidates. Maximal degree in co-relation 17915. Up to 2473 conditions per place. [2024-06-21 19:36:46,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 47 changer transitions 0/255 dead transitions. [2024-06-21 19:36:46,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 255 transitions, 3757 flow [2024-06-21 19:36:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:36:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:36:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 19:36:46,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:36:46,691 INFO L175 Difference]: Start difference. First operand has 115 places, 228 transitions, 3116 flow. Second operand 7 states and 119 transitions. [2024-06-21 19:36:46,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 255 transitions, 3757 flow [2024-06-21 19:36:46,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 255 transitions, 3591 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 19:36:46,759 INFO L231 Difference]: Finished difference. Result has 118 places, 231 transitions, 3093 flow [2024-06-21 19:36:46,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3093, PETRI_PLACES=118, PETRI_TRANSITIONS=231} [2024-06-21 19:36:46,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 19:36:46,760 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 231 transitions, 3093 flow [2024-06-21 19:36:46,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:46,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:46,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:36:46,762 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)] === [2024-06-21 19:36:46,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1324994504, now seen corresponding path program 1 times [2024-06-21 19:36:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:46,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787334607] [2024-06-21 19:36:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:46,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:51,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787334607] [2024-06-21 19:36:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787334607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:51,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:36:51,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567848746] [2024-06-21 19:36:51,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:51,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:36:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:36:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:36:51,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:51,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 231 transitions, 3093 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:51,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:51,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:51,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:52,761 INFO L124 PetriNetUnfolderBase]: 1801/2844 cut-off events. [2024-06-21 19:36:52,762 INFO L125 PetriNetUnfolderBase]: For 31216/31227 co-relation queries the response was YES. [2024-06-21 19:36:52,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17810 conditions, 2844 events. 1801/2844 cut-off events. For 31216/31227 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14588 event pairs, 420 based on Foata normal form. 11/2847 useless extension candidates. Maximal degree in co-relation 17751. Up to 2474 conditions per place. [2024-06-21 19:36:52,791 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 79 changer transitions 0/265 dead transitions. [2024-06-21 19:36:52,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 265 transitions, 3776 flow [2024-06-21 19:36:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:36:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:36:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:36:52,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:36:52,793 INFO L175 Difference]: Start difference. First operand has 118 places, 231 transitions, 3093 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:36:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 265 transitions, 3776 flow [2024-06-21 19:36:52,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 265 transitions, 3643 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 19:36:52,853 INFO L231 Difference]: Finished difference. Result has 122 places, 231 transitions, 3144 flow [2024-06-21 19:36:52,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3144, PETRI_PLACES=122, PETRI_TRANSITIONS=231} [2024-06-21 19:36:52,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 19:36:52,854 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 231 transitions, 3144 flow [2024-06-21 19:36:52,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:52,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:52,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:36:52,855 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)] === [2024-06-21 19:36:52,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 904095604, now seen corresponding path program 2 times [2024-06-21 19:36:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:52,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640549953] [2024-06-21 19:36:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:58,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640549953] [2024-06-21 19:36:58,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640549953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:58,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:58,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:36:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137978725] [2024-06-21 19:36:58,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:58,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:36:58,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:36:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:36:58,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:58,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 231 transitions, 3144 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:58,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:58,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:58,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:59,706 INFO L124 PetriNetUnfolderBase]: 1823/2883 cut-off events. [2024-06-21 19:36:59,707 INFO L125 PetriNetUnfolderBase]: For 34939/34972 co-relation queries the response was YES. [2024-06-21 19:36:59,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18226 conditions, 2883 events. 1823/2883 cut-off events. For 34939/34972 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14854 event pairs, 467 based on Foata normal form. 9/2878 useless extension candidates. Maximal degree in co-relation 18167. Up to 2250 conditions per place. [2024-06-21 19:36:59,729 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 106 changer transitions 0/271 dead transitions. [2024-06-21 19:36:59,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 271 transitions, 3998 flow [2024-06-21 19:36:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:36:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:36:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:36:59,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 19:36:59,732 INFO L175 Difference]: Start difference. First operand has 122 places, 231 transitions, 3144 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:36:59,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 271 transitions, 3998 flow [2024-06-21 19:36:59,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 271 transitions, 3862 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 19:36:59,775 INFO L231 Difference]: Finished difference. Result has 123 places, 237 transitions, 3329 flow [2024-06-21 19:36:59,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3329, PETRI_PLACES=123, PETRI_TRANSITIONS=237} [2024-06-21 19:36:59,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 19:36:59,776 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 237 transitions, 3329 flow [2024-06-21 19:36:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:59,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:59,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:59,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:36:59,777 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)] === [2024-06-21 19:36:59,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 953432434, now seen corresponding path program 3 times [2024-06-21 19:36:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:59,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608179515] [2024-06-21 19:36:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:03,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:03,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608179515] [2024-06-21 19:37:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608179515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:03,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:03,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030580832] [2024-06-21 19:37:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:03,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:03,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:03,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:03,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 237 transitions, 3329 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:03,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:03,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:03,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:05,143 INFO L124 PetriNetUnfolderBase]: 1897/3023 cut-off events. [2024-06-21 19:37:05,143 INFO L125 PetriNetUnfolderBase]: For 40953/40994 co-relation queries the response was YES. [2024-06-21 19:37:05,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19604 conditions, 3023 events. 1897/3023 cut-off events. For 40953/40994 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15978 event pairs, 469 based on Foata normal form. 17/3026 useless extension candidates. Maximal degree in co-relation 19545. Up to 2320 conditions per place. [2024-06-21 19:37:05,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 162 selfloop transitions, 119 changer transitions 0/286 dead transitions. [2024-06-21 19:37:05,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 286 transitions, 4481 flow [2024-06-21 19:37:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:37:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:37:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 19:37:05,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 19:37:05,171 INFO L175 Difference]: Start difference. First operand has 123 places, 237 transitions, 3329 flow. Second operand 7 states and 140 transitions. [2024-06-21 19:37:05,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 286 transitions, 4481 flow [2024-06-21 19:37:05,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 286 transitions, 4197 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 19:37:05,221 INFO L231 Difference]: Finished difference. Result has 125 places, 255 transitions, 3658 flow [2024-06-21 19:37:05,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3077, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3658, PETRI_PLACES=125, PETRI_TRANSITIONS=255} [2024-06-21 19:37:05,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 19:37:05,223 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 255 transitions, 3658 flow [2024-06-21 19:37:05,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:05,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:05,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:05,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:37:05,223 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)] === [2024-06-21 19:37:05,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1149755414, now seen corresponding path program 4 times [2024-06-21 19:37:05,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:05,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380683032] [2024-06-21 19:37:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:05,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380683032] [2024-06-21 19:37:09,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380683032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:09,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:09,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267242398] [2024-06-21 19:37:09,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:09,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:09,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:09,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:09,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 255 transitions, 3658 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:09,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:09,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:09,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:11,108 INFO L124 PetriNetUnfolderBase]: 1889/2985 cut-off events. [2024-06-21 19:37:11,108 INFO L125 PetriNetUnfolderBase]: For 42716/42736 co-relation queries the response was YES. [2024-06-21 19:37:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19720 conditions, 2985 events. 1889/2985 cut-off events. For 42716/42736 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15484 event pairs, 483 based on Foata normal form. 8/2957 useless extension candidates. Maximal degree in co-relation 19658. Up to 2312 conditions per place. [2024-06-21 19:37:11,132 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 153 selfloop transitions, 129 changer transitions 0/287 dead transitions. [2024-06-21 19:37:11,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 287 transitions, 4407 flow [2024-06-21 19:37:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 19:37:11,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:37:11,134 INFO L175 Difference]: Start difference. First operand has 125 places, 255 transitions, 3658 flow. Second operand 8 states and 147 transitions. [2024-06-21 19:37:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 287 transitions, 4407 flow [2024-06-21 19:37:11,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 287 transitions, 4217 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 19:37:11,192 INFO L231 Difference]: Finished difference. Result has 130 places, 255 transitions, 3737 flow [2024-06-21 19:37:11,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3737, PETRI_PLACES=130, PETRI_TRANSITIONS=255} [2024-06-21 19:37:11,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 19:37:11,192 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 255 transitions, 3737 flow [2024-06-21 19:37:11,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:11,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:11,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:11,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:37:11,193 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)] === [2024-06-21 19:37:11,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1877459024, now seen corresponding path program 5 times [2024-06-21 19:37:11,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:11,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738142968] [2024-06-21 19:37:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:11,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:14,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738142968] [2024-06-21 19:37:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738142968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173828302] [2024-06-21 19:37:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:14,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:14,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 255 transitions, 3737 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:14,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:14,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:14,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:15,621 INFO L124 PetriNetUnfolderBase]: 1881/3003 cut-off events. [2024-06-21 19:37:15,622 INFO L125 PetriNetUnfolderBase]: For 47415/47516 co-relation queries the response was YES. [2024-06-21 19:37:15,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19872 conditions, 3003 events. 1881/3003 cut-off events. For 47415/47516 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15862 event pairs, 472 based on Foata normal form. 47/3025 useless extension candidates. Maximal degree in co-relation 19809. Up to 2304 conditions per place. [2024-06-21 19:37:15,658 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 123 changer transitions 0/285 dead transitions. [2024-06-21 19:37:15,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 285 transitions, 4525 flow [2024-06-21 19:37:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:37:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:37:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 19:37:15,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 19:37:15,661 INFO L175 Difference]: Start difference. First operand has 130 places, 255 transitions, 3737 flow. Second operand 7 states and 131 transitions. [2024-06-21 19:37:15,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 285 transitions, 4525 flow [2024-06-21 19:37:15,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 285 transitions, 4217 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 19:37:15,758 INFO L231 Difference]: Finished difference. Result has 131 places, 258 transitions, 3744 flow [2024-06-21 19:37:15,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3744, PETRI_PLACES=131, PETRI_TRANSITIONS=258} [2024-06-21 19:37:15,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 19:37:15,759 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 258 transitions, 3744 flow [2024-06-21 19:37:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:15,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:15,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:15,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:37:15,760 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)] === [2024-06-21 19:37:15,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash 115058678, now seen corresponding path program 6 times [2024-06-21 19:37:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:15,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64162499] [2024-06-21 19:37:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:17,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:17,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64162499] [2024-06-21 19:37:17,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64162499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:17,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:17,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083955189] [2024-06-21 19:37:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:17,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:17,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:17,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:17,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 258 transitions, 3744 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:17,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:17,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:17,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:19,573 INFO L124 PetriNetUnfolderBase]: 1865/2972 cut-off events. [2024-06-21 19:37:19,573 INFO L125 PetriNetUnfolderBase]: For 47268/47268 co-relation queries the response was YES. [2024-06-21 19:37:19,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19690 conditions, 2972 events. 1865/2972 cut-off events. For 47268/47268 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15579 event pairs, 411 based on Foata normal form. 12/2981 useless extension candidates. Maximal degree in co-relation 19626. Up to 2209 conditions per place. [2024-06-21 19:37:19,602 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 161 selfloop transitions, 147 changer transitions 0/313 dead transitions. [2024-06-21 19:37:19,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 313 transitions, 4799 flow [2024-06-21 19:37:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:37:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:37:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 19:37:19,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:37:19,604 INFO L175 Difference]: Start difference. First operand has 131 places, 258 transitions, 3744 flow. Second operand 10 states and 195 transitions. [2024-06-21 19:37:19,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 313 transitions, 4799 flow [2024-06-21 19:37:19,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 313 transitions, 4652 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 19:37:19,703 INFO L231 Difference]: Finished difference. Result has 140 places, 266 transitions, 4178 flow [2024-06-21 19:37:19,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4178, PETRI_PLACES=140, PETRI_TRANSITIONS=266} [2024-06-21 19:37:19,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 19:37:19,704 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 266 transitions, 4178 flow [2024-06-21 19:37:19,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:19,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:19,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:37:19,705 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)] === [2024-06-21 19:37:19,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:19,706 INFO L85 PathProgramCache]: Analyzing trace with hash 541745600, now seen corresponding path program 7 times [2024-06-21 19:37:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:19,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352157986] [2024-06-21 19:37:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:19,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352157986] [2024-06-21 19:37:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352157986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:22,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:22,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:22,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183520967] [2024-06-21 19:37:22,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:22,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:22,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:22,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 266 transitions, 4178 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:22,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:22,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:22,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:24,190 INFO L124 PetriNetUnfolderBase]: 1914/3066 cut-off events. [2024-06-21 19:37:24,190 INFO L125 PetriNetUnfolderBase]: For 55428/55438 co-relation queries the response was YES. [2024-06-21 19:37:24,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20857 conditions, 3066 events. 1914/3066 cut-off events. For 55428/55438 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16416 event pairs, 436 based on Foata normal form. 10/3072 useless extension candidates. Maximal degree in co-relation 20790. Up to 2328 conditions per place. [2024-06-21 19:37:24,229 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 150 changer transitions 0/326 dead transitions. [2024-06-21 19:37:24,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 326 transitions, 5325 flow [2024-06-21 19:37:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:37:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:37:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 19:37:24,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 19:37:24,233 INFO L175 Difference]: Start difference. First operand has 140 places, 266 transitions, 4178 flow. Second operand 10 states and 178 transitions. [2024-06-21 19:37:24,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 326 transitions, 5325 flow [2024-06-21 19:37:24,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 326 transitions, 5131 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:37:24,355 INFO L231 Difference]: Finished difference. Result has 145 places, 284 transitions, 4690 flow [2024-06-21 19:37:24,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3984, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4690, PETRI_PLACES=145, PETRI_TRANSITIONS=284} [2024-06-21 19:37:24,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 19:37:24,357 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 284 transitions, 4690 flow [2024-06-21 19:37:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:24,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:24,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:37:24,358 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)] === [2024-06-21 19:37:24,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1229018390, now seen corresponding path program 8 times [2024-06-21 19:37:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:24,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263324547] [2024-06-21 19:37:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:27,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263324547] [2024-06-21 19:37:27,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263324547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:27,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:27,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858405744] [2024-06-21 19:37:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:27,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:27,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:27,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:27,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 284 transitions, 4690 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:27,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:27,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:27,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:29,573 INFO L124 PetriNetUnfolderBase]: 1918/3052 cut-off events. [2024-06-21 19:37:29,573 INFO L125 PetriNetUnfolderBase]: For 58698/58698 co-relation queries the response was YES. [2024-06-21 19:37:29,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21481 conditions, 3052 events. 1918/3052 cut-off events. For 58698/58698 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16104 event pairs, 445 based on Foata normal form. 2/3046 useless extension candidates. Maximal degree in co-relation 21411. Up to 2333 conditions per place. [2024-06-21 19:37:29,599 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 173 selfloop transitions, 154 changer transitions 0/332 dead transitions. [2024-06-21 19:37:29,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 332 transitions, 5566 flow [2024-06-21 19:37:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:37:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:37:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 19:37:29,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 19:37:29,601 INFO L175 Difference]: Start difference. First operand has 145 places, 284 transitions, 4690 flow. Second operand 11 states and 192 transitions. [2024-06-21 19:37:29,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 332 transitions, 5566 flow [2024-06-21 19:37:29,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 332 transitions, 5296 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 19:37:29,707 INFO L231 Difference]: Finished difference. Result has 152 places, 287 transitions, 4788 flow [2024-06-21 19:37:29,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4788, PETRI_PLACES=152, PETRI_TRANSITIONS=287} [2024-06-21 19:37:29,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 19:37:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 287 transitions, 4788 flow [2024-06-21 19:37:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:29,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:37:29,708 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)] === [2024-06-21 19:37:29,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2139007838, now seen corresponding path program 1 times [2024-06-21 19:37:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957962103] [2024-06-21 19:37:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:33,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957962103] [2024-06-21 19:37:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957962103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:33,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229408054] [2024-06-21 19:37:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:33,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:33,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:33,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 287 transitions, 4788 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:33,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:33,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:33,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:35,309 INFO L124 PetriNetUnfolderBase]: 2159/3464 cut-off events. [2024-06-21 19:37:35,309 INFO L125 PetriNetUnfolderBase]: For 71994/72005 co-relation queries the response was YES. [2024-06-21 19:37:35,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23959 conditions, 3464 events. 2159/3464 cut-off events. For 71994/72005 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19167 event pairs, 407 based on Foata normal form. 10/3466 useless extension candidates. Maximal degree in co-relation 23889. Up to 2627 conditions per place. [2024-06-21 19:37:35,340 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 83 changer transitions 0/340 dead transitions. [2024-06-21 19:37:35,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 340 transitions, 5804 flow [2024-06-21 19:37:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:37:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:37:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 19:37:35,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 19:37:35,342 INFO L175 Difference]: Start difference. First operand has 152 places, 287 transitions, 4788 flow. Second operand 9 states and 177 transitions. [2024-06-21 19:37:35,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 340 transitions, 5804 flow [2024-06-21 19:37:35,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 340 transitions, 5474 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 19:37:35,474 INFO L231 Difference]: Finished difference. Result has 153 places, 294 transitions, 4752 flow [2024-06-21 19:37:35,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4752, PETRI_PLACES=153, PETRI_TRANSITIONS=294} [2024-06-21 19:37:35,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 19:37:35,475 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 294 transitions, 4752 flow [2024-06-21 19:37:35,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:35,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:35,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:37:35,475 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:35,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2139068288, now seen corresponding path program 2 times [2024-06-21 19:37:35,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:35,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304108897] [2024-06-21 19:37:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:39,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304108897] [2024-06-21 19:37:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304108897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:39,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:39,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119951606] [2024-06-21 19:37:39,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:39,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:39,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:39,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 294 transitions, 4752 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:39,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:39,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:39,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:40,830 INFO L124 PetriNetUnfolderBase]: 2146/3446 cut-off events. [2024-06-21 19:37:40,831 INFO L125 PetriNetUnfolderBase]: For 73928/73939 co-relation queries the response was YES. [2024-06-21 19:37:40,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24027 conditions, 3446 events. 2146/3446 cut-off events. For 73928/73939 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18962 event pairs, 433 based on Foata normal form. 10/3448 useless extension candidates. Maximal degree in co-relation 23955. Up to 2969 conditions per place. [2024-06-21 19:37:40,860 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 243 selfloop transitions, 86 changer transitions 0/334 dead transitions. [2024-06-21 19:37:40,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 334 transitions, 5598 flow [2024-06-21 19:37:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:37:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:37:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 19:37:40,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:37:40,862 INFO L175 Difference]: Start difference. First operand has 153 places, 294 transitions, 4752 flow. Second operand 9 states and 168 transitions. [2024-06-21 19:37:40,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 334 transitions, 5598 flow [2024-06-21 19:37:40,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 334 transitions, 5468 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:37:41,000 INFO L231 Difference]: Finished difference. Result has 157 places, 297 transitions, 4862 flow [2024-06-21 19:37:41,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4624, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4862, PETRI_PLACES=157, PETRI_TRANSITIONS=297} [2024-06-21 19:37:41,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 19:37:41,000 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 297 transitions, 4862 flow [2024-06-21 19:37:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:41,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:41,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:41,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:37:41,001 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:41,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:41,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1706439440, now seen corresponding path program 3 times [2024-06-21 19:37:41,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:41,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670820889] [2024-06-21 19:37:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:41,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:44,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670820889] [2024-06-21 19:37:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670820889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:44,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:44,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758530975] [2024-06-21 19:37:44,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:44,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:44,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:44,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:44,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 297 transitions, 4862 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:44,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:44,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:44,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:46,211 INFO L124 PetriNetUnfolderBase]: 2166/3465 cut-off events. [2024-06-21 19:37:46,212 INFO L125 PetriNetUnfolderBase]: For 81747/81780 co-relation queries the response was YES. [2024-06-21 19:37:46,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24670 conditions, 3465 events. 2166/3465 cut-off events. For 81747/81780 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19059 event pairs, 485 based on Foata normal form. 10/3461 useless extension candidates. Maximal degree in co-relation 24596. Up to 2703 conditions per place. [2024-06-21 19:37:46,242 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 152 changer transitions 0/329 dead transitions. [2024-06-21 19:37:46,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 329 transitions, 5654 flow [2024-06-21 19:37:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 19:37:46,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 19:37:46,244 INFO L175 Difference]: Start difference. First operand has 157 places, 297 transitions, 4862 flow. Second operand 8 states and 150 transitions. [2024-06-21 19:37:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 329 transitions, 5654 flow [2024-06-21 19:37:46,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 329 transitions, 5450 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 19:37:46,373 INFO L231 Difference]: Finished difference. Result has 158 places, 299 transitions, 5011 flow [2024-06-21 19:37:46,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5011, PETRI_PLACES=158, PETRI_TRANSITIONS=299} [2024-06-21 19:37:46,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 19:37:46,373 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 299 transitions, 5011 flow [2024-06-21 19:37:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:46,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:46,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:46,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:37:46,374 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:46,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:46,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1282675486, now seen corresponding path program 4 times [2024-06-21 19:37:46,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:46,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365039537] [2024-06-21 19:37:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:46,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:49,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365039537] [2024-06-21 19:37:49,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365039537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:49,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:49,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:49,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294359293] [2024-06-21 19:37:49,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:49,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:49,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:50,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:50,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 299 transitions, 5011 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:50,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:50,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:50,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:51,535 INFO L124 PetriNetUnfolderBase]: 2186/3472 cut-off events. [2024-06-21 19:37:51,535 INFO L125 PetriNetUnfolderBase]: For 88512/88532 co-relation queries the response was YES. [2024-06-21 19:37:51,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25354 conditions, 3472 events. 2186/3472 cut-off events. For 88512/88532 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18939 event pairs, 501 based on Foata normal form. 9/3430 useless extension candidates. Maximal degree in co-relation 25279. Up to 2739 conditions per place. [2024-06-21 19:37:51,566 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 166 selfloop transitions, 161 changer transitions 0/332 dead transitions. [2024-06-21 19:37:51,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 332 transitions, 5839 flow [2024-06-21 19:37:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 19:37:51,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 19:37:51,568 INFO L175 Difference]: Start difference. First operand has 158 places, 299 transitions, 5011 flow. Second operand 8 states and 145 transitions. [2024-06-21 19:37:51,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 332 transitions, 5839 flow [2024-06-21 19:37:51,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 332 transitions, 5508 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:37:51,762 INFO L231 Difference]: Finished difference. Result has 160 places, 301 transitions, 5054 flow [2024-06-21 19:37:51,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5054, PETRI_PLACES=160, PETRI_TRANSITIONS=301} [2024-06-21 19:37:51,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 19:37:51,763 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 301 transitions, 5054 flow [2024-06-21 19:37:51,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:51,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:37:51,765 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1919733782, now seen corresponding path program 1 times [2024-06-21 19:37:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989488188] [2024-06-21 19:37:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:54,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989488188] [2024-06-21 19:37:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989488188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:54,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:37:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871375492] [2024-06-21 19:37:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:54,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:37:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:37:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:37:55,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:55,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 301 transitions, 5054 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:55,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:55,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:55,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:56,339 INFO L124 PetriNetUnfolderBase]: 2178/3511 cut-off events. [2024-06-21 19:37:56,340 INFO L125 PetriNetUnfolderBase]: For 93889/93982 co-relation queries the response was YES. [2024-06-21 19:37:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25542 conditions, 3511 events. 2178/3511 cut-off events. For 93889/93982 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19631 event pairs, 411 based on Foata normal form. 71/3568 useless extension candidates. Maximal degree in co-relation 25466. Up to 2980 conditions per place. [2024-06-21 19:37:56,375 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 265 selfloop transitions, 63 changer transitions 0/333 dead transitions. [2024-06-21 19:37:56,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 333 transitions, 5890 flow [2024-06-21 19:37:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:37:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:37:56,377 INFO L175 Difference]: Start difference. First operand has 160 places, 301 transitions, 5054 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:37:56,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 333 transitions, 5890 flow [2024-06-21 19:37:56,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 333 transitions, 5536 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:37:56,553 INFO L231 Difference]: Finished difference. Result has 162 places, 303 transitions, 4867 flow [2024-06-21 19:37:56,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4700, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4867, PETRI_PLACES=162, PETRI_TRANSITIONS=303} [2024-06-21 19:37:56,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 19:37:56,554 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 303 transitions, 4867 flow [2024-06-21 19:37:56,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:56,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:56,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:56,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:37:56,554 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:56,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash 781116092, now seen corresponding path program 5 times [2024-06-21 19:37:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604817616] [2024-06-21 19:37:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:56,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:58,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:58,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604817616] [2024-06-21 19:37:58,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604817616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:58,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:58,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715477610] [2024-06-21 19:37:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:58,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:59,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:59,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 303 transitions, 4867 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:59,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:59,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:59,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:00,676 INFO L124 PetriNetUnfolderBase]: 2680/4322 cut-off events. [2024-06-21 19:38:00,676 INFO L125 PetriNetUnfolderBase]: For 117646/117656 co-relation queries the response was YES. [2024-06-21 19:38:00,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30812 conditions, 4322 events. 2680/4322 cut-off events. For 117646/117656 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25352 event pairs, 525 based on Foata normal form. 18/4337 useless extension candidates. Maximal degree in co-relation 30735. Up to 3077 conditions per place. [2024-06-21 19:38:00,716 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 297 selfloop transitions, 85 changer transitions 0/387 dead transitions. [2024-06-21 19:38:00,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 387 transitions, 6298 flow [2024-06-21 19:38:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:38:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:38:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 19:38:00,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-21 19:38:00,719 INFO L175 Difference]: Start difference. First operand has 162 places, 303 transitions, 4867 flow. Second operand 11 states and 214 transitions. [2024-06-21 19:38:00,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 387 transitions, 6298 flow [2024-06-21 19:38:00,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 387 transitions, 6149 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:00,917 INFO L231 Difference]: Finished difference. Result has 168 places, 315 transitions, 5093 flow [2024-06-21 19:38:00,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4718, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5093, PETRI_PLACES=168, PETRI_TRANSITIONS=315} [2024-06-21 19:38:00,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 19:38:00,918 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 315 transitions, 5093 flow [2024-06-21 19:38:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:00,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:00,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:38:00,918 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:00,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1591482942, now seen corresponding path program 6 times [2024-06-21 19:38:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:00,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97481564] [2024-06-21 19:38:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:03,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:03,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97481564] [2024-06-21 19:38:03,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97481564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:03,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:03,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:03,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662932519] [2024-06-21 19:38:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:03,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:03,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 315 transitions, 5093 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:03,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:03,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:03,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:05,022 INFO L124 PetriNetUnfolderBase]: 3254/5240 cut-off events. [2024-06-21 19:38:05,023 INFO L125 PetriNetUnfolderBase]: For 157119/157119 co-relation queries the response was YES. [2024-06-21 19:38:05,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38142 conditions, 5240 events. 3254/5240 cut-off events. For 157119/157119 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31706 event pairs, 619 based on Foata normal form. 8/5245 useless extension candidates. Maximal degree in co-relation 38063. Up to 2802 conditions per place. [2024-06-21 19:38:05,071 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 232 selfloop transitions, 163 changer transitions 0/400 dead transitions. [2024-06-21 19:38:05,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 400 transitions, 6654 flow [2024-06-21 19:38:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:38:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:38:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 19:38:05,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47835497835497837 [2024-06-21 19:38:05,073 INFO L175 Difference]: Start difference. First operand has 168 places, 315 transitions, 5093 flow. Second operand 11 states and 221 transitions. [2024-06-21 19:38:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 400 transitions, 6654 flow [2024-06-21 19:38:05,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 400 transitions, 6528 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:05,342 INFO L231 Difference]: Finished difference. Result has 174 places, 331 transitions, 5608 flow [2024-06-21 19:38:05,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5608, PETRI_PLACES=174, PETRI_TRANSITIONS=331} [2024-06-21 19:38:05,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 19:38:05,343 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 331 transitions, 5608 flow [2024-06-21 19:38:05,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:05,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:05,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:05,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:38:05,344 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:05,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1594339902, now seen corresponding path program 7 times [2024-06-21 19:38:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:05,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489036537] [2024-06-21 19:38:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:07,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:07,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489036537] [2024-06-21 19:38:07,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489036537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:07,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:07,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284071335] [2024-06-21 19:38:07,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:07,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:07,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:07,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 331 transitions, 5608 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:07,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:07,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:07,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:09,647 INFO L124 PetriNetUnfolderBase]: 3232/5204 cut-off events. [2024-06-21 19:38:09,647 INFO L125 PetriNetUnfolderBase]: For 169041/169041 co-relation queries the response was YES. [2024-06-21 19:38:09,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39398 conditions, 5204 events. 3232/5204 cut-off events. For 169041/169041 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31539 event pairs, 674 based on Foata normal form. 16/5217 useless extension candidates. Maximal degree in co-relation 39316. Up to 4240 conditions per place. [2024-06-21 19:38:09,694 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 235 selfloop transitions, 153 changer transitions 0/393 dead transitions. [2024-06-21 19:38:09,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 393 transitions, 6883 flow [2024-06-21 19:38:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:38:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:38:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 19:38:09,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 19:38:09,696 INFO L175 Difference]: Start difference. First operand has 174 places, 331 transitions, 5608 flow. Second operand 11 states and 213 transitions. [2024-06-21 19:38:09,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 393 transitions, 6883 flow [2024-06-21 19:38:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 393 transitions, 6628 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 19:38:10,013 INFO L231 Difference]: Finished difference. Result has 178 places, 338 transitions, 5823 flow [2024-06-21 19:38:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5365, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5823, PETRI_PLACES=178, PETRI_TRANSITIONS=338} [2024-06-21 19:38:10,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 19:38:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 338 transitions, 5823 flow [2024-06-21 19:38:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:10,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:10,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:38:10,015 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:10,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash -620611488, now seen corresponding path program 8 times [2024-06-21 19:38:10,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:10,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586101662] [2024-06-21 19:38:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:11,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586101662] [2024-06-21 19:38:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586101662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:11,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:11,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:38:11,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129110805] [2024-06-21 19:38:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:11,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:38:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:38:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:38:11,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:38:11,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 338 transitions, 5823 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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) [2024-06-21 19:38:11,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:11,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:38:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:13,772 INFO L124 PetriNetUnfolderBase]: 3218/5677 cut-off events. [2024-06-21 19:38:13,772 INFO L125 PetriNetUnfolderBase]: For 178402/178729 co-relation queries the response was YES. [2024-06-21 19:38:13,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41264 conditions, 5677 events. 3218/5677 cut-off events. For 178402/178729 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 39471 event pairs, 324 based on Foata normal form. 166/5685 useless extension candidates. Maximal degree in co-relation 41180. Up to 1784 conditions per place. [2024-06-21 19:38:13,824 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 176 selfloop transitions, 157 changer transitions 0/436 dead transitions. [2024-06-21 19:38:13,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 436 transitions, 7588 flow [2024-06-21 19:38:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:38:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:38:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 19:38:13,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-21 19:38:13,826 INFO L175 Difference]: Start difference. First operand has 178 places, 338 transitions, 5823 flow. Second operand 10 states and 222 transitions. [2024-06-21 19:38:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 436 transitions, 7588 flow [2024-06-21 19:38:14,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 436 transitions, 7289 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 19:38:14,142 INFO L231 Difference]: Finished difference. Result has 184 places, 369 transitions, 6566 flow [2024-06-21 19:38:14,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5524, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6566, PETRI_PLACES=184, PETRI_TRANSITIONS=369} [2024-06-21 19:38:14,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 19:38:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 369 transitions, 6566 flow [2024-06-21 19:38:14,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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) [2024-06-21 19:38:14,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:14,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:14,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:38:14,144 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:14,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash -385932544, now seen corresponding path program 9 times [2024-06-21 19:38:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:14,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709204967] [2024-06-21 19:38:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:14,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:17,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709204967] [2024-06-21 19:38:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709204967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:17,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:17,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:17,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043651430] [2024-06-21 19:38:17,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:17,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:17,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:17,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:17,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:17,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 369 transitions, 6566 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:17,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:17,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:17,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:19,423 INFO L124 PetriNetUnfolderBase]: 4058/6508 cut-off events. [2024-06-21 19:38:19,423 INFO L125 PetriNetUnfolderBase]: For 249075/249075 co-relation queries the response was YES. [2024-06-21 19:38:19,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51965 conditions, 6508 events. 4058/6508 cut-off events. For 249075/249075 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 40840 event pairs, 1210 based on Foata normal form. 4/6503 useless extension candidates. Maximal degree in co-relation 51876. Up to 5665 conditions per place. [2024-06-21 19:38:19,485 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 256 selfloop transitions, 158 changer transitions 0/419 dead transitions. [2024-06-21 19:38:19,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 419 transitions, 7662 flow [2024-06-21 19:38:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:38:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:38:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 19:38:19,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 19:38:19,487 INFO L175 Difference]: Start difference. First operand has 184 places, 369 transitions, 6566 flow. Second operand 11 states and 192 transitions. [2024-06-21 19:38:19,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 419 transitions, 7662 flow [2024-06-21 19:38:19,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 419 transitions, 7580 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 19:38:19,995 INFO L231 Difference]: Finished difference. Result has 191 places, 373 transitions, 6886 flow [2024-06-21 19:38:19,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6886, PETRI_PLACES=191, PETRI_TRANSITIONS=373} [2024-06-21 19:38:19,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 19:38:19,996 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 373 transitions, 6886 flow [2024-06-21 19:38:19,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:19,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:19,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:19,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:38:19,996 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:19,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1884734487, now seen corresponding path program 1 times [2024-06-21 19:38:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:19,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145020945] [2024-06-21 19:38:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:19,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:23,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145020945] [2024-06-21 19:38:23,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145020945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:23,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:23,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:23,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536733164] [2024-06-21 19:38:23,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:23,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:23,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:23,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:23,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:23,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:23,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 373 transitions, 6886 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:38:23,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:23,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:23,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:26,259 INFO L124 PetriNetUnfolderBase]: 4268/6909 cut-off events. [2024-06-21 19:38:26,259 INFO L125 PetriNetUnfolderBase]: For 276625/276636 co-relation queries the response was YES. [2024-06-21 19:38:26,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54545 conditions, 6909 events. 4268/6909 cut-off events. For 276625/276636 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 44299 event pairs, 1178 based on Foata normal form. 52/6953 useless extension candidates. Maximal degree in co-relation 54455. Up to 5123 conditions per place. [2024-06-21 19:38:26,327 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 312 selfloop transitions, 108 changer transitions 0/425 dead transitions. [2024-06-21 19:38:26,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 425 transitions, 8172 flow [2024-06-21 19:38:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:38:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:38:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 19:38:26,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 19:38:26,329 INFO L175 Difference]: Start difference. First operand has 191 places, 373 transitions, 6886 flow. Second operand 9 states and 178 transitions. [2024-06-21 19:38:26,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 425 transitions, 8172 flow [2024-06-21 19:38:26,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 425 transitions, 7806 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 19:38:26,863 INFO L231 Difference]: Finished difference. Result has 191 places, 378 transitions, 6873 flow [2024-06-21 19:38:26,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6873, PETRI_PLACES=191, PETRI_TRANSITIONS=378} [2024-06-21 19:38:26,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 19:38:26,864 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 378 transitions, 6873 flow [2024-06-21 19:38:26,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:38:26,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:26,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:38:26,865 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:26,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1113978941, now seen corresponding path program 2 times [2024-06-21 19:38:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278375065] [2024-06-21 19:38:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:31,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:31,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278375065] [2024-06-21 19:38:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278375065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:31,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:31,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:31,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313253030] [2024-06-21 19:38:31,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:31,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:31,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:31,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 378 transitions, 6873 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:38:31,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:31,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:31,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:33,552 INFO L124 PetriNetUnfolderBase]: 4132/6716 cut-off events. [2024-06-21 19:38:33,552 INFO L125 PetriNetUnfolderBase]: For 264718/264729 co-relation queries the response was YES. [2024-06-21 19:38:33,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51759 conditions, 6716 events. 4132/6716 cut-off events. For 264718/264729 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 43119 event pairs, 1233 based on Foata normal form. 68/6776 useless extension candidates. Maximal degree in co-relation 51668. Up to 5743 conditions per place. [2024-06-21 19:38:33,624 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 88 changer transitions 0/418 dead transitions. [2024-06-21 19:38:33,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 418 transitions, 7886 flow [2024-06-21 19:38:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:38:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:38:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 19:38:33,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 19:38:33,626 INFO L175 Difference]: Start difference. First operand has 191 places, 378 transitions, 6873 flow. Second operand 10 states and 178 transitions. [2024-06-21 19:38:33,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 418 transitions, 7886 flow [2024-06-21 19:38:34,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 418 transitions, 7649 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:34,132 INFO L231 Difference]: Finished difference. Result has 195 places, 378 transitions, 6835 flow [2024-06-21 19:38:34,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6835, PETRI_PLACES=195, PETRI_TRANSITIONS=378} [2024-06-21 19:38:34,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 19:38:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 378 transitions, 6835 flow [2024-06-21 19:38:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:38:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:34,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:38:34,134 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:34,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1252507091, now seen corresponding path program 3 times [2024-06-21 19:38:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627232297] [2024-06-21 19:38:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:38,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627232297] [2024-06-21 19:38:38,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627232297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:38,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:38,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:38:38,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396986438] [2024-06-21 19:38:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:38,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:38:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:38:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:38:38,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:38,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 378 transitions, 6835 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:38,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:38,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:38,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:40,897 INFO L124 PetriNetUnfolderBase]: 4200/6828 cut-off events. [2024-06-21 19:38:40,898 INFO L125 PetriNetUnfolderBase]: For 254936/254969 co-relation queries the response was YES. [2024-06-21 19:38:40,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52149 conditions, 6828 events. 4200/6828 cut-off events. For 254936/254969 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 44077 event pairs, 1259 based on Foata normal form. 22/6836 useless extension candidates. Maximal degree in co-relation 52057. Up to 5835 conditions per place. [2024-06-21 19:38:40,986 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 261 selfloop transitions, 151 changer transitions 0/417 dead transitions. [2024-06-21 19:38:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 417 transitions, 7862 flow [2024-06-21 19:38:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:38:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:38:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 19:38:40,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 19:38:40,988 INFO L175 Difference]: Start difference. First operand has 195 places, 378 transitions, 6835 flow. Second operand 10 states and 176 transitions. [2024-06-21 19:38:40,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 417 transitions, 7862 flow [2024-06-21 19:38:41,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 417 transitions, 7693 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:38:41,553 INFO L231 Difference]: Finished difference. Result has 197 places, 379 transitions, 7017 flow [2024-06-21 19:38:41,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6666, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7017, PETRI_PLACES=197, PETRI_TRANSITIONS=379} [2024-06-21 19:38:41,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 19:38:41,554 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 379 transitions, 7017 flow [2024-06-21 19:38:41,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:41,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:41,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:41,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:38:41,555 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:41,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1252359221, now seen corresponding path program 4 times [2024-06-21 19:38:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782299901] [2024-06-21 19:38:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782299901] [2024-06-21 19:38:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782299901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:45,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:45,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:38:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243303071] [2024-06-21 19:38:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:38:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:38:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:38:45,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:45,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 379 transitions, 7017 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:45,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:45,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:45,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:48,386 INFO L124 PetriNetUnfolderBase]: 4248/6912 cut-off events. [2024-06-21 19:38:48,386 INFO L125 PetriNetUnfolderBase]: For 267226/267259 co-relation queries the response was YES. [2024-06-21 19:38:48,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53077 conditions, 6912 events. 4248/6912 cut-off events. For 267226/267259 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 44842 event pairs, 1253 based on Foata normal form. 18/6916 useless extension candidates. Maximal degree in co-relation 52984. Up to 5787 conditions per place. [2024-06-21 19:38:48,460 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 265 selfloop transitions, 156 changer transitions 0/426 dead transitions. [2024-06-21 19:38:48,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 426 transitions, 8102 flow [2024-06-21 19:38:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:38:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:38:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 19:38:48,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 19:38:48,462 INFO L175 Difference]: Start difference. First operand has 197 places, 379 transitions, 7017 flow. Second operand 10 states and 186 transitions. [2024-06-21 19:38:48,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 426 transitions, 8102 flow [2024-06-21 19:38:48,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 426 transitions, 7818 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:38:49,002 INFO L231 Difference]: Finished difference. Result has 200 places, 380 transitions, 7090 flow [2024-06-21 19:38:49,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6733, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7090, PETRI_PLACES=200, PETRI_TRANSITIONS=380} [2024-06-21 19:38:49,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 19:38:49,003 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 380 transitions, 7090 flow [2024-06-21 19:38:49,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:49,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:49,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:49,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:38:49,004 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:49,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1257869471, now seen corresponding path program 5 times [2024-06-21 19:38:49,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:49,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765223032] [2024-06-21 19:38:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:49,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:53,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765223032] [2024-06-21 19:38:53,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765223032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:53,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:53,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:38:53,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715944873] [2024-06-21 19:38:53,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:53,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:38:53,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:38:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:38:53,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:53,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 380 transitions, 7090 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:38:53,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:53,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:53,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:55,579 INFO L124 PetriNetUnfolderBase]: 4316/7046 cut-off events. [2024-06-21 19:38:55,579 INFO L125 PetriNetUnfolderBase]: For 284361/284394 co-relation queries the response was YES. [2024-06-21 19:38:55,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54038 conditions, 7046 events. 4316/7046 cut-off events. For 284361/284394 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 46183 event pairs, 1282 based on Foata normal form. 22/7054 useless extension candidates. Maximal degree in co-relation 53944. Up to 6043 conditions per place. [2024-06-21 19:38:55,658 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 258 selfloop transitions, 152 changer transitions 0/415 dead transitions. [2024-06-21 19:38:55,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 415 transitions, 8107 flow [2024-06-21 19:38:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:38:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:38:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 19:38:55,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:38:55,660 INFO L175 Difference]: Start difference. First operand has 200 places, 380 transitions, 7090 flow. Second operand 8 states and 152 transitions. [2024-06-21 19:38:55,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 415 transitions, 8107 flow [2024-06-21 19:38:56,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 415 transitions, 7770 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:38:56,235 INFO L231 Difference]: Finished difference. Result has 200 places, 381 transitions, 7108 flow [2024-06-21 19:38:56,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7108, PETRI_PLACES=200, PETRI_TRANSITIONS=381} [2024-06-21 19:38:56,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 19:38:56,236 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 381 transitions, 7108 flow [2024-06-21 19:38:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:38:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:56,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:56,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:38:56,236 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:56,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1777274155, now seen corresponding path program 1 times [2024-06-21 19:38:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77053891] [2024-06-21 19:38:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:00,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:00,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77053891] [2024-06-21 19:39:00,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77053891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:00,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:00,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039092054] [2024-06-21 19:39:00,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:00,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:00,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:00,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 381 transitions, 7108 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:00,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:00,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:00,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:03,004 INFO L124 PetriNetUnfolderBase]: 4494/7348 cut-off events. [2024-06-21 19:39:03,004 INFO L125 PetriNetUnfolderBase]: For 309125/309158 co-relation queries the response was YES. [2024-06-21 19:39:03,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56520 conditions, 7348 events. 4494/7348 cut-off events. For 309125/309158 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 48759 event pairs, 1300 based on Foata normal form. 18/7352 useless extension candidates. Maximal degree in co-relation 56425. Up to 5521 conditions per place. [2024-06-21 19:39:03,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 260 selfloop transitions, 162 changer transitions 0/427 dead transitions. [2024-06-21 19:39:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 427 transitions, 8397 flow [2024-06-21 19:39:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:39:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:39:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 19:39:03,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:39:03,086 INFO L175 Difference]: Start difference. First operand has 200 places, 381 transitions, 7108 flow. Second operand 8 states and 156 transitions. [2024-06-21 19:39:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 427 transitions, 8397 flow [2024-06-21 19:39:03,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 427 transitions, 8056 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:03,692 INFO L231 Difference]: Finished difference. Result has 203 places, 387 transitions, 7275 flow [2024-06-21 19:39:03,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7275, PETRI_PLACES=203, PETRI_TRANSITIONS=387} [2024-06-21 19:39:03,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 19:39:03,693 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 387 transitions, 7275 flow [2024-06-21 19:39:03,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:03,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:03,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:03,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:39:03,694 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:03,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash -411253341, now seen corresponding path program 6 times [2024-06-21 19:39:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:03,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003910204] [2024-06-21 19:39:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003910204] [2024-06-21 19:39:07,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003910204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:07,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:07,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531461064] [2024-06-21 19:39:07,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:07,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:07,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 387 transitions, 7275 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:07,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:07,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:07,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:09,711 INFO L124 PetriNetUnfolderBase]: 4562/7486 cut-off events. [2024-06-21 19:39:09,712 INFO L125 PetriNetUnfolderBase]: For 327611/327695 co-relation queries the response was YES. [2024-06-21 19:39:09,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57782 conditions, 7486 events. 4562/7486 cut-off events. For 327611/327695 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50121 event pairs, 1344 based on Foata normal form. 50/7511 useless extension candidates. Maximal degree in co-relation 57686. Up to 6465 conditions per place. [2024-06-21 19:39:09,790 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 266 selfloop transitions, 151 changer transitions 0/422 dead transitions. [2024-06-21 19:39:09,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 422 transitions, 8328 flow [2024-06-21 19:39:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:39:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:39:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 19:39:09,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:39:09,801 INFO L175 Difference]: Start difference. First operand has 203 places, 387 transitions, 7275 flow. Second operand 8 states and 147 transitions. [2024-06-21 19:39:09,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 422 transitions, 8328 flow [2024-06-21 19:39:10,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 422 transitions, 8123 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 19:39:10,387 INFO L231 Difference]: Finished difference. Result has 207 places, 388 transitions, 7425 flow [2024-06-21 19:39:10,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7425, PETRI_PLACES=207, PETRI_TRANSITIONS=388} [2024-06-21 19:39:10,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 19:39:10,388 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 388 transitions, 7425 flow [2024-06-21 19:39:10,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:10,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:10,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:10,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:39:10,389 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:10,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1108239071, now seen corresponding path program 7 times [2024-06-21 19:39:10,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:10,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438928551] [2024-06-21 19:39:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:10,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438928551] [2024-06-21 19:39:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438928551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:14,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493021953] [2024-06-21 19:39:14,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:14,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:14,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 388 transitions, 7425 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:14,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:14,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:14,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:17,560 INFO L124 PetriNetUnfolderBase]: 4534/7407 cut-off events. [2024-06-21 19:39:17,561 INFO L125 PetriNetUnfolderBase]: For 326383/326403 co-relation queries the response was YES. [2024-06-21 19:39:17,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57530 conditions, 7407 events. 4534/7407 cut-off events. For 326383/326403 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 49225 event pairs, 1344 based on Foata normal form. 21/7383 useless extension candidates. Maximal degree in co-relation 57432. Up to 6413 conditions per place. [2024-06-21 19:39:17,637 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 160 changer transitions 0/427 dead transitions. [2024-06-21 19:39:17,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 427 transitions, 8468 flow [2024-06-21 19:39:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:39:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:39:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 19:39:17,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 19:39:17,639 INFO L175 Difference]: Start difference. First operand has 207 places, 388 transitions, 7425 flow. Second operand 10 states and 171 transitions. [2024-06-21 19:39:17,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 427 transitions, 8468 flow [2024-06-21 19:39:18,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 427 transitions, 8121 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:18,375 INFO L231 Difference]: Finished difference. Result has 211 places, 388 transitions, 7409 flow [2024-06-21 19:39:18,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7078, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7409, PETRI_PLACES=211, PETRI_TRANSITIONS=388} [2024-06-21 19:39:18,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 19:39:18,375 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 388 transitions, 7409 flow [2024-06-21 19:39:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:18,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:18,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:18,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:39:18,376 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:18,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:18,377 INFO L85 PathProgramCache]: Analyzing trace with hash -337335243, now seen corresponding path program 8 times [2024-06-21 19:39:18,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:18,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069481753] [2024-06-21 19:39:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069481753] [2024-06-21 19:39:22,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069481753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:22,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:22,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:39:22,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713978027] [2024-06-21 19:39:22,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:39:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:39:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:39:22,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:22,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 388 transitions, 7409 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:22,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:22,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:22,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:25,659 INFO L124 PetriNetUnfolderBase]: 4582/7491 cut-off events. [2024-06-21 19:39:25,659 INFO L125 PetriNetUnfolderBase]: For 333906/333926 co-relation queries the response was YES. [2024-06-21 19:39:25,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58072 conditions, 7491 events. 4582/7491 cut-off events. For 333906/333926 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 49943 event pairs, 1338 based on Foata normal form. 17/7463 useless extension candidates. Maximal degree in co-relation 57973. Up to 6387 conditions per place. [2024-06-21 19:39:25,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 163 changer transitions 0/436 dead transitions. [2024-06-21 19:39:25,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 436 transitions, 8552 flow [2024-06-21 19:39:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:39:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:39:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:39:25,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 19:39:25,762 INFO L175 Difference]: Start difference. First operand has 211 places, 388 transitions, 7409 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:39:25,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 436 transitions, 8552 flow [2024-06-21 19:39:26,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 436 transitions, 8225 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 19:39:26,448 INFO L231 Difference]: Finished difference. Result has 213 places, 389 transitions, 7460 flow [2024-06-21 19:39:26,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7460, PETRI_PLACES=213, PETRI_TRANSITIONS=389} [2024-06-21 19:39:26,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 19:39:26,449 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 389 transitions, 7460 flow [2024-06-21 19:39:26,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:26,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:26,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:26,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:39:26,449 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:26,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1368029259, now seen corresponding path program 2 times [2024-06-21 19:39:26,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:26,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729547379] [2024-06-21 19:39:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:26,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:29,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729547379] [2024-06-21 19:39:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729547379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:29,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:29,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:29,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950933906] [2024-06-21 19:39:29,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:29,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:29,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:29,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:29,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 389 transitions, 7460 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:29,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:32,037 INFO L124 PetriNetUnfolderBase]: 4630/7619 cut-off events. [2024-06-21 19:39:32,037 INFO L125 PetriNetUnfolderBase]: For 351717/351801 co-relation queries the response was YES. [2024-06-21 19:39:32,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58970 conditions, 7619 events. 4630/7619 cut-off events. For 351717/351801 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 51330 event pairs, 1344 based on Foata normal form. 46/7640 useless extension candidates. Maximal degree in co-relation 58870. Up to 6479 conditions per place. [2024-06-21 19:39:32,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 153 changer transitions 0/427 dead transitions. [2024-06-21 19:39:32,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 427 transitions, 8543 flow [2024-06-21 19:39:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:39:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:39:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 19:39:32,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 19:39:32,125 INFO L175 Difference]: Start difference. First operand has 213 places, 389 transitions, 7460 flow. Second operand 8 states and 150 transitions. [2024-06-21 19:39:32,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 427 transitions, 8543 flow [2024-06-21 19:39:32,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 427 transitions, 8183 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 19:39:32,833 INFO L231 Difference]: Finished difference. Result has 213 places, 390 transitions, 7460 flow [2024-06-21 19:39:32,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7100, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7460, PETRI_PLACES=213, PETRI_TRANSITIONS=390} [2024-06-21 19:39:32,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 19:39:32,843 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 390 transitions, 7460 flow [2024-06-21 19:39:32,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:32,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:32,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:32,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:39:32,843 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:32,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash -145340859, now seen corresponding path program 3 times [2024-06-21 19:39:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:32,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743074493] [2024-06-21 19:39:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:36,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743074493] [2024-06-21 19:39:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743074493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:36,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:36,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26410863] [2024-06-21 19:39:36,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:36,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:36,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 390 transitions, 7460 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:36,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:36,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:36,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:38,742 INFO L124 PetriNetUnfolderBase]: 4882/8063 cut-off events. [2024-06-21 19:39:38,742 INFO L125 PetriNetUnfolderBase]: For 404323/404407 co-relation queries the response was YES. [2024-06-21 19:39:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63134 conditions, 8063 events. 4882/8063 cut-off events. For 404323/404407 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55048 event pairs, 1389 based on Foata normal form. 46/8084 useless extension candidates. Maximal degree in co-relation 63033. Up to 5375 conditions per place. [2024-06-21 19:39:38,822 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 171 changer transitions 0/435 dead transitions. [2024-06-21 19:39:38,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 435 transitions, 8850 flow [2024-06-21 19:39:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:39:38,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:39:38,824 INFO L175 Difference]: Start difference. First operand has 213 places, 390 transitions, 7460 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:39:38,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 435 transitions, 8850 flow [2024-06-21 19:39:39,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 435 transitions, 8501 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 19:39:39,562 INFO L231 Difference]: Finished difference. Result has 218 places, 394 transitions, 7696 flow [2024-06-21 19:39:39,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7696, PETRI_PLACES=218, PETRI_TRANSITIONS=394} [2024-06-21 19:39:39,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 19:39:39,562 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 394 transitions, 7696 flow [2024-06-21 19:39:39,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:39,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:39,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:39:39,563 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:39,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1017241319, now seen corresponding path program 9 times [2024-06-21 19:39:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36928896] [2024-06-21 19:39:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:41,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:41,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36928896] [2024-06-21 19:39:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36928896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:41,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:41,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922985039] [2024-06-21 19:39:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:41,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:41,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 394 transitions, 7696 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:44,367 INFO L124 PetriNetUnfolderBase]: 4922/8121 cut-off events. [2024-06-21 19:39:44,367 INFO L125 PetriNetUnfolderBase]: For 424284/424284 co-relation queries the response was YES. [2024-06-21 19:39:44,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63129 conditions, 8121 events. 4922/8121 cut-off events. For 424284/424284 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55365 event pairs, 1227 based on Foata normal form. 48/8166 useless extension candidates. Maximal degree in co-relation 63026. Up to 5282 conditions per place. [2024-06-21 19:39:44,450 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 283 selfloop transitions, 179 changer transitions 0/467 dead transitions. [2024-06-21 19:39:44,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 467 transitions, 9375 flow [2024-06-21 19:39:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:39:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:39:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-21 19:39:44,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-21 19:39:44,468 INFO L175 Difference]: Start difference. First operand has 218 places, 394 transitions, 7696 flow. Second operand 11 states and 222 transitions. [2024-06-21 19:39:44,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 467 transitions, 9375 flow [2024-06-21 19:39:45,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 467 transitions, 9153 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:39:45,187 INFO L231 Difference]: Finished difference. Result has 225 places, 397 transitions, 7975 flow [2024-06-21 19:39:45,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7474, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7975, PETRI_PLACES=225, PETRI_TRANSITIONS=397} [2024-06-21 19:39:45,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 19:39:45,188 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 397 transitions, 7975 flow [2024-06-21 19:39:45,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:45,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:45,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:45,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:39:45,189 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:45,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2114921771, now seen corresponding path program 10 times [2024-06-21 19:39:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:45,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231921381] [2024-06-21 19:39:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:47,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231921381] [2024-06-21 19:39:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231921381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370653068] [2024-06-21 19:39:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:47,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:47,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 397 transitions, 7975 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:50,318 INFO L124 PetriNetUnfolderBase]: 4836/8027 cut-off events. [2024-06-21 19:39:50,318 INFO L125 PetriNetUnfolderBase]: For 396501/396501 co-relation queries the response was YES. [2024-06-21 19:39:50,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61016 conditions, 8027 events. 4836/8027 cut-off events. For 396501/396501 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 55087 event pairs, 1249 based on Foata normal form. 72/8096 useless extension candidates. Maximal degree in co-relation 60910. Up to 6326 conditions per place. [2024-06-21 19:39:50,409 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 293 selfloop transitions, 160 changer transitions 0/458 dead transitions. [2024-06-21 19:39:50,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 458 transitions, 9440 flow [2024-06-21 19:39:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:39:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:39:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 19:39:50,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 19:39:50,413 INFO L175 Difference]: Start difference. First operand has 225 places, 397 transitions, 7975 flow. Second operand 11 states and 217 transitions. [2024-06-21 19:39:50,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 458 transitions, 9440 flow [2024-06-21 19:39:51,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 458 transitions, 9034 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 19:39:51,454 INFO L231 Difference]: Finished difference. Result has 228 places, 400 transitions, 7998 flow [2024-06-21 19:39:51,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7574, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7998, PETRI_PLACES=228, PETRI_TRANSITIONS=400} [2024-06-21 19:39:51,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 19:39:51,455 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 400 transitions, 7998 flow [2024-06-21 19:39:51,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:51,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:51,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:51,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:39:51,456 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:51,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2059085995, now seen corresponding path program 11 times [2024-06-21 19:39:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:51,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594859063] [2024-06-21 19:39:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:53,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:53,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594859063] [2024-06-21 19:39:53,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594859063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:53,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:53,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:39:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254440121] [2024-06-21 19:39:53,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:53,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:39:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:39:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:39:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:39:53,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 400 transitions, 7998 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:53,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:53,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:39:53,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:55,460 INFO L124 PetriNetUnfolderBase]: 3575/6634 cut-off events. [2024-06-21 19:39:55,460 INFO L125 PetriNetUnfolderBase]: For 261694/261963 co-relation queries the response was YES. [2024-06-21 19:39:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48979 conditions, 6634 events. 3575/6634 cut-off events. For 261694/261963 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 51014 event pairs, 369 based on Foata normal form. 145/6571 useless extension candidates. Maximal degree in co-relation 48873. Up to 2474 conditions per place. [2024-06-21 19:39:55,528 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 176 changer transitions 0/467 dead transitions. [2024-06-21 19:39:55,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 467 transitions, 9351 flow [2024-06-21 19:39:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:39:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:39:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 19:39:55,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-21 19:39:55,530 INFO L175 Difference]: Start difference. First operand has 228 places, 400 transitions, 7998 flow. Second operand 10 states and 218 transitions. [2024-06-21 19:39:55,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 467 transitions, 9351 flow [2024-06-21 19:39:56,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 467 transitions, 9111 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 19:39:56,307 INFO L231 Difference]: Finished difference. Result has 231 places, 403 transitions, 8316 flow [2024-06-21 19:39:56,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7758, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8316, PETRI_PLACES=231, PETRI_TRANSITIONS=403} [2024-06-21 19:39:56,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 19:39:56,308 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 403 transitions, 8316 flow [2024-06-21 19:39:56,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:56,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:39:56,309 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:56,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash 926504223, now seen corresponding path program 12 times [2024-06-21 19:39:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669753661] [2024-06-21 19:39:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:59,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669753661] [2024-06-21 19:39:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669753661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:59,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:59,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:39:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624443143] [2024-06-21 19:39:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:39:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:39:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:39:59,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:59,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 403 transitions, 8316 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:39:59,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:59,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:59,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:01,845 INFO L124 PetriNetUnfolderBase]: 4940/8232 cut-off events. [2024-06-21 19:40:01,845 INFO L125 PetriNetUnfolderBase]: For 361930/361940 co-relation queries the response was YES. [2024-06-21 19:40:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62419 conditions, 8232 events. 4940/8232 cut-off events. For 361930/361940 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 57327 event pairs, 1335 based on Foata normal form. 24/8252 useless extension candidates. Maximal degree in co-relation 62311. Up to 7087 conditions per place. [2024-06-21 19:40:01,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 155 changer transitions 0/454 dead transitions. [2024-06-21 19:40:01,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 454 transitions, 9503 flow [2024-06-21 19:40:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:40:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:40:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 19:40:01,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-21 19:40:01,944 INFO L175 Difference]: Start difference. First operand has 231 places, 403 transitions, 8316 flow. Second operand 11 states and 194 transitions. [2024-06-21 19:40:01,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 454 transitions, 9503 flow [2024-06-21 19:40:02,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 454 transitions, 9226 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:40:02,836 INFO L231 Difference]: Finished difference. Result has 233 places, 405 transitions, 8426 flow [2024-06-21 19:40:02,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8426, PETRI_PLACES=233, PETRI_TRANSITIONS=405} [2024-06-21 19:40:02,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 19:40:02,839 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 405 transitions, 8426 flow [2024-06-21 19:40:02,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:40:02,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:02,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:40:02,839 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:02,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash -29308171, now seen corresponding path program 13 times [2024-06-21 19:40:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811026181] [2024-06-21 19:40:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:06,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811026181] [2024-06-21 19:40:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811026181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:40:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191024483] [2024-06-21 19:40:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:06,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:40:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:40:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:40:06,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:06,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 405 transitions, 8426 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:06,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:06,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:06,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:09,686 INFO L124 PetriNetUnfolderBase]: 5028/8345 cut-off events. [2024-06-21 19:40:09,687 INFO L125 PetriNetUnfolderBase]: For 349844/349844 co-relation queries the response was YES. [2024-06-21 19:40:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62355 conditions, 8345 events. 5028/8345 cut-off events. For 349844/349844 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 58073 event pairs, 1380 based on Foata normal form. 16/8353 useless extension candidates. Maximal degree in co-relation 62248. Up to 7239 conditions per place. [2024-06-21 19:40:09,775 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 300 selfloop transitions, 156 changer transitions 0/461 dead transitions. [2024-06-21 19:40:09,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 461 transitions, 9651 flow [2024-06-21 19:40:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:40:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:40:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-21 19:40:09,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:40:09,777 INFO L175 Difference]: Start difference. First operand has 233 places, 405 transitions, 8426 flow. Second operand 12 states and 210 transitions. [2024-06-21 19:40:09,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 461 transitions, 9651 flow [2024-06-21 19:40:10,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 461 transitions, 9173 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-21 19:40:10,745 INFO L231 Difference]: Finished difference. Result has 233 places, 407 transitions, 8339 flow [2024-06-21 19:40:10,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8339, PETRI_PLACES=233, PETRI_TRANSITIONS=407} [2024-06-21 19:40:10,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 19:40:10,745 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 407 transitions, 8339 flow [2024-06-21 19:40:10,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:10,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:10,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:10,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:40:10,746 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:10,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash 920993973, now seen corresponding path program 14 times [2024-06-21 19:40:10,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:10,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5915690] [2024-06-21 19:40:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:14,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5915690] [2024-06-21 19:40:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5915690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:40:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777159595] [2024-06-21 19:40:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:14,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:40:14,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:40:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:40:14,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:14,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 407 transitions, 8339 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:14,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:14,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:14,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:17,151 INFO L124 PetriNetUnfolderBase]: 5042/8379 cut-off events. [2024-06-21 19:40:17,152 INFO L125 PetriNetUnfolderBase]: For 329005/329005 co-relation queries the response was YES. [2024-06-21 19:40:17,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61425 conditions, 8379 events. 5042/8379 cut-off events. For 329005/329005 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58353 event pairs, 1348 based on Foata normal form. 12/8383 useless extension candidates. Maximal degree in co-relation 61318. Up to 7091 conditions per place. [2024-06-21 19:40:17,234 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 304 selfloop transitions, 162 changer transitions 0/471 dead transitions. [2024-06-21 19:40:17,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 471 transitions, 9615 flow [2024-06-21 19:40:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:40:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:40:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 228 transitions. [2024-06-21 19:40:17,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2024-06-21 19:40:17,236 INFO L175 Difference]: Start difference. First operand has 233 places, 407 transitions, 8339 flow. Second operand 13 states and 228 transitions. [2024-06-21 19:40:17,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 471 transitions, 9615 flow [2024-06-21 19:40:18,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 471 transitions, 9305 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 19:40:18,133 INFO L231 Difference]: Finished difference. Result has 238 places, 409 transitions, 8423 flow [2024-06-21 19:40:18,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8029, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8423, PETRI_PLACES=238, PETRI_TRANSITIONS=409} [2024-06-21 19:40:18,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 19:40:18,135 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 409 transitions, 8423 flow [2024-06-21 19:40:18,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:18,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:18,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:18,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:40:18,135 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:18,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash 696615791, now seen corresponding path program 4 times [2024-06-21 19:40:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613375948] [2024-06-21 19:40:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:20,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613375948] [2024-06-21 19:40:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613375948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:20,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:20,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424009425] [2024-06-21 19:40:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:20,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:20,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 409 transitions, 8423 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:40:20,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:23,600 INFO L124 PetriNetUnfolderBase]: 5166/8618 cut-off events. [2024-06-21 19:40:23,601 INFO L125 PetriNetUnfolderBase]: For 330595/330605 co-relation queries the response was YES. [2024-06-21 19:40:23,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61880 conditions, 8618 events. 5166/8618 cut-off events. For 330595/330605 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 60562 event pairs, 1314 based on Foata normal form. 20/8634 useless extension candidates. Maximal degree in co-relation 61772. Up to 6559 conditions per place. [2024-06-21 19:40:23,695 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 169 changer transitions 0/465 dead transitions. [2024-06-21 19:40:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 465 transitions, 9563 flow [2024-06-21 19:40:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:40:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:40:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 19:40:23,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 19:40:23,697 INFO L175 Difference]: Start difference. First operand has 238 places, 409 transitions, 8423 flow. Second operand 11 states and 196 transitions. [2024-06-21 19:40:23,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 465 transitions, 9563 flow [2024-06-21 19:40:24,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 465 transitions, 9191 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 19:40:24,763 INFO L231 Difference]: Finished difference. Result has 239 places, 413 transitions, 8425 flow [2024-06-21 19:40:24,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8425, PETRI_PLACES=239, PETRI_TRANSITIONS=413} [2024-06-21 19:40:24,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 19:40:24,763 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 413 transitions, 8425 flow [2024-06-21 19:40:24,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-21 19:40:24,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:24,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:24,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:40:24,764 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)] === [2024-06-21 19:40:24,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 178732998, now seen corresponding path program 1 times [2024-06-21 19:40:24,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:24,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311193543] [2024-06-21 19:40:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:24,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:26,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:26,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311193543] [2024-06-21 19:40:26,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311193543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:26,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:26,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:40:26,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402465921] [2024-06-21 19:40:26,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:26,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:40:26,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:40:26,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:40:26,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:26,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 413 transitions, 8425 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:26,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:26,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:26,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:29,107 INFO L124 PetriNetUnfolderBase]: 5168/8637 cut-off events. [2024-06-21 19:40:29,107 INFO L125 PetriNetUnfolderBase]: For 327668/327694 co-relation queries the response was YES. [2024-06-21 19:40:29,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62226 conditions, 8637 events. 5168/8637 cut-off events. For 327668/327694 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61031 event pairs, 1664 based on Foata normal form. 20/8634 useless extension candidates. Maximal degree in co-relation 62116. Up to 7902 conditions per place. [2024-06-21 19:40:29,217 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 74 changer transitions 0/454 dead transitions. [2024-06-21 19:40:29,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 454 transitions, 9984 flow [2024-06-21 19:40:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:40:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:40:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 19:40:29,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 19:40:29,219 INFO L175 Difference]: Start difference. First operand has 239 places, 413 transitions, 8425 flow. Second operand 6 states and 109 transitions. [2024-06-21 19:40:29,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 454 transitions, 9984 flow [2024-06-21 19:40:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 454 transitions, 9572 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 19:40:30,131 INFO L231 Difference]: Finished difference. Result has 237 places, 429 transitions, 8554 flow [2024-06-21 19:40:30,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8554, PETRI_PLACES=237, PETRI_TRANSITIONS=429} [2024-06-21 19:40:30,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 19:40:30,132 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 429 transitions, 8554 flow [2024-06-21 19:40:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:30,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:30,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:30,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:40:30,132 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)] === [2024-06-21 19:40:30,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:30,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1049434618, now seen corresponding path program 1 times [2024-06-21 19:40:30,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:30,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326921063] [2024-06-21 19:40:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:33,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:33,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326921063] [2024-06-21 19:40:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326921063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:33,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:40:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193057444] [2024-06-21 19:40:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:40:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:40:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:40:33,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:40:33,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 429 transitions, 8554 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:33,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:33,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:40:33,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:35,702 INFO L124 PetriNetUnfolderBase]: 4945/8318 cut-off events. [2024-06-21 19:40:35,702 INFO L125 PetriNetUnfolderBase]: For 339565/339657 co-relation queries the response was YES. [2024-06-21 19:40:35,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60789 conditions, 8318 events. 4945/8318 cut-off events. For 339565/339657 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 59587 event pairs, 2158 based on Foata normal form. 79/8341 useless extension candidates. Maximal degree in co-relation 60675. Up to 7677 conditions per place. [2024-06-21 19:40:35,800 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 380 selfloop transitions, 15 changer transitions 0/443 dead transitions. [2024-06-21 19:40:35,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 443 transitions, 9436 flow [2024-06-21 19:40:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:40:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:40:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 19:40:35,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:40:35,802 INFO L175 Difference]: Start difference. First operand has 237 places, 429 transitions, 8554 flow. Second operand 6 states and 102 transitions. [2024-06-21 19:40:35,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 443 transitions, 9436 flow [2024-06-21 19:40:36,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 443 transitions, 9388 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-21 19:40:36,687 INFO L231 Difference]: Finished difference. Result has 243 places, 432 transitions, 8599 flow [2024-06-21 19:40:36,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8506, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8599, PETRI_PLACES=243, PETRI_TRANSITIONS=432} [2024-06-21 19:40:36,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 19:40:36,687 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 432 transitions, 8599 flow [2024-06-21 19:40:36,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:36,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:36,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:36,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:40:36,688 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)] === [2024-06-21 19:40:36,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1090046701, now seen corresponding path program 1 times [2024-06-21 19:40:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278065314] [2024-06-21 19:40:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:40,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:40,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278065314] [2024-06-21 19:40:40,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278065314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:40,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:40,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998335213] [2024-06-21 19:40:40,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:40,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:40,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:40:40,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 432 transitions, 8599 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) [2024-06-21 19:40:40,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:40,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:40:40,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:42,859 INFO L124 PetriNetUnfolderBase]: 4994/8384 cut-off events. [2024-06-21 19:40:42,859 INFO L125 PetriNetUnfolderBase]: For 345932/345983 co-relation queries the response was YES. [2024-06-21 19:40:42,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61791 conditions, 8384 events. 4994/8384 cut-off events. For 345932/345983 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59585 event pairs, 1466 based on Foata normal form. 40/8358 useless extension candidates. Maximal degree in co-relation 61672. Up to 7629 conditions per place. [2024-06-21 19:40:42,974 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 60 changer transitions 0/468 dead transitions. [2024-06-21 19:40:42,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 468 transitions, 9856 flow [2024-06-21 19:40:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:40:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:40:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:40:42,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:40:42,976 INFO L175 Difference]: Start difference. First operand has 243 places, 432 transitions, 8599 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:40:42,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 468 transitions, 9856 flow [2024-06-21 19:40:43,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 468 transitions, 9788 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:40:43,902 INFO L231 Difference]: Finished difference. Result has 245 places, 447 transitions, 8919 flow [2024-06-21 19:40:43,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8919, PETRI_PLACES=245, PETRI_TRANSITIONS=447} [2024-06-21 19:40:43,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 19:40:43,903 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 447 transitions, 8919 flow [2024-06-21 19:40:43,903 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) [2024-06-21 19:40:43,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:43,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:43,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:40:43,904 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)] === [2024-06-21 19:40:43,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1827252457, now seen corresponding path program 2 times [2024-06-21 19:40:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282668588] [2024-06-21 19:40:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:47,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282668588] [2024-06-21 19:40:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282668588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:47,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:47,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749135158] [2024-06-21 19:40:47,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:47,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:47,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:40:47,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 447 transitions, 8919 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) [2024-06-21 19:40:47,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:47,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:40:47,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:49,428 INFO L124 PetriNetUnfolderBase]: 5002/8402 cut-off events. [2024-06-21 19:40:49,429 INFO L125 PetriNetUnfolderBase]: For 355856/355905 co-relation queries the response was YES. [2024-06-21 19:40:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62176 conditions, 8402 events. 5002/8402 cut-off events. For 355856/355905 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 59843 event pairs, 1451 based on Foata normal form. 43/8389 useless extension candidates. Maximal degree in co-relation 62055. Up to 7603 conditions per place. [2024-06-21 19:40:49,517 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 348 selfloop transitions, 87 changer transitions 0/483 dead transitions. [2024-06-21 19:40:49,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 483 transitions, 10228 flow [2024-06-21 19:40:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:40:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:40:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:40:49,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:40:49,520 INFO L175 Difference]: Start difference. First operand has 245 places, 447 transitions, 8919 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:40:49,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 483 transitions, 10228 flow [2024-06-21 19:40:50,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 483 transitions, 10153 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 19:40:50,461 INFO L231 Difference]: Finished difference. Result has 255 places, 459 transitions, 9234 flow [2024-06-21 19:40:50,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8854, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9234, PETRI_PLACES=255, PETRI_TRANSITIONS=459} [2024-06-21 19:40:50,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 19:40:50,475 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 459 transitions, 9234 flow [2024-06-21 19:40:50,475 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) [2024-06-21 19:40:50,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:50,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:50,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:40:50,478 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)] === [2024-06-21 19:40:50,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1444309741, now seen corresponding path program 3 times [2024-06-21 19:40:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672546803] [2024-06-21 19:40:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672546803] [2024-06-21 19:40:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672546803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:55,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:40:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696020284] [2024-06-21 19:40:55,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:55,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:40:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:40:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:40:55,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:40:55,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 459 transitions, 9234 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) [2024-06-21 19:40:55,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:55,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:40:55,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:58,492 INFO L124 PetriNetUnfolderBase]: 4989/8390 cut-off events. [2024-06-21 19:40:58,492 INFO L125 PetriNetUnfolderBase]: For 369064/369093 co-relation queries the response was YES. [2024-06-21 19:40:58,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63152 conditions, 8390 events. 4989/8390 cut-off events. For 369064/369093 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 59726 event pairs, 1362 based on Foata normal form. 25/8349 useless extension candidates. Maximal degree in co-relation 63027. Up to 7643 conditions per place. [2024-06-21 19:40:58,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 57 changer transitions 0/471 dead transitions. [2024-06-21 19:40:58,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 471 transitions, 10123 flow [2024-06-21 19:40:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:40:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:40:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 19:40:58,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 19:40:58,595 INFO L175 Difference]: Start difference. First operand has 255 places, 459 transitions, 9234 flow. Second operand 7 states and 118 transitions. [2024-06-21 19:40:58,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 471 transitions, 10123 flow [2024-06-21 19:40:59,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 471 transitions, 9867 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 19:40:59,614 INFO L231 Difference]: Finished difference. Result has 258 places, 459 transitions, 9101 flow [2024-06-21 19:40:59,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8978, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9101, PETRI_PLACES=258, PETRI_TRANSITIONS=459} [2024-06-21 19:40:59,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 19:40:59,615 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 459 transitions, 9101 flow [2024-06-21 19:40:59,615 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) [2024-06-21 19:40:59,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:59,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:59,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:40:59,616 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)] === [2024-06-21 19:40:59,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 900708915, now seen corresponding path program 1 times [2024-06-21 19:40:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:59,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677703945] [2024-06-21 19:40:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:02,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:02,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677703945] [2024-06-21 19:41:02,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677703945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:02,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:02,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:41:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462717893] [2024-06-21 19:41:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:02,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:41:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:41:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:41:02,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:02,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 459 transitions, 9101 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:02,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:02,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:02,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:04,370 INFO L124 PetriNetUnfolderBase]: 5222/8752 cut-off events. [2024-06-21 19:41:04,370 INFO L125 PetriNetUnfolderBase]: For 383902/383962 co-relation queries the response was YES. [2024-06-21 19:41:04,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65006 conditions, 8752 events. 5222/8752 cut-off events. For 383902/383962 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 62205 event pairs, 1603 based on Foata normal form. 45/8783 useless extension candidates. Maximal degree in co-relation 64881. Up to 7972 conditions per place. [2024-06-21 19:41:04,494 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 73 changer transitions 0/488 dead transitions. [2024-06-21 19:41:04,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 488 transitions, 10538 flow [2024-06-21 19:41:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:41:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:41:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 19:41:04,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 19:41:04,497 INFO L175 Difference]: Start difference. First operand has 258 places, 459 transitions, 9101 flow. Second operand 6 states and 109 transitions. [2024-06-21 19:41:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 488 transitions, 10538 flow [2024-06-21 19:41:05,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 488 transitions, 10402 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:05,478 INFO L231 Difference]: Finished difference. Result has 260 places, 462 transitions, 9171 flow [2024-06-21 19:41:05,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8967, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9171, PETRI_PLACES=260, PETRI_TRANSITIONS=462} [2024-06-21 19:41:05,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 19:41:05,479 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 462 transitions, 9171 flow [2024-06-21 19:41:05,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:05,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:05,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:05,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:41:05,479 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)] === [2024-06-21 19:41:05,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1286378991, now seen corresponding path program 2 times [2024-06-21 19:41:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:05,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307690387] [2024-06-21 19:41:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:08,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307690387] [2024-06-21 19:41:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307690387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:08,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:41:08,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154033123] [2024-06-21 19:41:08,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:08,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:41:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:08,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:41:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:41:08,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:08,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 462 transitions, 9171 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:08,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:08,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:08,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:11,013 INFO L124 PetriNetUnfolderBase]: 5224/8736 cut-off events. [2024-06-21 19:41:11,013 INFO L125 PetriNetUnfolderBase]: For 388551/388571 co-relation queries the response was YES. [2024-06-21 19:41:11,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64819 conditions, 8736 events. 5224/8736 cut-off events. For 388551/388571 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 61873 event pairs, 1632 based on Foata normal form. 16/8729 useless extension candidates. Maximal degree in co-relation 64691. Up to 7976 conditions per place. [2024-06-21 19:41:11,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 405 selfloop transitions, 82 changer transitions 0/492 dead transitions. [2024-06-21 19:41:11,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 492 transitions, 10626 flow [2024-06-21 19:41:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 19:41:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:41:11,123 INFO L175 Difference]: Start difference. First operand has 260 places, 462 transitions, 9171 flow. Second operand 8 states and 130 transitions. [2024-06-21 19:41:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 492 transitions, 10626 flow [2024-06-21 19:41:12,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 492 transitions, 10543 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:41:12,137 INFO L231 Difference]: Finished difference. Result has 265 places, 465 transitions, 9305 flow [2024-06-21 19:41:12,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9305, PETRI_PLACES=265, PETRI_TRANSITIONS=465} [2024-06-21 19:41:12,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 19:41:12,137 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 465 transitions, 9305 flow [2024-06-21 19:41:12,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:12,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:12,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:12,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:41:12,138 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)] === [2024-06-21 19:41:12,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1267362733, now seen corresponding path program 1 times [2024-06-21 19:41:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:12,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538888696] [2024-06-21 19:41:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:12,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538888696] [2024-06-21 19:41:14,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538888696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:14,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:14,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:41:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325074966] [2024-06-21 19:41:14,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:14,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:41:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:41:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:41:14,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:14,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 465 transitions, 9305 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:14,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:14,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:14,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:17,517 INFO L124 PetriNetUnfolderBase]: 5221/8731 cut-off events. [2024-06-21 19:41:17,518 INFO L125 PetriNetUnfolderBase]: For 400555/400555 co-relation queries the response was YES. [2024-06-21 19:41:17,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64880 conditions, 8731 events. 5221/8731 cut-off events. For 400555/400555 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61925 event pairs, 2227 based on Foata normal form. 1/8727 useless extension candidates. Maximal degree in co-relation 64750. Up to 8149 conditions per place. [2024-06-21 19:41:17,638 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 43 changer transitions 0/512 dead transitions. [2024-06-21 19:41:17,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 512 transitions, 11201 flow [2024-06-21 19:41:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:41:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:41:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:41:17,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 19:41:17,640 INFO L175 Difference]: Start difference. First operand has 265 places, 465 transitions, 9305 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:41:17,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 512 transitions, 11201 flow [2024-06-21 19:41:18,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 512 transitions, 10916 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:41:18,753 INFO L231 Difference]: Finished difference. Result has 268 places, 487 transitions, 9597 flow [2024-06-21 19:41:18,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9597, PETRI_PLACES=268, PETRI_TRANSITIONS=487} [2024-06-21 19:41:18,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 19:41:18,754 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 487 transitions, 9597 flow [2024-06-21 19:41:18,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:18,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:18,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:18,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:41:18,758 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)] === [2024-06-21 19:41:18,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1827267337, now seen corresponding path program 1 times [2024-06-21 19:41:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:18,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113573438] [2024-06-21 19:41:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:22,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113573438] [2024-06-21 19:41:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113573438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:22,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105809291] [2024-06-21 19:41:22,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:22,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:41:22,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 487 transitions, 9597 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 19:41:22,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:22,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:41:22,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:24,946 INFO L124 PetriNetUnfolderBase]: 4993/8410 cut-off events. [2024-06-21 19:41:24,946 INFO L125 PetriNetUnfolderBase]: For 413023/413107 co-relation queries the response was YES. [2024-06-21 19:41:25,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63677 conditions, 8410 events. 4993/8410 cut-off events. For 413023/413107 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 60282 event pairs, 2110 based on Foata normal form. 72/8426 useless extension candidates. Maximal degree in co-relation 63543. Up to 7720 conditions per place. [2024-06-21 19:41:25,050 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 433 selfloop transitions, 17 changer transitions 0/500 dead transitions. [2024-06-21 19:41:25,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 500 transitions, 10551 flow [2024-06-21 19:41:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:41:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:41:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 19:41:25,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 19:41:25,051 INFO L175 Difference]: Start difference. First operand has 268 places, 487 transitions, 9597 flow. Second operand 8 states and 124 transitions. [2024-06-21 19:41:25,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 500 transitions, 10551 flow [2024-06-21 19:41:26,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 500 transitions, 10478 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-21 19:41:26,018 INFO L231 Difference]: Finished difference. Result has 275 places, 488 transitions, 9581 flow [2024-06-21 19:41:26,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9524, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9581, PETRI_PLACES=275, PETRI_TRANSITIONS=488} [2024-06-21 19:41:26,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 19:41:26,019 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 488 transitions, 9581 flow [2024-06-21 19:41:26,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 19:41:26,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:26,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:41:26,019 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)] === [2024-06-21 19:41:26,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash -568296477, now seen corresponding path program 1 times [2024-06-21 19:41:26,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:26,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630404341] [2024-06-21 19:41:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:26,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630404341] [2024-06-21 19:41:29,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630404341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:29,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:29,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094029430] [2024-06-21 19:41:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:29,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:29,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 488 transitions, 9581 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) [2024-06-21 19:41:29,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:29,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:29,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:32,356 INFO L124 PetriNetUnfolderBase]: 5249/8765 cut-off events. [2024-06-21 19:41:32,357 INFO L125 PetriNetUnfolderBase]: For 414975/414981 co-relation queries the response was YES. [2024-06-21 19:41:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66349 conditions, 8765 events. 5249/8765 cut-off events. For 414975/414981 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 61844 event pairs, 1499 based on Foata normal form. 2/8759 useless extension candidates. Maximal degree in co-relation 66212. Up to 8130 conditions per place. [2024-06-21 19:41:32,470 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 444 selfloop transitions, 74 changer transitions 0/523 dead transitions. [2024-06-21 19:41:32,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 523 transitions, 11075 flow [2024-06-21 19:41:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:41:32,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:41:32,473 INFO L175 Difference]: Start difference. First operand has 275 places, 488 transitions, 9581 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:41:32,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 523 transitions, 11075 flow [2024-06-21 19:41:33,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 523 transitions, 11020 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:33,898 INFO L231 Difference]: Finished difference. Result has 279 places, 504 transitions, 10019 flow [2024-06-21 19:41:33,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9526, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10019, PETRI_PLACES=279, PETRI_TRANSITIONS=504} [2024-06-21 19:41:33,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 19:41:33,899 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 504 transitions, 10019 flow [2024-06-21 19:41:33,899 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) [2024-06-21 19:41:33,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:33,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:33,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:41:33,899 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)] === [2024-06-21 19:41:33,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 803072389, now seen corresponding path program 2 times [2024-06-21 19:41:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:33,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876276432] [2024-06-21 19:41:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:33,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:37,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876276432] [2024-06-21 19:41:37,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876276432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:37,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:37,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233927690] [2024-06-21 19:41:37,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:37,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 504 transitions, 10019 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) [2024-06-21 19:41:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:37,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:37,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:40,115 INFO L124 PetriNetUnfolderBase]: 5246/8762 cut-off events. [2024-06-21 19:41:40,116 INFO L125 PetriNetUnfolderBase]: For 426581/426593 co-relation queries the response was YES. [2024-06-21 19:41:40,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66726 conditions, 8762 events. 5246/8762 cut-off events. For 426581/426593 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61707 event pairs, 1405 based on Foata normal form. 2/8751 useless extension candidates. Maximal degree in co-relation 66587. Up to 8084 conditions per place. [2024-06-21 19:41:40,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 420 selfloop transitions, 108 changer transitions 0/533 dead transitions. [2024-06-21 19:41:40,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 533 transitions, 11659 flow [2024-06-21 19:41:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 19:41:40,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 19:41:40,220 INFO L175 Difference]: Start difference. First operand has 279 places, 504 transitions, 10019 flow. Second operand 9 states and 140 transitions. [2024-06-21 19:41:40,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 533 transitions, 11659 flow [2024-06-21 19:41:41,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 533 transitions, 11528 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 19:41:41,660 INFO L231 Difference]: Finished difference. Result has 287 places, 519 transitions, 10528 flow [2024-06-21 19:41:41,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9888, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10528, PETRI_PLACES=287, PETRI_TRANSITIONS=519} [2024-06-21 19:41:41,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 19:41:41,661 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 519 transitions, 10528 flow [2024-06-21 19:41:41,661 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) [2024-06-21 19:41:41,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:41,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:41:41,662 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)] === [2024-06-21 19:41:41,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -235739647, now seen corresponding path program 3 times [2024-06-21 19:41:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:41,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555335893] [2024-06-21 19:41:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:41,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:45,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:45,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555335893] [2024-06-21 19:41:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555335893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:45,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327504125] [2024-06-21 19:41:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:45,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:45,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:45,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:45,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 519 transitions, 10528 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) [2024-06-21 19:41:45,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:45,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:45,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:48,689 INFO L124 PetriNetUnfolderBase]: 5243/8749 cut-off events. [2024-06-21 19:41:48,690 INFO L125 PetriNetUnfolderBase]: For 439644/439656 co-relation queries the response was YES. [2024-06-21 19:41:48,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67222 conditions, 8749 events. 5243/8749 cut-off events. For 439644/439656 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 61565 event pairs, 1405 based on Foata normal form. 2/8738 useless extension candidates. Maximal degree in co-relation 67080. Up to 8076 conditions per place. [2024-06-21 19:41:48,805 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 429 selfloop transitions, 108 changer transitions 0/542 dead transitions. [2024-06-21 19:41:48,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 542 transitions, 12087 flow [2024-06-21 19:41:48,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:41:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:41:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-21 19:41:48,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:41:48,807 INFO L175 Difference]: Start difference. First operand has 287 places, 519 transitions, 10528 flow. Second operand 11 states and 168 transitions. [2024-06-21 19:41:48,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 542 transitions, 12087 flow [2024-06-21 19:41:50,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 542 transitions, 11793 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:50,419 INFO L231 Difference]: Finished difference. Result has 295 places, 525 transitions, 10664 flow [2024-06-21 19:41:50,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10242, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10664, PETRI_PLACES=295, PETRI_TRANSITIONS=525} [2024-06-21 19:41:50,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 19:41:50,420 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 525 transitions, 10664 flow [2024-06-21 19:41:50,420 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) [2024-06-21 19:41:50,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:50,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:50,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:41:50,420 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)] === [2024-06-21 19:41:50,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash -316227923, now seen corresponding path program 1 times [2024-06-21 19:41:50,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:50,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535809405] [2024-06-21 19:41:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535809405] [2024-06-21 19:41:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535809405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:41:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032596990] [2024-06-21 19:41:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:41:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:41:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:41:54,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:41:54,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 525 transitions, 10664 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 19:41:54,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:54,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:41:54,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:56,654 INFO L124 PetriNetUnfolderBase]: 5015/8425 cut-off events. [2024-06-21 19:41:56,654 INFO L125 PetriNetUnfolderBase]: For 461893/461922 co-relation queries the response was YES. [2024-06-21 19:41:56,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65346 conditions, 8425 events. 5015/8425 cut-off events. For 461893/461922 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 59853 event pairs, 1348 based on Foata normal form. 23/8382 useless extension candidates. Maximal degree in co-relation 65202. Up to 7619 conditions per place. [2024-06-21 19:41:56,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 77 changer transitions 0/535 dead transitions. [2024-06-21 19:41:56,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 535 transitions, 11658 flow [2024-06-21 19:41:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:41:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:41:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 19:41:56,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 19:41:56,755 INFO L175 Difference]: Start difference. First operand has 295 places, 525 transitions, 10664 flow. Second operand 7 states and 115 transitions. [2024-06-21 19:41:56,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 535 transitions, 11658 flow [2024-06-21 19:41:58,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 535 transitions, 11311 flow, removed 97 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:58,098 INFO L231 Difference]: Finished difference. Result has 296 places, 525 transitions, 10506 flow [2024-06-21 19:41:58,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10317, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10506, PETRI_PLACES=296, PETRI_TRANSITIONS=525} [2024-06-21 19:41:58,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 19:41:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 525 transitions, 10506 flow [2024-06-21 19:41:58,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 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) [2024-06-21 19:41:58,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:58,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:58,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:41:58,100 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)] === [2024-06-21 19:41:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash 629816288, now seen corresponding path program 1 times [2024-06-21 19:41:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174074769] [2024-06-21 19:41:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:01,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:01,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174074769] [2024-06-21 19:42:01,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174074769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:01,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:01,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:42:01,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600887641] [2024-06-21 19:42:01,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:42:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:42:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:42:01,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:01,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 525 transitions, 10506 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:01,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:01,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:01,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:03,933 INFO L124 PetriNetUnfolderBase]: 5250/8769 cut-off events. [2024-06-21 19:42:03,934 INFO L125 PetriNetUnfolderBase]: For 469078/469081 co-relation queries the response was YES. [2024-06-21 19:42:04,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67376 conditions, 8769 events. 5250/8769 cut-off events. For 469078/469081 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 62168 event pairs, 2227 based on Foata normal form. 3/8768 useless extension candidates. Maximal degree in co-relation 67232. Up to 8185 conditions per place. [2024-06-21 19:42:04,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 46 changer transitions 0/556 dead transitions. [2024-06-21 19:42:04,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 556 transitions, 12224 flow [2024-06-21 19:42:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:42:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:42:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:42:04,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 19:42:04,067 INFO L175 Difference]: Start difference. First operand has 296 places, 525 transitions, 10506 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:42:04,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 556 transitions, 12224 flow [2024-06-21 19:42:05,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 556 transitions, 12076 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:05,707 INFO L231 Difference]: Finished difference. Result has 298 places, 532 transitions, 10587 flow [2024-06-21 19:42:05,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10370, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10587, PETRI_PLACES=298, PETRI_TRANSITIONS=532} [2024-06-21 19:42:05,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 19:42:05,708 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 532 transitions, 10587 flow [2024-06-21 19:42:05,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:05,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:05,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:42:05,709 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)] === [2024-06-21 19:42:05,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1223050919, now seen corresponding path program 1 times [2024-06-21 19:42:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740678525] [2024-06-21 19:42:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:09,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:09,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740678525] [2024-06-21 19:42:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740678525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:09,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:42:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330277409] [2024-06-21 19:42:09,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:42:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:42:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:42:09,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:09,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 532 transitions, 10587 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:09,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:09,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:09,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:11,984 INFO L124 PetriNetUnfolderBase]: 5247/8763 cut-off events. [2024-06-21 19:42:11,984 INFO L125 PetriNetUnfolderBase]: For 453440/453440 co-relation queries the response was YES. [2024-06-21 19:42:12,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67122 conditions, 8763 events. 5247/8763 cut-off events. For 453440/453440 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 62145 event pairs, 2221 based on Foata normal form. 1/8759 useless extension candidates. Maximal degree in co-relation 66976. Up to 8183 conditions per place. [2024-06-21 19:42:12,110 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 501 selfloop transitions, 50 changer transitions 0/556 dead transitions. [2024-06-21 19:42:12,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 556 transitions, 12088 flow [2024-06-21 19:42:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:42:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:42:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 19:42:12,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 19:42:12,112 INFO L175 Difference]: Start difference. First operand has 298 places, 532 transitions, 10587 flow. Second operand 7 states and 122 transitions. [2024-06-21 19:42:12,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 556 transitions, 12088 flow [2024-06-21 19:42:13,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 556 transitions, 11964 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-21 19:42:13,659 INFO L231 Difference]: Finished difference. Result has 303 places, 533 transitions, 10584 flow [2024-06-21 19:42:13,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10468, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10584, PETRI_PLACES=303, PETRI_TRANSITIONS=533} [2024-06-21 19:42:13,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 19:42:13,659 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 533 transitions, 10584 flow [2024-06-21 19:42:13,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:13,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:13,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:13,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:42:13,660 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)] === [2024-06-21 19:42:13,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:13,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1742070740, now seen corresponding path program 2 times [2024-06-21 19:42:13,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:13,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992991155] [2024-06-21 19:42:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:13,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992991155] [2024-06-21 19:42:16,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992991155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:16,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:16,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:42:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361662556] [2024-06-21 19:42:16,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:42:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:42:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:42:17,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:17,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 533 transitions, 10584 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:17,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:17,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:17,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:20,265 INFO L124 PetriNetUnfolderBase]: 5252/8761 cut-off events. [2024-06-21 19:42:20,265 INFO L125 PetriNetUnfolderBase]: For 467451/467451 co-relation queries the response was YES. [2024-06-21 19:42:20,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67330 conditions, 8761 events. 5252/8761 cut-off events. For 467451/467451 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 61994 event pairs, 2224 based on Foata normal form. 1/8757 useless extension candidates. Maximal degree in co-relation 67181. Up to 8187 conditions per place. [2024-06-21 19:42:20,381 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 58 changer transitions 0/566 dead transitions. [2024-06-21 19:42:20,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 566 transitions, 12440 flow [2024-06-21 19:42:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:42:20,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:42:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-21 19:42:20,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3658008658008658 [2024-06-21 19:42:20,383 INFO L175 Difference]: Start difference. First operand has 303 places, 533 transitions, 10584 flow. Second operand 11 states and 169 transitions. [2024-06-21 19:42:20,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 566 transitions, 12440 flow [2024-06-21 19:42:21,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 566 transitions, 12338 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 19:42:21,744 INFO L231 Difference]: Finished difference. Result has 311 places, 540 transitions, 10746 flow [2024-06-21 19:42:21,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10490, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10746, PETRI_PLACES=311, PETRI_TRANSITIONS=540} [2024-06-21 19:42:21,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 19:42:21,745 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 540 transitions, 10746 flow [2024-06-21 19:42:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:21,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:21,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:21,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:42:21,746 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)] === [2024-06-21 19:42:21,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 633535358, now seen corresponding path program 3 times [2024-06-21 19:42:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:21,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872082709] [2024-06-21 19:42:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872082709] [2024-06-21 19:42:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872082709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:25,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:42:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558329647] [2024-06-21 19:42:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:25,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:42:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:42:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:42:25,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:25,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 540 transitions, 10746 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:25,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:25,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:25,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:28,243 INFO L124 PetriNetUnfolderBase]: 5249/8757 cut-off events. [2024-06-21 19:42:28,243 INFO L125 PetriNetUnfolderBase]: For 478880/478880 co-relation queries the response was YES. [2024-06-21 19:42:28,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67588 conditions, 8757 events. 5249/8757 cut-off events. For 478880/478880 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 61940 event pairs, 2224 based on Foata normal form. 1/8753 useless extension candidates. Maximal degree in co-relation 67436. Up to 8185 conditions per place. [2024-06-21 19:42:28,359 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 55 changer transitions 0/563 dead transitions. [2024-06-21 19:42:28,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 563 transitions, 12349 flow [2024-06-21 19:42:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 19:42:28,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 19:42:28,361 INFO L175 Difference]: Start difference. First operand has 311 places, 540 transitions, 10746 flow. Second operand 9 states and 146 transitions. [2024-06-21 19:42:28,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 563 transitions, 12349 flow [2024-06-21 19:42:30,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 563 transitions, 12130 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:30,017 INFO L231 Difference]: Finished difference. Result has 313 places, 540 transitions, 10643 flow [2024-06-21 19:42:30,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10527, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10643, PETRI_PLACES=313, PETRI_TRANSITIONS=540} [2024-06-21 19:42:30,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 19:42:30,018 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 540 transitions, 10643 flow [2024-06-21 19:42:30,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:30,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:30,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:30,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:42:30,019 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)] === [2024-06-21 19:42:30,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1612650239, now seen corresponding path program 2 times [2024-06-21 19:42:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812508917] [2024-06-21 19:42:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812508917] [2024-06-21 19:42:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812508917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:33,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:33,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:42:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914110815] [2024-06-21 19:42:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:33,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:42:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:42:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:42:33,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:33,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 540 transitions, 10643 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:33,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:33,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:33,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:36,232 INFO L124 PetriNetUnfolderBase]: 5259/8782 cut-off events. [2024-06-21 19:42:36,233 INFO L125 PetriNetUnfolderBase]: For 488252/488252 co-relation queries the response was YES. [2024-06-21 19:42:36,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67957 conditions, 8782 events. 5259/8782 cut-off events. For 488252/488252 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 62220 event pairs, 2206 based on Foata normal form. 1/8780 useless extension candidates. Maximal degree in co-relation 67804. Up to 8249 conditions per place. [2024-06-21 19:42:36,356 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 525 selfloop transitions, 34 changer transitions 0/564 dead transitions. [2024-06-21 19:42:36,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 564 transitions, 12258 flow [2024-06-21 19:42:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 19:42:36,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-21 19:42:36,358 INFO L175 Difference]: Start difference. First operand has 313 places, 540 transitions, 10643 flow. Second operand 9 states and 137 transitions. [2024-06-21 19:42:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 564 transitions, 12258 flow [2024-06-21 19:42:38,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 564 transitions, 12163 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:38,051 INFO L231 Difference]: Finished difference. Result has 316 places, 546 transitions, 10780 flow [2024-06-21 19:42:38,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10556, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10780, PETRI_PLACES=316, PETRI_TRANSITIONS=546} [2024-06-21 19:42:38,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 19:42:38,052 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 546 transitions, 10780 flow [2024-06-21 19:42:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:38,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:38,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:42:38,053 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)] === [2024-06-21 19:42:38,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1837269539, now seen corresponding path program 3 times [2024-06-21 19:42:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:38,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455187342] [2024-06-21 19:42:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:41,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455187342] [2024-06-21 19:42:41,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455187342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:41,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:41,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:42:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530312689] [2024-06-21 19:42:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:42:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:41,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:42:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:42:41,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:41,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 546 transitions, 10780 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:41,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:41,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:41,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:44,769 INFO L124 PetriNetUnfolderBase]: 5256/8773 cut-off events. [2024-06-21 19:42:44,769 INFO L125 PetriNetUnfolderBase]: For 498782/498782 co-relation queries the response was YES. [2024-06-21 19:42:44,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68014 conditions, 8773 events. 5256/8773 cut-off events. For 498782/498782 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 62104 event pairs, 2214 based on Foata normal form. 1/8771 useless extension candidates. Maximal degree in co-relation 67859. Up to 8247 conditions per place. [2024-06-21 19:42:44,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 526 selfloop transitions, 33 changer transitions 0/564 dead transitions. [2024-06-21 19:42:44,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 564 transitions, 12132 flow [2024-06-21 19:42:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-21 19:42:44,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-21 19:42:44,889 INFO L175 Difference]: Start difference. First operand has 316 places, 546 transitions, 10780 flow. Second operand 10 states and 146 transitions. [2024-06-21 19:42:44,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 564 transitions, 12132 flow [2024-06-21 19:42:46,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 564 transitions, 11930 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 19:42:46,571 INFO L231 Difference]: Finished difference. Result has 319 places, 547 transitions, 10679 flow [2024-06-21 19:42:46,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10578, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10679, PETRI_PLACES=319, PETRI_TRANSITIONS=547} [2024-06-21 19:42:46,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 19:42:46,572 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 547 transitions, 10679 flow [2024-06-21 19:42:46,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:46,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:46,572 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] [2024-06-21 19:42:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:42:46,573 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)] === [2024-06-21 19:42:46,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -730041130, now seen corresponding path program 1 times [2024-06-21 19:42:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:46,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241238058] [2024-06-21 19:42:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241238058] [2024-06-21 19:42:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241238058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:51,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:51,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:42:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435909631] [2024-06-21 19:42:51,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:51,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:42:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:42:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:42:51,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:51,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 547 transitions, 10679 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) [2024-06-21 19:42:51,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:51,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:51,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:54,457 INFO L124 PetriNetUnfolderBase]: 5269/8785 cut-off events. [2024-06-21 19:42:54,457 INFO L125 PetriNetUnfolderBase]: For 511654/511662 co-relation queries the response was YES. [2024-06-21 19:42:54,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68329 conditions, 8785 events. 5269/8785 cut-off events. For 511654/511662 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 61919 event pairs, 1524 based on Foata normal form. 4/8781 useless extension candidates. Maximal degree in co-relation 68172. Up to 8085 conditions per place. [2024-06-21 19:42:54,580 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 96 changer transitions 0/586 dead transitions. [2024-06-21 19:42:54,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 586 transitions, 12217 flow [2024-06-21 19:42:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:42:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:42:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:42:54,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:42:54,582 INFO L175 Difference]: Start difference. First operand has 319 places, 547 transitions, 10679 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:42:54,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 586 transitions, 12217 flow [2024-06-21 19:42:56,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 586 transitions, 12150 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:42:56,542 INFO L231 Difference]: Finished difference. Result has 324 places, 553 transitions, 10959 flow [2024-06-21 19:42:56,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10612, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10959, PETRI_PLACES=324, PETRI_TRANSITIONS=553} [2024-06-21 19:42:56,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 19:42:56,543 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 553 transitions, 10959 flow [2024-06-21 19:42:56,543 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) [2024-06-21 19:42:56,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:56,544 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] [2024-06-21 19:42:56,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:42:56,544 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)] === [2024-06-21 19:42:56,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash -366434674, now seen corresponding path program 2 times [2024-06-21 19:42:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:56,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067433094] [2024-06-21 19:42:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067433094] [2024-06-21 19:43:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067433094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072354407] [2024-06-21 19:43:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:01,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:01,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:01,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:01,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 553 transitions, 10959 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) [2024-06-21 19:43:01,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:01,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:01,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:04,635 INFO L124 PetriNetUnfolderBase]: 5318/8842 cut-off events. [2024-06-21 19:43:04,635 INFO L125 PetriNetUnfolderBase]: For 545036/545058 co-relation queries the response was YES. [2024-06-21 19:43:04,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70708 conditions, 8842 events. 5318/8842 cut-off events. For 545036/545058 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 62212 event pairs, 1409 based on Foata normal form. 4/8832 useless extension candidates. Maximal degree in co-relation 70549. Up to 7570 conditions per place. [2024-06-21 19:43:04,761 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 393 selfloop transitions, 211 changer transitions 0/609 dead transitions. [2024-06-21 19:43:04,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 609 transitions, 13111 flow [2024-06-21 19:43:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:43:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:43:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 19:43:04,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 19:43:04,763 INFO L175 Difference]: Start difference. First operand has 324 places, 553 transitions, 10959 flow. Second operand 8 states and 151 transitions. [2024-06-21 19:43:04,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 609 transitions, 13111 flow [2024-06-21 19:43:06,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 609 transitions, 12936 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:43:06,739 INFO L231 Difference]: Finished difference. Result has 328 places, 575 transitions, 11706 flow [2024-06-21 19:43:06,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10784, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11706, PETRI_PLACES=328, PETRI_TRANSITIONS=575} [2024-06-21 19:43:06,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 19:43:06,740 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 575 transitions, 11706 flow [2024-06-21 19:43:06,740 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) [2024-06-21 19:43:06,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:06,741 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] [2024-06-21 19:43:06,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:43:06,741 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)] === [2024-06-21 19:43:06,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1151467904, now seen corresponding path program 3 times [2024-06-21 19:43:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:06,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138961314] [2024-06-21 19:43:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:11,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:11,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138961314] [2024-06-21 19:43:11,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138961314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:11,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:11,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:11,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279430492] [2024-06-21 19:43:11,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:11,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:11,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:11,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 575 transitions, 11706 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) [2024-06-21 19:43:11,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:11,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:11,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:14,416 INFO L124 PetriNetUnfolderBase]: 5323/8845 cut-off events. [2024-06-21 19:43:14,416 INFO L125 PetriNetUnfolderBase]: For 571563/571585 co-relation queries the response was YES. [2024-06-21 19:43:14,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73246 conditions, 8845 events. 5323/8845 cut-off events. For 571563/571585 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 62345 event pairs, 1399 based on Foata normal form. 4/8835 useless extension candidates. Maximal degree in co-relation 73081. Up to 7574 conditions per place. [2024-06-21 19:43:14,553 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 389 selfloop transitions, 215 changer transitions 0/609 dead transitions. [2024-06-21 19:43:14,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 609 transitions, 13603 flow [2024-06-21 19:43:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:43:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:43:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 19:43:14,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:43:14,556 INFO L175 Difference]: Start difference. First operand has 328 places, 575 transitions, 11706 flow. Second operand 8 states and 147 transitions. [2024-06-21 19:43:14,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 609 transitions, 13603 flow [2024-06-21 19:43:16,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 609 transitions, 13454 flow, removed 72 selfloop flow, removed 1 redundant places. [2024-06-21 19:43:16,798 INFO L231 Difference]: Finished difference. Result has 335 places, 578 transitions, 12072 flow [2024-06-21 19:43:16,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11581, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12072, PETRI_PLACES=335, PETRI_TRANSITIONS=578} [2024-06-21 19:43:16,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 19:43:16,799 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 578 transitions, 12072 flow [2024-06-21 19:43:16,799 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) [2024-06-21 19:43:16,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:16,800 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] [2024-06-21 19:43:16,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:43:16,800 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)] === [2024-06-21 19:43:16,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1322169962, now seen corresponding path program 1 times [2024-06-21 19:43:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:16,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862645769] [2024-06-21 19:43:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:16,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:21,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862645769] [2024-06-21 19:43:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862645769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:21,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:21,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483670243] [2024-06-21 19:43:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:21,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:21,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:21,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:21,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 578 transitions, 12072 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) [2024-06-21 19:43:21,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:21,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:21,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:25,000 INFO L124 PetriNetUnfolderBase]: 5391/8973 cut-off events. [2024-06-21 19:43:25,000 INFO L125 PetriNetUnfolderBase]: For 596184/596213 co-relation queries the response was YES. [2024-06-21 19:43:25,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74232 conditions, 8973 events. 5391/8973 cut-off events. For 596184/596213 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63448 event pairs, 1604 based on Foata normal form. 19/8983 useless extension candidates. Maximal degree in co-relation 74064. Up to 8086 conditions per place. [2024-06-21 19:43:25,123 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 138 changer transitions 0/644 dead transitions. [2024-06-21 19:43:25,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 644 transitions, 14553 flow [2024-06-21 19:43:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 19:43:25,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 19:43:25,125 INFO L175 Difference]: Start difference. First operand has 335 places, 578 transitions, 12072 flow. Second operand 10 states and 171 transitions. [2024-06-21 19:43:25,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 644 transitions, 14553 flow [2024-06-21 19:43:27,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 644 transitions, 14149 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:43:27,264 INFO L231 Difference]: Finished difference. Result has 342 places, 606 transitions, 12519 flow [2024-06-21 19:43:27,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11668, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12519, PETRI_PLACES=342, PETRI_TRANSITIONS=606} [2024-06-21 19:43:27,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 19:43:27,265 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 606 transitions, 12519 flow [2024-06-21 19:43:27,265 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) [2024-06-21 19:43:27,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:27,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:43:27,265 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)] === [2024-06-21 19:43:27,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash -437319538, now seen corresponding path program 2 times [2024-06-21 19:43:27,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:27,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824403224] [2024-06-21 19:43:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:27,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:32,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824403224] [2024-06-21 19:43:32,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824403224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:32,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:32,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509224516] [2024-06-21 19:43:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:32,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:32,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:32,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:32,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 606 transitions, 12519 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) [2024-06-21 19:43:32,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:32,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:32,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:36,047 INFO L124 PetriNetUnfolderBase]: 5510/9132 cut-off events. [2024-06-21 19:43:36,047 INFO L125 PetriNetUnfolderBase]: For 632602/632608 co-relation queries the response was YES. [2024-06-21 19:43:36,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77625 conditions, 9132 events. 5510/9132 cut-off events. For 632602/632608 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 64202 event pairs, 1490 based on Foata normal form. 5/9129 useless extension candidates. Maximal degree in co-relation 77454. Up to 8314 conditions per place. [2024-06-21 19:43:36,198 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 540 selfloop transitions, 129 changer transitions 0/674 dead transitions. [2024-06-21 19:43:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 674 transitions, 15171 flow [2024-06-21 19:43:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:43:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:43:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 19:43:36,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:43:36,200 INFO L175 Difference]: Start difference. First operand has 342 places, 606 transitions, 12519 flow. Second operand 12 states and 192 transitions. [2024-06-21 19:43:36,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 674 transitions, 15171 flow [2024-06-21 19:43:38,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 674 transitions, 14801 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-21 19:43:38,395 INFO L231 Difference]: Finished difference. Result has 349 places, 638 transitions, 13234 flow [2024-06-21 19:43:38,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13234, PETRI_PLACES=349, PETRI_TRANSITIONS=638} [2024-06-21 19:43:38,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-21 19:43:38,396 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 638 transitions, 13234 flow [2024-06-21 19:43:38,396 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) [2024-06-21 19:43:38,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:38,396 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] [2024-06-21 19:43:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:43:38,397 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)] === [2024-06-21 19:43:38,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash -437319910, now seen corresponding path program 4 times [2024-06-21 19:43:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777018101] [2024-06-21 19:43:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:43,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777018101] [2024-06-21 19:43:43,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777018101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:43,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:43,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110081314] [2024-06-21 19:43:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:43,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:43,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 638 transitions, 13234 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) [2024-06-21 19:43:43,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:43,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:46,087 INFO L124 PetriNetUnfolderBase]: 5523/9162 cut-off events. [2024-06-21 19:43:46,087 INFO L125 PetriNetUnfolderBase]: For 645205/645211 co-relation queries the response was YES. [2024-06-21 19:43:46,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78047 conditions, 9162 events. 5523/9162 cut-off events. For 645205/645211 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 64588 event pairs, 1499 based on Foata normal form. 2/9156 useless extension candidates. Maximal degree in co-relation 77875. Up to 8497 conditions per place. [2024-06-21 19:43:46,208 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 581 selfloop transitions, 78 changer transitions 0/664 dead transitions. [2024-06-21 19:43:46,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 664 transitions, 14874 flow [2024-06-21 19:43:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:43:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:43:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 19:43:46,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-21 19:43:46,210 INFO L175 Difference]: Start difference. First operand has 349 places, 638 transitions, 13234 flow. Second operand 10 states and 157 transitions. [2024-06-21 19:43:46,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 664 transitions, 14874 flow [2024-06-21 19:43:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 664 transitions, 14683 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 19:43:48,739 INFO L231 Difference]: Finished difference. Result has 355 places, 644 transitions, 13349 flow [2024-06-21 19:43:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13043, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13349, PETRI_PLACES=355, PETRI_TRANSITIONS=644} [2024-06-21 19:43:48,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 19:43:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 644 transitions, 13349 flow [2024-06-21 19:43:48,740 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) [2024-06-21 19:43:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:48,740 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] [2024-06-21 19:43:48,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:43:48,740 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)] === [2024-06-21 19:43:48,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -437082388, now seen corresponding path program 3 times [2024-06-21 19:43:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762974438] [2024-06-21 19:43:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:48,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:53,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:53,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762974438] [2024-06-21 19:43:53,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762974438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:53,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:43:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788288959] [2024-06-21 19:43:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:43:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:43:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:43:53,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:53,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 644 transitions, 13349 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) [2024-06-21 19:43:53,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:53,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:53,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:56,972 INFO L124 PetriNetUnfolderBase]: 5511/9135 cut-off events. [2024-06-21 19:43:56,972 INFO L125 PetriNetUnfolderBase]: For 660663/660669 co-relation queries the response was YES. [2024-06-21 19:43:57,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77869 conditions, 9135 events. 5511/9135 cut-off events. For 660663/660669 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 64307 event pairs, 1480 based on Foata normal form. 5/9132 useless extension candidates. Maximal degree in co-relation 77694. Up to 8326 conditions per place. [2024-06-21 19:43:57,122 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 121 changer transitions 0/679 dead transitions. [2024-06-21 19:43:57,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 679 transitions, 15255 flow [2024-06-21 19:43:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:43:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:43:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 19:43:57,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 19:43:57,124 INFO L175 Difference]: Start difference. First operand has 355 places, 644 transitions, 13349 flow. Second operand 11 states and 183 transitions. [2024-06-21 19:43:57,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 679 transitions, 15255 flow [2024-06-21 19:43:59,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 679 transitions, 15024 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 19:43:59,619 INFO L231 Difference]: Finished difference. Result has 359 places, 644 transitions, 13381 flow [2024-06-21 19:43:59,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13118, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13381, PETRI_PLACES=359, PETRI_TRANSITIONS=644} [2024-06-21 19:43:59,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 19:43:59,620 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 644 transitions, 13381 flow [2024-06-21 19:43:59,620 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) [2024-06-21 19:43:59,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:59,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:43:59,621 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)] === [2024-06-21 19:43:59,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -437319724, now seen corresponding path program 1 times [2024-06-21 19:43:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658919959] [2024-06-21 19:43:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:04,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658919959] [2024-06-21 19:44:04,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658919959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:04,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:04,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:44:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162107117] [2024-06-21 19:44:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:44:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:44:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:44:04,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:04,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 644 transitions, 13381 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:04,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:04,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:04,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:07,148 INFO L124 PetriNetUnfolderBase]: 5508/9128 cut-off events. [2024-06-21 19:44:07,149 INFO L125 PetriNetUnfolderBase]: For 666228/666234 co-relation queries the response was YES. [2024-06-21 19:44:07,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77993 conditions, 9128 events. 5508/9128 cut-off events. For 666228/666234 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 64233 event pairs, 1500 based on Foata normal form. 2/9122 useless extension candidates. Maximal degree in co-relation 77817. Up to 8492 conditions per place. [2024-06-21 19:44:07,573 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 583 selfloop transitions, 74 changer transitions 0/662 dead transitions. [2024-06-21 19:44:07,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 662 transitions, 14765 flow [2024-06-21 19:44:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:44:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:44:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:44:07,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:44:07,575 INFO L175 Difference]: Start difference. First operand has 359 places, 644 transitions, 13381 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:44:07,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 662 transitions, 14765 flow [2024-06-21 19:44:09,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 662 transitions, 14465 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-21 19:44:09,974 INFO L231 Difference]: Finished difference. Result has 359 places, 644 transitions, 13248 flow [2024-06-21 19:44:09,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13081, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13248, PETRI_PLACES=359, PETRI_TRANSITIONS=644} [2024-06-21 19:44:09,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 19:44:09,975 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 644 transitions, 13248 flow [2024-06-21 19:44:09,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:09,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:09,976 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] [2024-06-21 19:44:09,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:44:09,976 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)] === [2024-06-21 19:44:09,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash -437073460, now seen corresponding path program 1 times [2024-06-21 19:44:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:09,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104410416] [2024-06-21 19:44:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:09,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:15,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:15,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104410416] [2024-06-21 19:44:15,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104410416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:15,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:15,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477770690] [2024-06-21 19:44:15,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:15,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:15,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:15,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:44:15,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 644 transitions, 13248 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) [2024-06-21 19:44:15,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:15,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:44:15,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:18,312 INFO L124 PetriNetUnfolderBase]: 5337/8898 cut-off events. [2024-06-21 19:44:18,313 INFO L125 PetriNetUnfolderBase]: For 712595/712642 co-relation queries the response was YES. [2024-06-21 19:44:18,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76597 conditions, 8898 events. 5337/8898 cut-off events. For 712595/712642 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 63285 event pairs, 1448 based on Foata normal form. 41/8875 useless extension candidates. Maximal degree in co-relation 76420. Up to 7986 conditions per place. [2024-06-21 19:44:18,449 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 74 changer transitions 0/675 dead transitions. [2024-06-21 19:44:18,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 675 transitions, 14698 flow [2024-06-21 19:44:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:44:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:44:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:44:18,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:44:18,450 INFO L175 Difference]: Start difference. First operand has 359 places, 644 transitions, 13248 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:44:18,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 675 transitions, 14698 flow [2024-06-21 19:44:20,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 675 transitions, 14538 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:44:20,919 INFO L231 Difference]: Finished difference. Result has 360 places, 647 transitions, 13313 flow [2024-06-21 19:44:20,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13088, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13313, PETRI_PLACES=360, PETRI_TRANSITIONS=647} [2024-06-21 19:44:20,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 19:44:20,920 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 647 transitions, 13313 flow [2024-06-21 19:44:20,920 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) [2024-06-21 19:44:20,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:20,921 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] [2024-06-21 19:44:20,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:44:20,921 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)] === [2024-06-21 19:44:20,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:20,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2104916216, now seen corresponding path program 5 times [2024-06-21 19:44:20,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:20,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711129278] [2024-06-21 19:44:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:20,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711129278] [2024-06-21 19:44:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711129278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:25,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:25,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:44:25,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671674479] [2024-06-21 19:44:25,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:25,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:44:25,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:44:25,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:44:25,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:25,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 647 transitions, 13313 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) [2024-06-21 19:44:25,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:25,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:25,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:29,652 INFO L124 PetriNetUnfolderBase]: 5573/9197 cut-off events. [2024-06-21 19:44:29,652 INFO L125 PetriNetUnfolderBase]: For 704343/704357 co-relation queries the response was YES. [2024-06-21 19:44:29,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79047 conditions, 9197 events. 5573/9197 cut-off events. For 704343/704357 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 64512 event pairs, 1407 based on Foata normal form. 4/9150 useless extension candidates. Maximal degree in co-relation 78869. Up to 7924 conditions per place. [2024-06-21 19:44:29,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 243 changer transitions 0/686 dead transitions. [2024-06-21 19:44:29,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 686 transitions, 15515 flow [2024-06-21 19:44:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:44:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:44:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:44:29,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 19:44:29,774 INFO L175 Difference]: Start difference. First operand has 360 places, 647 transitions, 13313 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:44:29,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 686 transitions, 15515 flow [2024-06-21 19:44:32,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 686 transitions, 15385 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:44:32,425 INFO L231 Difference]: Finished difference. Result has 362 places, 657 transitions, 13955 flow [2024-06-21 19:44:32,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13183, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13955, PETRI_PLACES=362, PETRI_TRANSITIONS=657} [2024-06-21 19:44:32,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 19:44:32,426 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 657 transitions, 13955 flow [2024-06-21 19:44:32,426 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) [2024-06-21 19:44:32,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:32,426 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] [2024-06-21 19:44:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:44:32,427 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)] === [2024-06-21 19:44:32,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2053684208, now seen corresponding path program 4 times [2024-06-21 19:44:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:32,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059311951] [2024-06-21 19:44:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059311951] [2024-06-21 19:44:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059311951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:37,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:44:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113534703] [2024-06-21 19:44:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:37,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:44:37,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:44:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:44:37,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:37,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 657 transitions, 13955 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) [2024-06-21 19:44:37,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:37,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:37,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:40,681 INFO L124 PetriNetUnfolderBase]: 5588/9258 cut-off events. [2024-06-21 19:44:40,681 INFO L125 PetriNetUnfolderBase]: For 730502/730520 co-relation queries the response was YES. [2024-06-21 19:44:40,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80208 conditions, 9258 events. 5588/9258 cut-off events. For 730502/730520 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 65472 event pairs, 1667 based on Foata normal form. 14/9249 useless extension candidates. Maximal degree in co-relation 80028. Up to 8460 conditions per place. [2024-06-21 19:44:40,858 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 561 selfloop transitions, 129 changer transitions 0/695 dead transitions. [2024-06-21 19:44:40,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 695 transitions, 16027 flow [2024-06-21 19:44:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 19:44:40,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-21 19:44:40,860 INFO L175 Difference]: Start difference. First operand has 362 places, 657 transitions, 13955 flow. Second operand 10 states and 159 transitions. [2024-06-21 19:44:40,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 695 transitions, 16027 flow [2024-06-21 19:44:43,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 695 transitions, 15899 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-21 19:44:43,987 INFO L231 Difference]: Finished difference. Result has 370 places, 666 transitions, 14295 flow [2024-06-21 19:44:43,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13839, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14295, PETRI_PLACES=370, PETRI_TRANSITIONS=666} [2024-06-21 19:44:43,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 19:44:43,988 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 666 transitions, 14295 flow [2024-06-21 19:44:43,988 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) [2024-06-21 19:44:43,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:43,988 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] [2024-06-21 19:44:43,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:44:43,989 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)] === [2024-06-21 19:44:43,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:43,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2053683836, now seen corresponding path program 6 times [2024-06-21 19:44:43,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:43,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338494999] [2024-06-21 19:44:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:43,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338494999] [2024-06-21 19:44:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338494999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:48,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:44:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045447749] [2024-06-21 19:44:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:44:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:44:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:44:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 666 transitions, 14295 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) [2024-06-21 19:44:48,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:48,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:48,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:52,036 INFO L124 PetriNetUnfolderBase]: 5593/9222 cut-off events. [2024-06-21 19:44:52,036 INFO L125 PetriNetUnfolderBase]: For 745056/745068 co-relation queries the response was YES. [2024-06-21 19:44:52,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80744 conditions, 9222 events. 5593/9222 cut-off events. For 745056/745068 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 64694 event pairs, 1418 based on Foata normal form. 2/9173 useless extension candidates. Maximal degree in co-relation 80561. Up to 7944 conditions per place. [2024-06-21 19:44:52,243 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 441 selfloop transitions, 248 changer transitions 0/694 dead transitions. [2024-06-21 19:44:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 694 transitions, 16291 flow [2024-06-21 19:44:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:44:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:44:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:44:52,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:44:52,245 INFO L175 Difference]: Start difference. First operand has 370 places, 666 transitions, 14295 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:44:52,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 694 transitions, 16291 flow [2024-06-21 19:44:55,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 694 transitions, 16077 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 19:44:55,679 INFO L231 Difference]: Finished difference. Result has 373 places, 669 transitions, 14643 flow [2024-06-21 19:44:55,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14081, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14643, PETRI_PLACES=373, PETRI_TRANSITIONS=669} [2024-06-21 19:44:55,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 19:44:55,680 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 669 transitions, 14643 flow [2024-06-21 19:44:55,680 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) [2024-06-21 19:44:55,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:55,680 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] [2024-06-21 19:44:55,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:44:55,681 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)] === [2024-06-21 19:44:55,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1887020420, now seen corresponding path program 7 times [2024-06-21 19:44:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:55,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67690969] [2024-06-21 19:44:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:00,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67690969] [2024-06-21 19:45:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67690969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:00,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:00,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727654348] [2024-06-21 19:45:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:00,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:00,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:00,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:00,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 669 transitions, 14643 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) [2024-06-21 19:45:00,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:00,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:00,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:03,540 INFO L124 PetriNetUnfolderBase]: 5606/9250 cut-off events. [2024-06-21 19:45:03,540 INFO L125 PetriNetUnfolderBase]: For 764330/764342 co-relation queries the response was YES. [2024-06-21 19:45:03,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81859 conditions, 9250 events. 5606/9250 cut-off events. For 764330/764342 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 64934 event pairs, 1416 based on Foata normal form. 2/9201 useless extension candidates. Maximal degree in co-relation 81674. Up to 7954 conditions per place. [2024-06-21 19:45:03,685 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 424 selfloop transitions, 267 changer transitions 0/696 dead transitions. [2024-06-21 19:45:03,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 696 transitions, 16730 flow [2024-06-21 19:45:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:45:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:45:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:45:03,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:45:03,687 INFO L175 Difference]: Start difference. First operand has 373 places, 669 transitions, 14643 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:45:03,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 696 transitions, 16730 flow [2024-06-21 19:45:06,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 696 transitions, 16177 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 19:45:06,906 INFO L231 Difference]: Finished difference. Result has 377 places, 675 transitions, 14792 flow [2024-06-21 19:45:06,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14099, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14792, PETRI_PLACES=377, PETRI_TRANSITIONS=675} [2024-06-21 19:45:06,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-21 19:45:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 675 transitions, 14792 flow [2024-06-21 19:45:06,907 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) [2024-06-21 19:45:06,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:06,907 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] [2024-06-21 19:45:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:45:06,908 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)] === [2024-06-21 19:45:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1886604338, now seen corresponding path program 5 times [2024-06-21 19:45:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628886534] [2024-06-21 19:45:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:10,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628886534] [2024-06-21 19:45:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628886534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083403504] [2024-06-21 19:45:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:10,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:10,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 675 transitions, 14792 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) [2024-06-21 19:45:10,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:10,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:10,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:14,029 INFO L124 PetriNetUnfolderBase]: 5653/9362 cut-off events. [2024-06-21 19:45:14,029 INFO L125 PetriNetUnfolderBase]: For 799990/799998 co-relation queries the response was YES. [2024-06-21 19:45:14,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83168 conditions, 9362 events. 5653/9362 cut-off events. For 799990/799998 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 66386 event pairs, 1630 based on Foata normal form. 11/9367 useless extension candidates. Maximal degree in co-relation 82981. Up to 8222 conditions per place. [2024-06-21 19:45:14,197 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 237 changer transitions 0/767 dead transitions. [2024-06-21 19:45:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 767 transitions, 18255 flow [2024-06-21 19:45:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:45:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:45:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-21 19:45:14,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:45:14,199 INFO L175 Difference]: Start difference. First operand has 377 places, 675 transitions, 14792 flow. Second operand 12 states and 210 transitions. [2024-06-21 19:45:14,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 767 transitions, 18255 flow [2024-06-21 19:45:17,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 767 transitions, 18007 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 19:45:17,741 INFO L231 Difference]: Finished difference. Result has 390 places, 716 transitions, 16115 flow [2024-06-21 19:45:17,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14544, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16115, PETRI_PLACES=390, PETRI_TRANSITIONS=716} [2024-06-21 19:45:17,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 19:45:17,742 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 716 transitions, 16115 flow [2024-06-21 19:45:17,742 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) [2024-06-21 19:45:17,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:17,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:17,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:45:17,742 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)] === [2024-06-21 19:45:17,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1835489138, now seen corresponding path program 6 times [2024-06-21 19:45:17,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:17,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005034151] [2024-06-21 19:45:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005034151] [2024-06-21 19:45:21,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005034151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:21,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:21,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554732828] [2024-06-21 19:45:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:21,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:21,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 716 transitions, 16115 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) [2024-06-21 19:45:21,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:21,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:21,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:25,367 INFO L124 PetriNetUnfolderBase]: 5647/9366 cut-off events. [2024-06-21 19:45:25,368 INFO L125 PetriNetUnfolderBase]: For 834863/834883 co-relation queries the response was YES. [2024-06-21 19:45:25,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85040 conditions, 9366 events. 5647/9366 cut-off events. For 834863/834883 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 66390 event pairs, 1642 based on Foata normal form. 16/9359 useless extension candidates. Maximal degree in co-relation 84847. Up to 8553 conditions per place. [2024-06-21 19:45:25,527 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 603 selfloop transitions, 131 changer transitions 0/739 dead transitions. [2024-06-21 19:45:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 739 transitions, 17906 flow [2024-06-21 19:45:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:45:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:45:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 19:45:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 19:45:25,529 INFO L175 Difference]: Start difference. First operand has 390 places, 716 transitions, 16115 flow. Second operand 9 states and 141 transitions. [2024-06-21 19:45:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 739 transitions, 17906 flow [2024-06-21 19:45:29,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 739 transitions, 17528 flow, removed 146 selfloop flow, removed 5 redundant places. [2024-06-21 19:45:29,093 INFO L231 Difference]: Finished difference. Result has 394 places, 716 transitions, 16017 flow [2024-06-21 19:45:29,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15747, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16017, PETRI_PLACES=394, PETRI_TRANSITIONS=716} [2024-06-21 19:45:29,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 19:45:29,094 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 716 transitions, 16017 flow [2024-06-21 19:45:29,094 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) [2024-06-21 19:45:29,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:29,094 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] [2024-06-21 19:45:29,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:45:29,094 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)] === [2024-06-21 19:45:29,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1051682662, now seen corresponding path program 7 times [2024-06-21 19:45:29,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:29,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755504316] [2024-06-21 19:45:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:29,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:33,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755504316] [2024-06-21 19:45:33,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755504316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:33,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:33,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:33,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708858536] [2024-06-21 19:45:33,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:33,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:33,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:33,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 716 transitions, 16017 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) [2024-06-21 19:45:33,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:33,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:33,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:37,529 INFO L124 PetriNetUnfolderBase]: 5725/9472 cut-off events. [2024-06-21 19:45:37,529 INFO L125 PetriNetUnfolderBase]: For 872647/872659 co-relation queries the response was YES. [2024-06-21 19:45:37,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86790 conditions, 9472 events. 5725/9472 cut-off events. For 872647/872659 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 66771 event pairs, 1419 based on Foata normal form. 5/9464 useless extension candidates. Maximal degree in co-relation 86597. Up to 8646 conditions per place. [2024-06-21 19:45:37,700 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 615 selfloop transitions, 135 changer transitions 0/755 dead transitions. [2024-06-21 19:45:37,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 755 transitions, 18381 flow [2024-06-21 19:45:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:45:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:45:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 19:45:37,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 19:45:37,701 INFO L175 Difference]: Start difference. First operand has 394 places, 716 transitions, 16017 flow. Second operand 10 states and 164 transitions. [2024-06-21 19:45:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 755 transitions, 18381 flow [2024-06-21 19:45:41,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 755 transitions, 18061 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 19:45:41,601 INFO L231 Difference]: Finished difference. Result has 398 places, 734 transitions, 16406 flow [2024-06-21 19:45:41,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15699, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16406, PETRI_PLACES=398, PETRI_TRANSITIONS=734} [2024-06-21 19:45:41,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 19:45:41,602 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 734 transitions, 16406 flow [2024-06-21 19:45:41,602 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) [2024-06-21 19:45:41,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:41,602 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] [2024-06-21 19:45:41,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:45:41,602 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)] === [2024-06-21 19:45:41,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash 884189128, now seen corresponding path program 8 times [2024-06-21 19:45:41,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:41,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995298184] [2024-06-21 19:45:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995298184] [2024-06-21 19:45:45,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995298184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:45,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:45,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976965332] [2024-06-21 19:45:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:45,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:45,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 734 transitions, 16406 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) [2024-06-21 19:45:45,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:45,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:45,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:48,577 INFO L124 PetriNetUnfolderBase]: 5798/9585 cut-off events. [2024-06-21 19:45:48,577 INFO L125 PetriNetUnfolderBase]: For 900647/900647 co-relation queries the response was YES. [2024-06-21 19:45:48,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88908 conditions, 9585 events. 5798/9585 cut-off events. For 900647/900647 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 67803 event pairs, 1480 based on Foata normal form. 2/9584 useless extension candidates. Maximal degree in co-relation 88713. Up to 8346 conditions per place. [2024-06-21 19:45:48,737 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 517 selfloop transitions, 276 changer transitions 0/798 dead transitions. [2024-06-21 19:45:48,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 798 transitions, 19501 flow [2024-06-21 19:45:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:45:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:45:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 19:45:48,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 19:45:48,739 INFO L175 Difference]: Start difference. First operand has 398 places, 734 transitions, 16406 flow. Second operand 11 states and 183 transitions. [2024-06-21 19:45:48,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 798 transitions, 19501 flow [2024-06-21 19:45:52,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 798 transitions, 19285 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 19:45:52,697 INFO L231 Difference]: Finished difference. Result has 406 places, 769 transitions, 17754 flow [2024-06-21 19:45:52,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16198, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17754, PETRI_PLACES=406, PETRI_TRANSITIONS=769} [2024-06-21 19:45:52,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 19:45:52,698 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 769 transitions, 17754 flow [2024-06-21 19:45:52,698 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) [2024-06-21 19:45:52,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:52,699 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] [2024-06-21 19:45:52,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:45:52,700 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)] === [2024-06-21 19:45:52,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1112493898, now seen corresponding path program 9 times [2024-06-21 19:45:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:52,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963016481] [2024-06-21 19:45:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:52,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:56,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963016481] [2024-06-21 19:45:56,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963016481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:56,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:56,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:45:56,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828133394] [2024-06-21 19:45:56,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:45:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:45:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:45:56,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:56,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 769 transitions, 17754 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) [2024-06-21 19:45:56,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:56,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:56,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:00,309 INFO L124 PetriNetUnfolderBase]: 5858/9672 cut-off events. [2024-06-21 19:46:00,310 INFO L125 PetriNetUnfolderBase]: For 954393/954393 co-relation queries the response was YES. [2024-06-21 19:46:00,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92599 conditions, 9672 events. 5858/9672 cut-off events. For 954393/954393 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 68433 event pairs, 1482 based on Foata normal form. 3/9672 useless extension candidates. Maximal degree in co-relation 92400. Up to 8394 conditions per place. [2024-06-21 19:46:00,487 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 535 selfloop transitions, 311 changer transitions 0/851 dead transitions. [2024-06-21 19:46:00,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 851 transitions, 21269 flow [2024-06-21 19:46:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:46:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:46:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 213 transitions. [2024-06-21 19:46:00,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-06-21 19:46:00,489 INFO L175 Difference]: Start difference. First operand has 406 places, 769 transitions, 17754 flow. Second operand 13 states and 213 transitions. [2024-06-21 19:46:00,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 851 transitions, 21269 flow [2024-06-21 19:46:04,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 851 transitions, 20827 flow, removed 141 selfloop flow, removed 6 redundant places. [2024-06-21 19:46:04,753 INFO L231 Difference]: Finished difference. Result has 415 places, 817 transitions, 19158 flow [2024-06-21 19:46:04,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17416, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19158, PETRI_PLACES=415, PETRI_TRANSITIONS=817} [2024-06-21 19:46:04,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 19:46:04,755 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 817 transitions, 19158 flow [2024-06-21 19:46:04,755 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) [2024-06-21 19:46:04,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:04,755 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] [2024-06-21 19:46:04,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:46:04,755 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)] === [2024-06-21 19:46:04,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -885783310, now seen corresponding path program 8 times [2024-06-21 19:46:04,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:04,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630964656] [2024-06-21 19:46:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630964656] [2024-06-21 19:46:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630964656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:09,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:46:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048776591] [2024-06-21 19:46:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:46:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:46:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:46:09,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:09,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 817 transitions, 19158 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) [2024-06-21 19:46:09,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:09,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:09,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:13,586 INFO L124 PetriNetUnfolderBase]: 5877/9694 cut-off events. [2024-06-21 19:46:13,586 INFO L125 PetriNetUnfolderBase]: For 998038/998050 co-relation queries the response was YES. [2024-06-21 19:46:13,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93971 conditions, 9694 events. 5877/9694 cut-off events. For 998038/998050 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 68306 event pairs, 1409 based on Foata normal form. 2/9683 useless extension candidates. Maximal degree in co-relation 93770. Up to 8920 conditions per place. [2024-06-21 19:46:13,793 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 719 selfloop transitions, 124 changer transitions 0/848 dead transitions. [2024-06-21 19:46:13,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 848 transitions, 21682 flow [2024-06-21 19:46:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:46:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:46:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 19:46:13,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-21 19:46:13,795 INFO L175 Difference]: Start difference. First operand has 415 places, 817 transitions, 19158 flow. Second operand 11 states and 174 transitions. [2024-06-21 19:46:13,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 848 transitions, 21682 flow [2024-06-21 19:46:18,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 848 transitions, 21193 flow, removed 151 selfloop flow, removed 8 redundant places. [2024-06-21 19:46:18,271 INFO L231 Difference]: Finished difference. Result has 420 places, 829 transitions, 19395 flow [2024-06-21 19:46:18,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18669, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19395, PETRI_PLACES=420, PETRI_TRANSITIONS=829} [2024-06-21 19:46:18,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 19:46:18,272 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 829 transitions, 19395 flow [2024-06-21 19:46:18,273 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) [2024-06-21 19:46:18,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:18,273 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] [2024-06-21 19:46:18,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:46:18,273 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)] === [2024-06-21 19:46:18,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash 884414002, now seen corresponding path program 2 times [2024-06-21 19:46:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:18,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350435980] [2024-06-21 19:46:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:18,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:22,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350435980] [2024-06-21 19:46:22,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350435980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:22,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:22,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:22,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379257884] [2024-06-21 19:46:22,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:22,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:22,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:22,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:22,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 829 transitions, 19395 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:22,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:22,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:22,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:25,810 INFO L124 PetriNetUnfolderBase]: 5882/9719 cut-off events. [2024-06-21 19:46:25,810 INFO L125 PetriNetUnfolderBase]: For 1025244/1025256 co-relation queries the response was YES. [2024-06-21 19:46:25,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94211 conditions, 9719 events. 5882/9719 cut-off events. For 1025244/1025256 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 68704 event pairs, 1411 based on Foata normal form. 2/9708 useless extension candidates. Maximal degree in co-relation 94007. Up to 8979 conditions per place. [2024-06-21 19:46:25,955 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 728 selfloop transitions, 112 changer transitions 0/845 dead transitions. [2024-06-21 19:46:25,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 845 transitions, 21357 flow [2024-06-21 19:46:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:46:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:46:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:46:25,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:46:25,958 INFO L175 Difference]: Start difference. First operand has 420 places, 829 transitions, 19395 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:46:25,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 845 transitions, 21357 flow [2024-06-21 19:46:30,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 845 transitions, 20957 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-06-21 19:46:30,055 INFO L231 Difference]: Finished difference. Result has 422 places, 832 transitions, 19305 flow [2024-06-21 19:46:30,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18997, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19305, PETRI_PLACES=422, PETRI_TRANSITIONS=832} [2024-06-21 19:46:30,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 19:46:30,056 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 832 transitions, 19305 flow [2024-06-21 19:46:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:30,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:30,057 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] [2024-06-21 19:46:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:46:30,057 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)] === [2024-06-21 19:46:30,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:30,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1106779978, now seen corresponding path program 10 times [2024-06-21 19:46:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:30,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519612711] [2024-06-21 19:46:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:30,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:33,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519612711] [2024-06-21 19:46:33,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519612711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:33,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:46:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084484337] [2024-06-21 19:46:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:33,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:46:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:46:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:46:33,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:33,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 832 transitions, 19305 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) [2024-06-21 19:46:33,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:33,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:33,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:38,258 INFO L124 PetriNetUnfolderBase]: 5898/9738 cut-off events. [2024-06-21 19:46:38,258 INFO L125 PetriNetUnfolderBase]: For 1008680/1008680 co-relation queries the response was YES. [2024-06-21 19:46:38,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93946 conditions, 9738 events. 5898/9738 cut-off events. For 1008680/1008680 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 68984 event pairs, 1469 based on Foata normal form. 6/9741 useless extension candidates. Maximal degree in co-relation 93741. Up to 8448 conditions per place. [2024-06-21 19:46:38,441 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 563 selfloop transitions, 321 changer transitions 0/889 dead transitions. [2024-06-21 19:46:38,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 889 transitions, 22420 flow [2024-06-21 19:46:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-21 19:46:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-21 19:46:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 256 transitions. [2024-06-21 19:46:38,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:46:38,443 INFO L175 Difference]: Start difference. First operand has 422 places, 832 transitions, 19305 flow. Second operand 16 states and 256 transitions. [2024-06-21 19:46:38,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 889 transitions, 22420 flow [2024-06-21 19:46:43,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 889 transitions, 22190 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:46:43,108 INFO L231 Difference]: Finished difference. Result has 434 places, 854 transitions, 20551 flow [2024-06-21 19:46:43,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19075, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=20551, PETRI_PLACES=434, PETRI_TRANSITIONS=854} [2024-06-21 19:46:43,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 19:46:43,109 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 854 transitions, 20551 flow [2024-06-21 19:46:43,109 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) [2024-06-21 19:46:43,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:43,110 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] [2024-06-21 19:46:43,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:46:43,110 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)] === [2024-06-21 19:46:43,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:43,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2112368245, now seen corresponding path program 1 times [2024-06-21 19:46:43,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:43,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075388751] [2024-06-21 19:46:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:43,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075388751] [2024-06-21 19:46:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075388751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:46,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:46,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:46:46,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008319444] [2024-06-21 19:46:46,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:46,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:46:46,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:46:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:46:46,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:46,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 854 transitions, 20551 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:46,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:46,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:46,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:51,147 INFO L124 PetriNetUnfolderBase]: 5900/9759 cut-off events. [2024-06-21 19:46:51,148 INFO L125 PetriNetUnfolderBase]: For 1056468/1056470 co-relation queries the response was YES. [2024-06-21 19:46:51,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95254 conditions, 9759 events. 5900/9759 cut-off events. For 1056468/1056470 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 69353 event pairs, 1308 based on Foata normal form. 10/9766 useless extension candidates. Maximal degree in co-relation 95045. Up to 8210 conditions per place. [2024-06-21 19:46:51,347 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 500 selfloop transitions, 396 changer transitions 0/901 dead transitions. [2024-06-21 19:46:51,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 901 transitions, 23246 flow [2024-06-21 19:46:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:46:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:46:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 238 transitions. [2024-06-21 19:46:51,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:46:51,350 INFO L175 Difference]: Start difference. First operand has 434 places, 854 transitions, 20551 flow. Second operand 14 states and 238 transitions. [2024-06-21 19:46:51,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 901 transitions, 23246 flow [2024-06-21 19:46:55,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 901 transitions, 22039 flow, removed 431 selfloop flow, removed 9 redundant places. [2024-06-21 19:46:55,557 INFO L231 Difference]: Finished difference. Result has 441 places, 864 transitions, 20572 flow [2024-06-21 19:46:55,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19566, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=20572, PETRI_PLACES=441, PETRI_TRANSITIONS=864} [2024-06-21 19:46:55,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 19:46:55,561 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 864 transitions, 20572 flow [2024-06-21 19:46:55,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:55,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:55,561 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] [2024-06-21 19:46:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:46:55,562 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)] === [2024-06-21 19:46:55,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1051689358, now seen corresponding path program 3 times [2024-06-21 19:46:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:55,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449560441] [2024-06-21 19:46:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:59,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:59,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449560441] [2024-06-21 19:46:59,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449560441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:59,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:59,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753196403] [2024-06-21 19:46:59,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:59,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:59,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 864 transitions, 20572 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:59,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:59,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:59,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:03,167 INFO L124 PetriNetUnfolderBase]: 5894/9739 cut-off events. [2024-06-21 19:47:03,168 INFO L125 PetriNetUnfolderBase]: For 991937/991949 co-relation queries the response was YES. [2024-06-21 19:47:03,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94214 conditions, 9739 events. 5894/9739 cut-off events. For 991937/991949 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 68813 event pairs, 1404 based on Foata normal form. 3/9729 useless extension candidates. Maximal degree in co-relation 94003. Up to 8993 conditions per place. [2024-06-21 19:47:03,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 759 selfloop transitions, 110 changer transitions 0/874 dead transitions. [2024-06-21 19:47:03,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 874 transitions, 22263 flow [2024-06-21 19:47:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:47:03,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:47:03,643 INFO L175 Difference]: Start difference. First operand has 441 places, 864 transitions, 20572 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:47:03,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 874 transitions, 22263 flow [2024-06-21 19:47:07,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 874 transitions, 21668 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 19:47:07,805 INFO L231 Difference]: Finished difference. Result has 439 places, 860 transitions, 20103 flow [2024-06-21 19:47:07,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19869, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20103, PETRI_PLACES=439, PETRI_TRANSITIONS=860} [2024-06-21 19:47:07,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 19:47:07,806 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 860 transitions, 20103 flow [2024-06-21 19:47:07,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:07,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:07,806 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] [2024-06-21 19:47:07,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:47:07,806 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)] === [2024-06-21 19:47:07,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1727810004, now seen corresponding path program 11 times [2024-06-21 19:47:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502025265] [2024-06-21 19:47:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502025265] [2024-06-21 19:47:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502025265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:47:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925955006] [2024-06-21 19:47:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:47:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:47:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:47:12,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:47:12,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 860 transitions, 20103 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) [2024-06-21 19:47:12,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:12,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:47:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:16,452 INFO L124 PetriNetUnfolderBase]: 5882/9717 cut-off events. [2024-06-21 19:47:16,452 INFO L125 PetriNetUnfolderBase]: For 1004255/1004267 co-relation queries the response was YES. [2024-06-21 19:47:16,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93115 conditions, 9717 events. 5882/9717 cut-off events. For 1004255/1004267 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 68720 event pairs, 1401 based on Foata normal form. 5/9709 useless extension candidates. Maximal degree in co-relation 92904. Up to 8877 conditions per place. [2024-06-21 19:47:16,604 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 726 selfloop transitions, 153 changer transitions 0/884 dead transitions. [2024-06-21 19:47:16,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 884 transitions, 22295 flow [2024-06-21 19:47:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:47:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:47:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-21 19:47:16,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-21 19:47:16,606 INFO L175 Difference]: Start difference. First operand has 439 places, 860 transitions, 20103 flow. Second operand 12 states and 190 transitions. [2024-06-21 19:47:16,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 884 transitions, 22295 flow [2024-06-21 19:47:20,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 884 transitions, 22017 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:20,514 INFO L231 Difference]: Finished difference. Result has 443 places, 861 transitions, 20202 flow [2024-06-21 19:47:20,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19825, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20202, PETRI_PLACES=443, PETRI_TRANSITIONS=861} [2024-06-21 19:47:20,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-21 19:47:20,516 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 861 transitions, 20202 flow [2024-06-21 19:47:20,516 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) [2024-06-21 19:47:20,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:20,516 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] [2024-06-21 19:47:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:47:20,517 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)] === [2024-06-21 19:47:20,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1721380914, now seen corresponding path program 12 times [2024-06-21 19:47:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:20,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872947082] [2024-06-21 19:47:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872947082] [2024-06-21 19:47:24,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872947082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:24,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:24,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:47:24,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326840203] [2024-06-21 19:47:24,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:24,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:47:24,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:47:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:47:24,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:47:24,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 861 transitions, 20202 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) [2024-06-21 19:47:24,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:24,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:47:24,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:28,374 INFO L124 PetriNetUnfolderBase]: 5876/9721 cut-off events. [2024-06-21 19:47:28,374 INFO L125 PetriNetUnfolderBase]: For 1006329/1006341 co-relation queries the response was YES. [2024-06-21 19:47:28,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93130 conditions, 9721 events. 5876/9721 cut-off events. For 1006329/1006341 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 68806 event pairs, 1401 based on Foata normal form. 3/9711 useless extension candidates. Maximal degree in co-relation 92919. Up to 8963 conditions per place. [2024-06-21 19:47:28,537 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 748 selfloop transitions, 122 changer transitions 0/875 dead transitions. [2024-06-21 19:47:28,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 875 transitions, 22015 flow [2024-06-21 19:47:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-21 19:47:28,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-21 19:47:28,539 INFO L175 Difference]: Start difference. First operand has 443 places, 861 transitions, 20202 flow. Second operand 10 states and 151 transitions. [2024-06-21 19:47:28,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 875 transitions, 22015 flow [2024-06-21 19:47:32,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 875 transitions, 21561 flow, removed 103 selfloop flow, removed 9 redundant places. [2024-06-21 19:47:32,672 INFO L231 Difference]: Finished difference. Result has 444 places, 861 transitions, 20012 flow [2024-06-21 19:47:32,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19760, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20012, PETRI_PLACES=444, PETRI_TRANSITIONS=861} [2024-06-21 19:47:32,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 19:47:32,673 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 861 transitions, 20012 flow [2024-06-21 19:47:32,673 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) [2024-06-21 19:47:32,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:32,674 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] [2024-06-21 19:47:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:47:32,674 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)] === [2024-06-21 19:47:32,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:32,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1552373122, now seen corresponding path program 9 times [2024-06-21 19:47:32,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:32,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698843644] [2024-06-21 19:47:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:32,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:37,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:37,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698843644] [2024-06-21 19:47:37,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698843644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:37,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:37,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:47:37,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658799333] [2024-06-21 19:47:37,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:37,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:47:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:37,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:47:37,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:47:37,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:47:37,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 861 transitions, 20012 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) [2024-06-21 19:47:37,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:37,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:47:37,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:40,807 INFO L124 PetriNetUnfolderBase]: 5875/9702 cut-off events. [2024-06-21 19:47:40,808 INFO L125 PetriNetUnfolderBase]: For 1021990/1022002 co-relation queries the response was YES. [2024-06-21 19:47:40,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93034 conditions, 9702 events. 5875/9702 cut-off events. For 1021990/1022002 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 68494 event pairs, 1400 based on Foata normal form. 2/9691 useless extension candidates. Maximal degree in co-relation 92822. Up to 8938 conditions per place. [2024-06-21 19:47:40,991 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 747 selfloop transitions, 125 changer transitions 0/877 dead transitions. [2024-06-21 19:47:40,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 877 transitions, 22191 flow [2024-06-21 19:47:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-21 19:47:40,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 19:47:40,994 INFO L175 Difference]: Start difference. First operand has 444 places, 861 transitions, 20012 flow. Second operand 10 states and 152 transitions. [2024-06-21 19:47:40,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 877 transitions, 22191 flow [2024-06-21 19:47:45,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 877 transitions, 21897 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 19:47:45,757 INFO L231 Difference]: Finished difference. Result has 446 places, 862 transitions, 20067 flow [2024-06-21 19:47:45,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19698, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20067, PETRI_PLACES=446, PETRI_TRANSITIONS=862} [2024-06-21 19:47:45,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 19:47:45,758 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 862 transitions, 20067 flow [2024-06-21 19:47:45,758 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) [2024-06-21 19:47:45,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:45,759 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] [2024-06-21 19:47:45,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:47:45,759 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)] === [2024-06-21 19:47:45,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash 707291596, now seen corresponding path program 2 times [2024-06-21 19:47:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:45,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801470637] [2024-06-21 19:47:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801470637] [2024-06-21 19:47:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801470637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:53,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:47:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166878242] [2024-06-21 19:47:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:47:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:47:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:47:53,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:47:53,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 862 transitions, 20067 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) [2024-06-21 19:47:53,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:53,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:47:53,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:57,013 INFO L124 PetriNetUnfolderBase]: 5699/9466 cut-off events. [2024-06-21 19:47:57,014 INFO L125 PetriNetUnfolderBase]: For 1068267/1068316 co-relation queries the response was YES. [2024-06-21 19:47:57,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91400 conditions, 9466 events. 5699/9466 cut-off events. For 1068267/1068316 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 67656 event pairs, 1348 based on Foata normal form. 33/9433 useless extension candidates. Maximal degree in co-relation 91186. Up to 8452 conditions per place. [2024-06-21 19:47:57,195 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 704 selfloop transitions, 66 changer transitions 0/881 dead transitions. [2024-06-21 19:47:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 881 transitions, 21742 flow [2024-06-21 19:47:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:47:57,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:47:57,197 INFO L175 Difference]: Start difference. First operand has 446 places, 862 transitions, 20067 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:47:57,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 881 transitions, 21742 flow [2024-06-21 19:48:02,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 881 transitions, 21445 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:48:02,206 INFO L231 Difference]: Finished difference. Result has 447 places, 863 transitions, 19934 flow [2024-06-21 19:48:02,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19770, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19934, PETRI_PLACES=447, PETRI_TRANSITIONS=863} [2024-06-21 19:48:02,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 19:48:02,207 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 863 transitions, 19934 flow [2024-06-21 19:48:02,207 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) [2024-06-21 19:48:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:02,207 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] [2024-06-21 19:48:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:48:02,208 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)] === [2024-06-21 19:48:02,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -472229980, now seen corresponding path program 3 times [2024-06-21 19:48:02,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:02,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539674107] [2024-06-21 19:48:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:08,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539674107] [2024-06-21 19:48:08,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539674107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:08,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:08,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:48:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493975223] [2024-06-21 19:48:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:08,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:48:08,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:48:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:48:08,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:48:08,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 863 transitions, 19934 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) [2024-06-21 19:48:08,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:08,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:48:08,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:12,221 INFO L124 PetriNetUnfolderBase]: 5713/9497 cut-off events. [2024-06-21 19:48:12,221 INFO L125 PetriNetUnfolderBase]: For 1073391/1073448 co-relation queries the response was YES. [2024-06-21 19:48:12,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91378 conditions, 9497 events. 5713/9497 cut-off events. For 1073391/1073448 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 68040 event pairs, 1434 based on Foata normal form. 43/9490 useless extension candidates. Maximal degree in co-relation 91163. Up to 8413 conditions per place. [2024-06-21 19:48:12,398 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 677 selfloop transitions, 103 changer transitions 0/891 dead transitions. [2024-06-21 19:48:12,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 891 transitions, 21652 flow [2024-06-21 19:48:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:48:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:48:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:48:12,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:48:12,410 INFO L175 Difference]: Start difference. First operand has 447 places, 863 transitions, 19934 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:48:12,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 891 transitions, 21652 flow [2024-06-21 19:48:17,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 891 transitions, 21520 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:48:17,562 INFO L231 Difference]: Finished difference. Result has 451 places, 864 transitions, 20035 flow [2024-06-21 19:48:17,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19802, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20035, PETRI_PLACES=451, PETRI_TRANSITIONS=864} [2024-06-21 19:48:17,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 19:48:17,563 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 864 transitions, 20035 flow [2024-06-21 19:48:17,563 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) [2024-06-21 19:48:17,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:17,563 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] [2024-06-21 19:48:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:48:17,564 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)] === [2024-06-21 19:48:17,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash -963816394, now seen corresponding path program 4 times [2024-06-21 19:48:17,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:17,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369806801] [2024-06-21 19:48:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:17,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:22,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:22,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369806801] [2024-06-21 19:48:22,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369806801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:22,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:22,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:48:22,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160466251] [2024-06-21 19:48:22,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:22,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:48:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:48:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:48:22,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:48:22,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 864 transitions, 20035 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) [2024-06-21 19:48:22,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:22,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:48:22,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:25,436 INFO L124 PetriNetUnfolderBase]: 5806/9648 cut-off events. [2024-06-21 19:48:25,436 INFO L125 PetriNetUnfolderBase]: For 1069674/1069731 co-relation queries the response was YES. [2024-06-21 19:48:25,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92396 conditions, 9648 events. 5806/9648 cut-off events. For 1069674/1069731 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 69158 event pairs, 1434 based on Foata normal form. 39/9637 useless extension candidates. Maximal degree in co-relation 92180. Up to 8357 conditions per place. [2024-06-21 19:48:25,601 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 676 selfloop transitions, 116 changer transitions 0/903 dead transitions. [2024-06-21 19:48:25,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 903 transitions, 22115 flow [2024-06-21 19:48:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:48:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:48:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 19:48:25,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 19:48:25,602 INFO L175 Difference]: Start difference. First operand has 451 places, 864 transitions, 20035 flow. Second operand 10 states and 172 transitions. [2024-06-21 19:48:25,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 903 transitions, 22115 flow [2024-06-21 19:48:31,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 903 transitions, 21926 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:48:31,029 INFO L231 Difference]: Finished difference. Result has 455 places, 873 transitions, 20320 flow [2024-06-21 19:48:31,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19853, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20320, PETRI_PLACES=455, PETRI_TRANSITIONS=873} [2024-06-21 19:48:31,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-21 19:48:31,030 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 873 transitions, 20320 flow [2024-06-21 19:48:31,030 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) [2024-06-21 19:48:31,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:31,030 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] [2024-06-21 19:48:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:48:31,030 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)] === [2024-06-21 19:48:31,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash 990255016, now seen corresponding path program 10 times [2024-06-21 19:48:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:31,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580944490] [2024-06-21 19:48:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:33,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:33,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580944490] [2024-06-21 19:48:33,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580944490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:33,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:33,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:33,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645449001] [2024-06-21 19:48:33,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:33,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:33,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:33,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:33,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 873 transitions, 20320 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:33,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:33,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:33,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:37,770 INFO L124 PetriNetUnfolderBase]: 6189/10178 cut-off events. [2024-06-21 19:48:37,770 INFO L125 PetriNetUnfolderBase]: For 1124465/1124465 co-relation queries the response was YES. [2024-06-21 19:48:37,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98603 conditions, 10178 events. 6189/10178 cut-off events. For 1124465/1124465 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 72349 event pairs, 1400 based on Foata normal form. 3/10178 useless extension candidates. Maximal degree in co-relation 98385. Up to 8628 conditions per place. [2024-06-21 19:48:37,989 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 600 selfloop transitions, 378 changer transitions 0/983 dead transitions. [2024-06-21 19:48:37,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 983 transitions, 24335 flow [2024-06-21 19:48:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:48:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:48:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 19:48:37,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 19:48:37,991 INFO L175 Difference]: Start difference. First operand has 455 places, 873 transitions, 20320 flow. Second operand 11 states and 208 transitions. [2024-06-21 19:48:37,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 983 transitions, 24335 flow [2024-06-21 19:48:43,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 983 transitions, 24034 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 19:48:43,654 INFO L231 Difference]: Finished difference. Result has 462 places, 917 transitions, 21998 flow [2024-06-21 19:48:43,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20075, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21998, PETRI_PLACES=462, PETRI_TRANSITIONS=917} [2024-06-21 19:48:43,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-21 19:48:43,655 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 917 transitions, 21998 flow [2024-06-21 19:48:43,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:43,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:43,655 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] [2024-06-21 19:48:43,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:48:43,656 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)] === [2024-06-21 19:48:43,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1106797128, now seen corresponding path program 11 times [2024-06-21 19:48:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:43,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124500345] [2024-06-21 19:48:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:46,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:46,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124500345] [2024-06-21 19:48:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124500345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:46,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:46,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500238037] [2024-06-21 19:48:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:46,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:46,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:46,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 917 transitions, 21998 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:46,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:46,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:46,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:51,817 INFO L124 PetriNetUnfolderBase]: 6334/10369 cut-off events. [2024-06-21 19:48:51,817 INFO L125 PetriNetUnfolderBase]: For 1211993/1211993 co-relation queries the response was YES. [2024-06-21 19:48:52,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104324 conditions, 10369 events. 6334/10369 cut-off events. For 1211993/1211993 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 73610 event pairs, 1419 based on Foata normal form. 2/10362 useless extension candidates. Maximal degree in co-relation 104103. Up to 8107 conditions per place. [2024-06-21 19:48:52,073 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 604 selfloop transitions, 427 changer transitions 0/1036 dead transitions. [2024-06-21 19:48:52,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1036 transitions, 26395 flow [2024-06-21 19:48:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:48:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:48:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 19:48:52,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 19:48:52,075 INFO L175 Difference]: Start difference. First operand has 462 places, 917 transitions, 21998 flow. Second operand 11 states and 204 transitions. [2024-06-21 19:48:52,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1036 transitions, 26395 flow [2024-06-21 19:48:56,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1036 transitions, 25944 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-21 19:48:56,954 INFO L231 Difference]: Finished difference. Result has 468 places, 950 transitions, 23566 flow [2024-06-21 19:48:56,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21552, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23566, PETRI_PLACES=468, PETRI_TRANSITIONS=950} [2024-06-21 19:48:56,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-21 19:48:56,955 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 950 transitions, 23566 flow [2024-06-21 19:48:56,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:56,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:56,955 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] [2024-06-21 19:48:56,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:48:56,956 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)] === [2024-06-21 19:48:56,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1106498598, now seen corresponding path program 12 times [2024-06-21 19:48:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:56,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151270865] [2024-06-21 19:48:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:56,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:00,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151270865] [2024-06-21 19:49:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151270865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:00,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:00,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:00,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332141737] [2024-06-21 19:49:00,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:00,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:00,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:00,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 950 transitions, 23566 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:00,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:00,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:00,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:05,951 INFO L124 PetriNetUnfolderBase]: 6336/10371 cut-off events. [2024-06-21 19:49:05,951 INFO L125 PetriNetUnfolderBase]: For 1249808/1249808 co-relation queries the response was YES. [2024-06-21 19:49:06,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107655 conditions, 10371 events. 6336/10371 cut-off events. For 1249808/1249808 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 73535 event pairs, 1423 based on Foata normal form. 2/10364 useless extension candidates. Maximal degree in co-relation 107431. Up to 8108 conditions per place. [2024-06-21 19:49:06,182 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 601 selfloop transitions, 429 changer transitions 0/1035 dead transitions. [2024-06-21 19:49:06,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1035 transitions, 27346 flow [2024-06-21 19:49:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:49:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:49:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-21 19:49:06,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 19:49:06,209 INFO L175 Difference]: Start difference. First operand has 468 places, 950 transitions, 23566 flow. Second operand 12 states and 213 transitions. [2024-06-21 19:49:06,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1035 transitions, 27346 flow [2024-06-21 19:49:11,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1035 transitions, 27061 flow, removed 140 selfloop flow, removed 2 redundant places. [2024-06-21 19:49:11,873 INFO L231 Difference]: Finished difference. Result has 478 places, 953 transitions, 24279 flow [2024-06-21 19:49:11,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=23323, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24279, PETRI_PLACES=478, PETRI_TRANSITIONS=953} [2024-06-21 19:49:11,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-21 19:49:11,875 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 953 transitions, 24279 flow [2024-06-21 19:49:11,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:11,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:11,875 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] [2024-06-21 19:49:11,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:49:11,875 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)] === [2024-06-21 19:49:11,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -546840072, now seen corresponding path program 13 times [2024-06-21 19:49:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:11,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362259891] [2024-06-21 19:49:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:15,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362259891] [2024-06-21 19:49:15,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362259891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:15,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:15,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611189293] [2024-06-21 19:49:15,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:15,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:15,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:15,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:15,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 953 transitions, 24279 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:15,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:15,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:15,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:20,130 INFO L124 PetriNetUnfolderBase]: 6338/10419 cut-off events. [2024-06-21 19:49:20,130 INFO L125 PetriNetUnfolderBase]: For 1255025/1255025 co-relation queries the response was YES. [2024-06-21 19:49:20,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108156 conditions, 10419 events. 6338/10419 cut-off events. For 1255025/1255025 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 74205 event pairs, 1549 based on Foata normal form. 2/10418 useless extension candidates. Maximal degree in co-relation 107930. Up to 9458 conditions per place. [2024-06-21 19:49:20,428 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 810 selfloop transitions, 177 changer transitions 0/992 dead transitions. [2024-06-21 19:49:20,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 992 transitions, 26867 flow [2024-06-21 19:49:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:49:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:49:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 19:49:20,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:49:20,432 INFO L175 Difference]: Start difference. First operand has 478 places, 953 transitions, 24279 flow. Second operand 12 states and 195 transitions. [2024-06-21 19:49:20,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 992 transitions, 26867 flow [2024-06-21 19:49:25,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 992 transitions, 26184 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-21 19:49:25,531 INFO L231 Difference]: Finished difference. Result has 485 places, 956 transitions, 24124 flow [2024-06-21 19:49:25,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=23599, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24124, PETRI_PLACES=485, PETRI_TRANSITIONS=956} [2024-06-21 19:49:25,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-21 19:49:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 956 transitions, 24124 flow [2024-06-21 19:49:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:25,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:25,535 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] [2024-06-21 19:49:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:49:25,535 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)] === [2024-06-21 19:49:25,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash -504127032, now seen corresponding path program 5 times [2024-06-21 19:49:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:25,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293633320] [2024-06-21 19:49:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:29,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:29,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293633320] [2024-06-21 19:49:29,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293633320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:29,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:29,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172217333] [2024-06-21 19:49:29,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:29,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:29,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:29,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:49:29,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 956 transitions, 24124 flow. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:29,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:29,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:49:29,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:34,255 INFO L124 PetriNetUnfolderBase]: 6101/10088 cut-off events. [2024-06-21 19:49:34,256 INFO L125 PetriNetUnfolderBase]: For 1302695/1302744 co-relation queries the response was YES. [2024-06-21 19:49:34,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104318 conditions, 10088 events. 6101/10088 cut-off events. For 1302695/1302744 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 72255 event pairs, 1352 based on Foata normal form. 37/10053 useless extension candidates. Maximal degree in co-relation 104090. Up to 8758 conditions per place. [2024-06-21 19:49:34,567 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 746 selfloop transitions, 104 changer transitions 0/973 dead transitions. [2024-06-21 19:49:34,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 973 transitions, 25956 flow [2024-06-21 19:49:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:49:34,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:49:34,568 INFO L175 Difference]: Start difference. First operand has 485 places, 956 transitions, 24124 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:49:34,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 973 transitions, 25956 flow Killed by 15