./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_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/protection/safe019_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/safe019_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe019_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 17:46:15,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:46:15,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:46:15,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:46:15,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:46:15,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:46:15,784 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:46:15,784 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:46:15,785 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:46:15,788 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:46:15,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:46:15,788 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:46:15,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:46:15,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:46:15,790 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:46:15,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:46:15,791 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:46:15,791 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:46:15,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:46:15,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:46:15,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:46:15,793 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:46:15,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:46:15,793 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:46:15,793 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:46:15,793 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:46:15,794 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:46:15,794 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:46:15,794 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:46:15,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:46:15,795 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:46:15,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:46:15,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:46:15,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:46:15,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:46:15,796 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:46:15,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:46:15,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:46:15,797 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:46:15,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:46:15,797 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:46:15,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:46:15,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:46:15,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:46:16,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:46:16,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:46:16,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:46:16,026 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:46:16,027 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:46:16,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-21 17:46:17,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:46:17,312 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:46:17,312 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-21 17:46:17,324 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26162dc83/773a3a80c56b4d47a098f8636b690b96/FLAG52df4fd3b [2024-06-21 17:46:17,338 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26162dc83/773a3a80c56b4d47a098f8636b690b96 [2024-06-21 17:46:17,340 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:46:17,340 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:46:17,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_rmo.oepc.yml/witness.yml [2024-06-21 17:46:17,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:46:17,577 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:46:17,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:46:17,579 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:46:17,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:46:17,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:46:17" (1/2) ... [2024-06-21 17:46:17,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc21548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:46:17, skipping insertion in model container [2024-06-21 17:46:17,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:46:17" (1/2) ... [2024-06-21 17:46:17,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6eedf8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:46:17, skipping insertion in model container [2024-06-21 17:46:17,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:46:17" (2/2) ... [2024-06-21 17:46:17,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc21548 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:46:17, skipping insertion in model container [2024-06-21 17:46:17,587 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:46:17" (2/2) ... [2024-06-21 17:46:17,587 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:46:17,754 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:46:17,755 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:46:17,756 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:46:17,756 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:46:17,756 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:46:17,756 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:46:17,757 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 17:46:17,791 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:46:18,070 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:46:18,077 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:46:18,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:46:18,299 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:46:18,300 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:46:18 WrapperNode [2024-06-21 17:46:18,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:46:18,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:46:18,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:46:18,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:46:18,306 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,332 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,374 INFO L138 Inliner]: procedures = 176, calls = 94, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 256 [2024-06-21 17:46:18,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:46:18,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:46:18,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:46:18,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:46:18,387 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,388 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,392 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,432 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-21 17:46:18,433 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,433 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,450 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,452 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,454 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,455 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:46:18,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:46:18,479 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:46:18,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:46:18,480 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 05:46:18" (1/1) ... [2024-06-21 17:46:18,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:46:18,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:46:18,502 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 17:46:18,521 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 17:46:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:46:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:46:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:46:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:46:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:46:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:46:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:46:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:46:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:46:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:46:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:46:18,539 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:46:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:46:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:46:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:46:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:46:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:46:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:46:18,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:46:18,542 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 17:46:18,684 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:46:18,686 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:46:19,124 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:46:19,124 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:46:19,526 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:46:19,526 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:46:19,527 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:46:19 BoogieIcfgContainer [2024-06-21 17:46:19,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:46:19,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:46:19,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:46:19,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:46:19,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:46:17" (1/4) ... [2024-06-21 17:46:19,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db413fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:46:19, skipping insertion in model container [2024-06-21 17:46:19,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:46:17" (2/4) ... [2024-06-21 17:46:19,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db413fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:46:19, skipping insertion in model container [2024-06-21 17:46:19,533 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 05:46:18" (3/4) ... [2024-06-21 17:46:19,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db413fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:46:19, skipping insertion in model container [2024-06-21 17:46:19,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:46:19" (4/4) ... [2024-06-21 17:46:19,534 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.oepc.i [2024-06-21 17:46:19,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:46:19,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:46:19,549 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:46:19,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:46:19,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:46:19,672 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 17:46:19,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:46:19,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:46:19,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:46:19,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 17:46:19,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:46:19,742 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;@6b95826d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:46:19,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:46:19,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:46:19,771 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:46:19,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:46:19,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:19,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:46:19,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:19,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 778677720, now seen corresponding path program 1 times [2024-06-21 17:46:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:19,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876442389] [2024-06-21 17:46:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:21,724 INFO 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 17:46:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876442389] [2024-06-21 17:46:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876442389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:21,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:21,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:46:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198167359] [2024-06-21 17:46:21,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:21,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:46:21,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:46:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:46:21,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:46:21,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:21,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:21,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:46:21,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:22,915 INFO L124 PetriNetUnfolderBase]: 4366/6138 cut-off events. [2024-06-21 17:46:22,916 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-21 17:46:22,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 6138 events. 4366/6138 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32201 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-21 17:46:22,944 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-21 17:46:22,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 239 flow [2024-06-21 17:46:22,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:46:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:46:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-21 17:46:22,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 17:46:22,954 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-21 17:46:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 239 flow [2024-06-21 17:46:22,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:46:22,958 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 17:46:22,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 17:46:22,962 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 17:46:22,962 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 17:46:22,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:22,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:22,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:22,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:46:22,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:22,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash 985009335, now seen corresponding path program 1 times [2024-06-21 17:46:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:22,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803052009] [2024-06-21 17:46:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:22,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:25,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:25,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803052009] [2024-06-21 17:46:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803052009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:25,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:25,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:46:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843757247] [2024-06-21 17:46:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:25,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:46:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:46:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:46:25,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:46:25,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 17:46:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:25,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:46:25,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:26,485 INFO L124 PetriNetUnfolderBase]: 4356/6125 cut-off events. [2024-06-21 17:46:26,485 INFO L125 PetriNetUnfolderBase]: For 1244/1254 co-relation queries the response was YES. [2024-06-21 17:46:26,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14294 conditions, 6125 events. 4356/6125 cut-off events. For 1244/1254 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32007 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-21 17:46:26,517 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-21 17:46:26,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 343 flow [2024-06-21 17:46:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:46:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:46:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 17:46:26,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-21 17:46:26,519 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-21 17:46:26,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 343 flow [2024-06-21 17:46:26,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:46:26,522 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 17:46:26,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 17:46:26,522 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 17:46:26,523 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 17:46:26,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 17:46:26,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:26,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:26,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:46:26,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:26,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1197522764, now seen corresponding path program 1 times [2024-06-21 17:46:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:26,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480948914] [2024-06-21 17:46:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:29,169 INFO 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 17:46:29,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:29,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480948914] [2024-06-21 17:46:29,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480948914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:29,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:29,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:46:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778632018] [2024-06-21 17:46:29,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:46:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:46:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:46:29,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:46:29,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:29,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:29,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:46:29,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:30,925 INFO L124 PetriNetUnfolderBase]: 5530/7706 cut-off events. [2024-06-21 17:46:30,925 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-21 17:46:30,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 7706 events. 5530/7706 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39846 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-21 17:46:30,964 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-21 17:46:30,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 105 transitions, 528 flow [2024-06-21 17:46:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:46:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:46:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 17:46:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 17:46:30,967 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 173 transitions. [2024-06-21 17:46:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 105 transitions, 528 flow [2024-06-21 17:46:30,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 105 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 17:46:30,971 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 17:46:30,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 17:46:30,972 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 17:46:30,973 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 17:46:30,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:30,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:30,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:30,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:46:30,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:30,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1223757090, now seen corresponding path program 1 times [2024-06-21 17:46:30,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:30,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071411890] [2024-06-21 17:46:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:30,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:32,590 INFO 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 17:46:32,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071411890] [2024-06-21 17:46:32,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071411890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:32,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:32,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:46:32,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657973423] [2024-06-21 17:46:32,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:32,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:46:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:46:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:46:32,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 17:46:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:34,541 INFO L124 PetriNetUnfolderBase]: 6648/9210 cut-off events. [2024-06-21 17:46:34,541 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-21 17:46:34,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26380 conditions, 9210 events. 6648/9210 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47489 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-21 17:46:34,580 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-21 17:46:34,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 494 flow [2024-06-21 17:46:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:46:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:46:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:46:34,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:46:34,582 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:46:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 494 flow [2024-06-21 17:46:34,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 86 transitions, 450 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:46:34,587 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 286 flow [2024-06-21 17:46:34,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-06-21 17:46:34,587 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-21 17:46:34,588 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 286 flow [2024-06-21 17:46:34,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 17:46:34,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:34,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:46:34,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:34,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1901787101, now seen corresponding path program 1 times [2024-06-21 17:46:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737717917] [2024-06-21 17:46:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:37,106 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 17:46:37,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737717917] [2024-06-21 17:46:37,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737717917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:37,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124323483] [2024-06-21 17:46:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:37,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:37,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:46:37,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:37,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:37,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:39,242 INFO L124 PetriNetUnfolderBase]: 6675/9240 cut-off events. [2024-06-21 17:46:39,243 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-21 17:46:39,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 9240 events. 6675/9240 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47662 event pairs, 3168 based on Foata normal form. 3/9238 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-21 17:46:39,294 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-21 17:46:39,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 675 flow [2024-06-21 17:46:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:46:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:46:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 17:46:39,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:46:39,305 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 286 flow. Second operand 6 states and 150 transitions. [2024-06-21 17:46:39,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 675 flow [2024-06-21 17:46:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 17:46:39,314 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 409 flow [2024-06-21 17:46:39,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-21 17:46:39,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 17:46:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 409 flow [2024-06-21 17:46:39,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:46:39,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:39,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:46:39,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1249026463, now seen corresponding path program 2 times [2024-06-21 17:46:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116936384] [2024-06-21 17:46:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:41,626 INFO 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 17:46:41,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:41,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116936384] [2024-06-21 17:46:41,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116936384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:41,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:41,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:41,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521754713] [2024-06-21 17:46:41,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:41,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:41,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:41,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:41,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:46:41,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:41,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:41,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:43,698 INFO L124 PetriNetUnfolderBase]: 6666/9238 cut-off events. [2024-06-21 17:46:43,699 INFO L125 PetriNetUnfolderBase]: For 20628/20641 co-relation queries the response was YES. [2024-06-21 17:46:43,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31511 conditions, 9238 events. 6666/9238 cut-off events. For 20628/20641 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47626 event pairs, 3185 based on Foata normal form. 13/9246 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-21 17:46:43,742 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 17:46:43,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 694 flow [2024-06-21 17:46:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:46:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:46:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 17:46:43,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:46:43,744 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-21 17:46:43,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 694 flow [2024-06-21 17:46:43,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 17:46:43,765 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 423 flow [2024-06-21 17:46:43,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 17:46:43,766 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 17:46:43,766 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 423 flow [2024-06-21 17:46:43,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:46:43,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:43,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:46:43,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:43,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 790550909, now seen corresponding path program 1 times [2024-06-21 17:46:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:43,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079174773] [2024-06-21 17:46:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:45,780 INFO 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 17:46:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:45,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079174773] [2024-06-21 17:46:45,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079174773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:45,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:45,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:46:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482639843] [2024-06-21 17:46:45,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:45,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:46:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:46:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:46:45,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:45,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:46:45,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:45,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:45,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:47,674 INFO L124 PetriNetUnfolderBase]: 6651/9214 cut-off events. [2024-06-21 17:46:47,675 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-21 17:46:47,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 9214 events. 6651/9214 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47446 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-21 17:46:47,723 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 92 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-21 17:46:47,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 733 flow [2024-06-21 17:46:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:46:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:46:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 17:46:47,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:46:47,725 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 423 flow. Second operand 6 states and 141 transitions. [2024-06-21 17:46:47,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 733 flow [2024-06-21 17:46:47,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:46:47,745 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 454 flow [2024-06-21 17:46:47,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 17:46:47,745 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 17:46:47,746 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 454 flow [2024-06-21 17:46:47,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 17:46:47,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:47,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:47,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:46:47,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:47,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1440220937, now seen corresponding path program 1 times [2024-06-21 17:46:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:47,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242636228] [2024-06-21 17:46:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:46:50,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:50,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242636228] [2024-06-21 17:46:50,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242636228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:50,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:50,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:50,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151256490] [2024-06-21 17:46:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:50,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:50,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:50,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:50,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 454 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:50,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:50,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:50,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:52,706 INFO L124 PetriNetUnfolderBase]: 6697/9305 cut-off events. [2024-06-21 17:46:52,706 INFO L125 PetriNetUnfolderBase]: For 30768/30770 co-relation queries the response was YES. [2024-06-21 17:46:52,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33868 conditions, 9305 events. 6697/9305 cut-off events. For 30768/30770 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48605 event pairs, 2838 based on Foata normal form. 7/9309 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-21 17:46:52,750 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-21 17:46:52,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 870 flow [2024-06-21 17:46:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:46:52,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 17:46:52,753 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 454 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:46:52,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 870 flow [2024-06-21 17:46:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 832 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:46:52,772 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 526 flow [2024-06-21 17:46:52,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 17:46:52,772 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 17:46:52,772 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 526 flow [2024-06-21 17:46:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:52,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:46:52,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:52,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1440100967, now seen corresponding path program 2 times [2024-06-21 17:46:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261215602] [2024-06-21 17:46:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:46:55,591 INFO 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 17:46:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:46:55,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261215602] [2024-06-21 17:46:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261215602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:46:55,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:46:55,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:46:55,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527283855] [2024-06-21 17:46:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:46:55,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:46:55,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:46:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:46:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:46:55,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:46:55,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:55,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:46:55,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:46:55,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:46:57,738 INFO L124 PetriNetUnfolderBase]: 6724/9332 cut-off events. [2024-06-21 17:46:57,738 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-21 17:46:57,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36900 conditions, 9332 events. 6724/9332 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48207 event pairs, 2984 based on Foata normal form. 3/9330 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-21 17:46:57,796 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-21 17:46:57,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 145 transitions, 1096 flow [2024-06-21 17:46:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:46:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:46:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:46:57,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:46:57,798 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 526 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:46:57,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 145 transitions, 1096 flow [2024-06-21 17:46:57,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 145 transitions, 998 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:46:57,827 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 682 flow [2024-06-21 17:46:57,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-21 17:46:57,827 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-21 17:46:57,827 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 682 flow [2024-06-21 17:46:57,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:46:57,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:46:57,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:46:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:46:57,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:46:57,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:46:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash 65116855, now seen corresponding path program 3 times [2024-06-21 17:46:57,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:46:57,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905568469] [2024-06-21 17:46:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:46:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:46:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:00,446 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 17:47:00,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:00,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905568469] [2024-06-21 17:47:00,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905568469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:00,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:00,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:00,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991386320] [2024-06-21 17:47:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:00,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:00,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:00,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:00,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 682 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:00,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:00,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:02,733 INFO L124 PetriNetUnfolderBase]: 6715/9323 cut-off events. [2024-06-21 17:47:02,733 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-21 17:47:02,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39395 conditions, 9323 events. 6715/9323 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48124 event pairs, 3001 based on Foata normal form. 3/9318 useless extension candidates. Maximal degree in co-relation 39364. Up to 9050 conditions per place. [2024-06-21 17:47:02,790 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-21 17:47:02,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 1057 flow [2024-06-21 17:47:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:47:02,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:47:02,793 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 682 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:47:02,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 1057 flow [2024-06-21 17:47:02,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 17:47:02,829 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 710 flow [2024-06-21 17:47:02,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-21 17:47:02,830 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-21 17:47:02,832 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 710 flow [2024-06-21 17:47:02,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:02,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:02,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:02,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:47:02,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:02,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1467563330, now seen corresponding path program 1 times [2024-06-21 17:47:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:02,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77470764] [2024-06-21 17:47:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:02,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77470764] [2024-06-21 17:47:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77470764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:05,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:05,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:05,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26603846] [2024-06-21 17:47:05,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:05,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:05,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:05,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:05,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:05,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:05,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:05,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:05,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:07,659 INFO L124 PetriNetUnfolderBase]: 7004/9734 cut-off events. [2024-06-21 17:47:07,659 INFO L125 PetriNetUnfolderBase]: For 58857/58857 co-relation queries the response was YES. [2024-06-21 17:47:07,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42107 conditions, 9734 events. 7004/9734 cut-off events. For 58857/58857 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50316 event pairs, 2996 based on Foata normal form. 18/9747 useless extension candidates. Maximal degree in co-relation 42074. Up to 9352 conditions per place. [2024-06-21 17:47:07,719 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 136 selfloop transitions, 50 changer transitions 0/192 dead transitions. [2024-06-21 17:47:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 192 transitions, 1538 flow [2024-06-21 17:47:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:47:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:47:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-21 17:47:07,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:47:07,722 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 710 flow. Second operand 10 states and 235 transitions. [2024-06-21 17:47:07,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 192 transitions, 1538 flow [2024-06-21 17:47:07,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 192 transitions, 1452 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:47:07,777 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1064 flow [2024-06-21 17:47:07,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1064, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2024-06-21 17:47:07,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-21 17:47:07,778 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1064 flow [2024-06-21 17:47:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:07,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:07,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:07,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:47:07,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:07,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2038739330, now seen corresponding path program 2 times [2024-06-21 17:47:07,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:07,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566806618] [2024-06-21 17:47:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:10,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:10,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566806618] [2024-06-21 17:47:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566806618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:10,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170559797] [2024-06-21 17:47:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:10,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:10,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:10,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1064 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:10,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:10,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:10,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:13,142 INFO L124 PetriNetUnfolderBase]: 7048/9798 cut-off events. [2024-06-21 17:47:13,143 INFO L125 PetriNetUnfolderBase]: For 80810/80810 co-relation queries the response was YES. [2024-06-21 17:47:13,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47497 conditions, 9798 events. 7048/9798 cut-off events. For 80810/80810 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50774 event pairs, 2954 based on Foata normal form. 6/9799 useless extension candidates. Maximal degree in co-relation 47458. Up to 9465 conditions per place. [2024-06-21 17:47:13,203 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 132 selfloop transitions, 42 changer transitions 0/180 dead transitions. [2024-06-21 17:47:13,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1610 flow [2024-06-21 17:47:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 17:47:13,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 17:47:13,206 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1064 flow. Second operand 7 states and 170 transitions. [2024-06-21 17:47:13,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1610 flow [2024-06-21 17:47:13,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 180 transitions, 1564 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 17:47:13,270 INFO L231 Difference]: Finished difference. Result has 103 places, 134 transitions, 1186 flow [2024-06-21 17:47:13,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1186, PETRI_PLACES=103, PETRI_TRANSITIONS=134} [2024-06-21 17:47:13,272 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-21 17:47:13,272 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 134 transitions, 1186 flow [2024-06-21 17:47:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:13,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:13,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:13,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:47:13,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:13,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2018630654, now seen corresponding path program 3 times [2024-06-21 17:47:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145812576] [2024-06-21 17:47:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:47:15,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145812576] [2024-06-21 17:47:15,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145812576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:15,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129767172] [2024-06-21 17:47:15,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:15,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:15,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:15,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 134 transitions, 1186 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:15,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:15,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:15,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:18,105 INFO L124 PetriNetUnfolderBase]: 7092/9872 cut-off events. [2024-06-21 17:47:18,106 INFO L125 PetriNetUnfolderBase]: For 93943/93956 co-relation queries the response was YES. [2024-06-21 17:47:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49932 conditions, 9872 events. 7092/9872 cut-off events. For 93943/93956 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51221 event pairs, 2974 based on Foata normal form. 16/9881 useless extension candidates. Maximal degree in co-relation 49891. Up to 9567 conditions per place. [2024-06-21 17:47:18,184 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 40 changer transitions 0/181 dead transitions. [2024-06-21 17:47:18,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 181 transitions, 1718 flow [2024-06-21 17:47:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 17:47:18,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-21 17:47:18,186 INFO L175 Difference]: Start difference. First operand has 103 places, 134 transitions, 1186 flow. Second operand 7 states and 166 transitions. [2024-06-21 17:47:18,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 181 transitions, 1718 flow [2024-06-21 17:47:18,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 181 transitions, 1604 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:18,476 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 1213 flow [2024-06-21 17:47:18,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-06-21 17:47:18,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 17:47:18,477 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 1213 flow [2024-06-21 17:47:18,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:18,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:18,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:47:18,477 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:18,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash -489720484, now seen corresponding path program 4 times [2024-06-21 17:47:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409477090] [2024-06-21 17:47:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:20,863 INFO 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 17:47:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409477090] [2024-06-21 17:47:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409477090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:20,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:20,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:47:20,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14147507] [2024-06-21 17:47:20,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:20,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:47:20,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:47:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:47:20,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:20,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:20,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:20,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:23,149 INFO L124 PetriNetUnfolderBase]: 7077/9851 cut-off events. [2024-06-21 17:47:23,149 INFO L125 PetriNetUnfolderBase]: For 106498/106511 co-relation queries the response was YES. [2024-06-21 17:47:23,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51354 conditions, 9851 events. 7077/9851 cut-off events. For 106498/106511 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51061 event pairs, 2729 based on Foata normal form. 16/9860 useless extension candidates. Maximal degree in co-relation 51312. Up to 9376 conditions per place. [2024-06-21 17:47:23,227 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 128 selfloop transitions, 50 changer transitions 0/184 dead transitions. [2024-06-21 17:47:23,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 1751 flow [2024-06-21 17:47:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:47:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:47:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 17:47:23,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 17:47:23,229 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 1213 flow. Second operand 7 states and 167 transitions. [2024-06-21 17:47:23,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 1751 flow [2024-06-21 17:47:23,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 184 transitions, 1636 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:23,343 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1264 flow [2024-06-21 17:47:23,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2024-06-21 17:47:23,344 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 17:47:23,344 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1264 flow [2024-06-21 17:47:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:23,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:23,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:23,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:47:23,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:23,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1483308204, now seen corresponding path program 1 times [2024-06-21 17:47:23,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:23,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219370231] [2024-06-21 17:47:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:23,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:26,846 INFO 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 17:47:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219370231] [2024-06-21 17:47:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219370231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:26,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:26,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:26,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054753637] [2024-06-21 17:47:26,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:26,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:26,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:26,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:26,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:26,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:26,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:29,469 INFO L124 PetriNetUnfolderBase]: 7675/10735 cut-off events. [2024-06-21 17:47:29,470 INFO L125 PetriNetUnfolderBase]: For 136160/136162 co-relation queries the response was YES. [2024-06-21 17:47:29,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58144 conditions, 10735 events. 7675/10735 cut-off events. For 136160/136162 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 57086 event pairs, 2379 based on Foata normal form. 32/10764 useless extension candidates. Maximal degree in co-relation 58101. Up to 9738 conditions per place. [2024-06-21 17:47:29,673 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 177 selfloop transitions, 43 changer transitions 0/226 dead transitions. [2024-06-21 17:47:29,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 226 transitions, 2156 flow [2024-06-21 17:47:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:47:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:47:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 17:47:29,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 17:47:29,676 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1264 flow. Second operand 9 states and 231 transitions. [2024-06-21 17:47:29,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 226 transitions, 2156 flow [2024-06-21 17:47:29,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 226 transitions, 2016 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:29,794 INFO L231 Difference]: Finished difference. Result has 112 places, 149 transitions, 1360 flow [2024-06-21 17:47:29,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1360, PETRI_PLACES=112, PETRI_TRANSITIONS=149} [2024-06-21 17:47:29,795 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-21 17:47:29,795 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 149 transitions, 1360 flow [2024-06-21 17:47:29,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:29,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:29,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:47:29,796 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:29,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1072780810, now seen corresponding path program 2 times [2024-06-21 17:47:29,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:29,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490074044] [2024-06-21 17:47:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:33,288 INFO 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 17:47:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:33,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490074044] [2024-06-21 17:47:33,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490074044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:33,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:33,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:33,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345776565] [2024-06-21 17:47:33,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:33,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:33,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:33,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:33,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 149 transitions, 1360 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:33,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:33,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:33,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:35,921 INFO L124 PetriNetUnfolderBase]: 7577/10597 cut-off events. [2024-06-21 17:47:35,921 INFO L125 PetriNetUnfolderBase]: For 148419/148421 co-relation queries the response was YES. [2024-06-21 17:47:35,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58707 conditions, 10597 events. 7577/10597 cut-off events. For 148419/148421 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 56215 event pairs, 2859 based on Foata normal form. 42/10636 useless extension candidates. Maximal degree in co-relation 58662. Up to 9994 conditions per place. [2024-06-21 17:47:35,997 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-21 17:47:35,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 212 transitions, 1993 flow [2024-06-21 17:47:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 17:47:35,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 17:47:35,999 INFO L175 Difference]: Start difference. First operand has 112 places, 149 transitions, 1360 flow. Second operand 8 states and 202 transitions. [2024-06-21 17:47:35,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 212 transitions, 1993 flow [2024-06-21 17:47:36,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 212 transitions, 1889 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:36,170 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1366 flow [2024-06-21 17:47:36,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-21 17:47:36,171 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-21 17:47:36,171 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1366 flow [2024-06-21 17:47:36,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:36,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:36,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:36,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:47:36,172 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:36,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -957489640, now seen corresponding path program 3 times [2024-06-21 17:47:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492783330] [2024-06-21 17:47:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:39,672 INFO 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 17:47:39,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492783330] [2024-06-21 17:47:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492783330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:39,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:39,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112205172] [2024-06-21 17:47:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:39,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:39,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1366 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:39,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:39,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:39,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:42,381 INFO L124 PetriNetUnfolderBase]: 7733/10845 cut-off events. [2024-06-21 17:47:42,381 INFO L125 PetriNetUnfolderBase]: For 157440/157440 co-relation queries the response was YES. [2024-06-21 17:47:42,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60189 conditions, 10845 events. 7733/10845 cut-off events. For 157440/157440 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 58272 event pairs, 2900 based on Foata normal form. 24/10864 useless extension candidates. Maximal degree in co-relation 60142. Up to 10250 conditions per place. [2024-06-21 17:47:42,460 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 154 selfloop transitions, 51 changer transitions 0/211 dead transitions. [2024-06-21 17:47:42,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 211 transitions, 2014 flow [2024-06-21 17:47:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:47:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 17:47:42,469 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1366 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:47:42,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 211 transitions, 2014 flow [2024-06-21 17:47:42,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 211 transitions, 1943 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:47:42,620 INFO L231 Difference]: Finished difference. Result has 117 places, 152 transitions, 1457 flow [2024-06-21 17:47:42,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1457, PETRI_PLACES=117, PETRI_TRANSITIONS=152} [2024-06-21 17:47:42,626 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-21 17:47:42,626 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 152 transitions, 1457 flow [2024-06-21 17:47:42,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:42,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:42,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:42,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:47:42,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:42,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1223588044, now seen corresponding path program 1 times [2024-06-21 17:47:42,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:42,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118997752] [2024-06-21 17:47:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:42,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:45,772 INFO 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 17:47:45,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:45,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118997752] [2024-06-21 17:47:45,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118997752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:45,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:45,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895896663] [2024-06-21 17:47:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:45,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:45,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 152 transitions, 1457 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:45,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:48,528 INFO L124 PetriNetUnfolderBase]: 7845/11037 cut-off events. [2024-06-21 17:47:48,528 INFO L125 PetriNetUnfolderBase]: For 176090/176090 co-relation queries the response was YES. [2024-06-21 17:47:48,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62535 conditions, 11037 events. 7845/11037 cut-off events. For 176090/176090 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 59755 event pairs, 2882 based on Foata normal form. 18/11050 useless extension candidates. Maximal degree in co-relation 62487. Up to 9982 conditions per place. [2024-06-21 17:47:48,606 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 154 selfloop transitions, 57 changer transitions 0/217 dead transitions. [2024-06-21 17:47:48,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 217 transitions, 2150 flow [2024-06-21 17:47:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 17:47:48,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 17:47:48,608 INFO L175 Difference]: Start difference. First operand has 117 places, 152 transitions, 1457 flow. Second operand 8 states and 199 transitions. [2024-06-21 17:47:48,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 217 transitions, 2150 flow [2024-06-21 17:47:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 217 transitions, 2026 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:47:48,777 INFO L231 Difference]: Finished difference. Result has 120 places, 155 transitions, 1546 flow [2024-06-21 17:47:48,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1546, PETRI_PLACES=120, PETRI_TRANSITIONS=155} [2024-06-21 17:47:48,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 17:47:48,778 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 155 transitions, 1546 flow [2024-06-21 17:47:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:48,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:48,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:48,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:47:48,779 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:48,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1847141450, now seen corresponding path program 4 times [2024-06-21 17:47:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930072023] [2024-06-21 17:47:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:48,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:51,915 INFO 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 17:47:51,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:51,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930072023] [2024-06-21 17:47:51,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930072023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:51,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:51,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380149316] [2024-06-21 17:47:51,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:51,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:51,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 155 transitions, 1546 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:51,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:51,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:51,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:47:54,694 INFO L124 PetriNetUnfolderBase]: 7942/11189 cut-off events. [2024-06-21 17:47:54,694 INFO L125 PetriNetUnfolderBase]: For 195160/195160 co-relation queries the response was YES. [2024-06-21 17:47:54,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64633 conditions, 11189 events. 7942/11189 cut-off events. For 195160/195160 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 60671 event pairs, 2960 based on Foata normal form. 24/11203 useless extension candidates. Maximal degree in co-relation 64583. Up to 10573 conditions per place. [2024-06-21 17:47:54,789 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 157 selfloop transitions, 50 changer transitions 0/213 dead transitions. [2024-06-21 17:47:54,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 2202 flow [2024-06-21 17:47:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:47:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:47:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 17:47:54,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 17:47:54,791 INFO L175 Difference]: Start difference. First operand has 120 places, 155 transitions, 1546 flow. Second operand 8 states and 193 transitions. [2024-06-21 17:47:54,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 2202 flow [2024-06-21 17:47:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 213 transitions, 2072 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:47:55,114 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1584 flow [2024-06-21 17:47:55,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1584, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-21 17:47:55,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-21 17:47:55,115 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1584 flow [2024-06-21 17:47:55,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:55,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:47:55,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:47:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:47:55,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:47:55,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:47:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1762360986, now seen corresponding path program 2 times [2024-06-21 17:47:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:47:55,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684289009] [2024-06-21 17:47:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:47:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:47:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:47:58,322 INFO 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 17:47:58,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:47:58,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684289009] [2024-06-21 17:47:58,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684289009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:47:58,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:47:58,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:47:58,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205534721] [2024-06-21 17:47:58,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:47:58,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:47:58,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:47:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:47:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:47:58,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:47:58,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1584 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:47:58,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:47:58,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:47:58,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:00,910 INFO L124 PetriNetUnfolderBase]: 8054/11381 cut-off events. [2024-06-21 17:48:00,911 INFO L125 PetriNetUnfolderBase]: For 213381/213381 co-relation queries the response was YES. [2024-06-21 17:48:00,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66583 conditions, 11381 events. 8054/11381 cut-off events. For 213381/213381 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 62126 event pairs, 2960 based on Foata normal form. 18/11389 useless extension candidates. Maximal degree in co-relation 66532. Up to 10555 conditions per place. [2024-06-21 17:48:01,006 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-21 17:48:01,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 219 transitions, 2272 flow [2024-06-21 17:48:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 17:48:01,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:48:01,008 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1584 flow. Second operand 8 states and 196 transitions. [2024-06-21 17:48:01,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 219 transitions, 2272 flow [2024-06-21 17:48:01,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 219 transitions, 2142 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:01,239 INFO L231 Difference]: Finished difference. Result has 125 places, 159 transitions, 1631 flow [2024-06-21 17:48:01,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1631, PETRI_PLACES=125, PETRI_TRANSITIONS=159} [2024-06-21 17:48:01,240 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-21 17:48:01,240 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 159 transitions, 1631 flow [2024-06-21 17:48:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:01,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:01,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:01,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:48:01,240 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:01,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1998536346, now seen corresponding path program 3 times [2024-06-21 17:48:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:01,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586428008] [2024-06-21 17:48:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:01,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:03,986 INFO 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 17:48:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586428008] [2024-06-21 17:48:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586428008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:03,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:03,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:03,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633814193] [2024-06-21 17:48:03,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:03,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:03,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:04,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:04,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 159 transitions, 1631 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:04,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:04,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:04,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:06,833 INFO L124 PetriNetUnfolderBase]: 8015/11324 cut-off events. [2024-06-21 17:48:06,834 INFO L125 PetriNetUnfolderBase]: For 225066/225066 co-relation queries the response was YES. [2024-06-21 17:48:06,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66723 conditions, 11324 events. 8015/11324 cut-off events. For 225066/225066 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61682 event pairs, 2585 based on Foata normal form. 18/11332 useless extension candidates. Maximal degree in co-relation 66671. Up to 9636 conditions per place. [2024-06-21 17:48:06,930 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 145 selfloop transitions, 68 changer transitions 0/219 dead transitions. [2024-06-21 17:48:06,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 219 transitions, 2271 flow [2024-06-21 17:48:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 17:48:06,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 17:48:06,932 INFO L175 Difference]: Start difference. First operand has 125 places, 159 transitions, 1631 flow. Second operand 8 states and 195 transitions. [2024-06-21 17:48:06,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 219 transitions, 2271 flow [2024-06-21 17:48:07,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 219 transitions, 2124 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:07,154 INFO L231 Difference]: Finished difference. Result has 126 places, 160 transitions, 1651 flow [2024-06-21 17:48:07,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1651, PETRI_PLACES=126, PETRI_TRANSITIONS=160} [2024-06-21 17:48:07,154 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 17:48:07,154 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 160 transitions, 1651 flow [2024-06-21 17:48:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:07,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:07,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:48:07,155 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:07,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash -37978970, now seen corresponding path program 1 times [2024-06-21 17:48:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:07,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456370161] [2024-06-21 17:48:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:08,868 INFO 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 17:48:08,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:08,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456370161] [2024-06-21 17:48:08,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456370161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:08,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:08,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:08,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013744478] [2024-06-21 17:48:08,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:08,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:08,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:48:08,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 160 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:08,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:08,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:48:08,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:11,012 INFO L124 PetriNetUnfolderBase]: 7563/10826 cut-off events. [2024-06-21 17:48:11,012 INFO L125 PetriNetUnfolderBase]: For 228530/228532 co-relation queries the response was YES. [2024-06-21 17:48:11,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64285 conditions, 10826 events. 7563/10826 cut-off events. For 228530/228532 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 60536 event pairs, 2952 based on Foata normal form. 10/10778 useless extension candidates. Maximal degree in co-relation 64232. Up to 10307 conditions per place. [2024-06-21 17:48:11,125 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 155 selfloop transitions, 17 changer transitions 0/194 dead transitions. [2024-06-21 17:48:11,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 194 transitions, 2231 flow [2024-06-21 17:48:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:48:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:48:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 17:48:11,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:48:11,127 INFO L175 Difference]: Start difference. First operand has 126 places, 160 transitions, 1651 flow. Second operand 5 states and 125 transitions. [2024-06-21 17:48:11,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 194 transitions, 2231 flow [2024-06-21 17:48:11,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 194 transitions, 2050 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:11,390 INFO L231 Difference]: Finished difference. Result has 126 places, 170 transitions, 1639 flow [2024-06-21 17:48:11,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1639, PETRI_PLACES=126, PETRI_TRANSITIONS=170} [2024-06-21 17:48:11,391 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 17:48:11,391 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 170 transitions, 1639 flow [2024-06-21 17:48:11,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:11,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:11,392 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 17:48:11,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:48:11,392 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:11,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1182114796, now seen corresponding path program 1 times [2024-06-21 17:48:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:11,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038472724] [2024-06-21 17:48:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:13,166 INFO 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 17:48:13,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:13,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038472724] [2024-06-21 17:48:13,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038472724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:13,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:13,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:13,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529902515] [2024-06-21 17:48:13,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:13,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:13,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:13,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:13,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:13,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 170 transitions, 1639 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:13,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:13,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:13,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:15,847 INFO L124 PetriNetUnfolderBase]: 8060/11395 cut-off events. [2024-06-21 17:48:15,847 INFO L125 PetriNetUnfolderBase]: For 253088/253092 co-relation queries the response was YES. [2024-06-21 17:48:15,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70029 conditions, 11395 events. 8060/11395 cut-off events. For 253088/253092 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62180 event pairs, 2961 based on Foata normal form. 6/11397 useless extension candidates. Maximal degree in co-relation 69974. Up to 11135 conditions per place. [2024-06-21 17:48:15,950 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 180 selfloop transitions, 21 changer transitions 0/207 dead transitions. [2024-06-21 17:48:15,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 207 transitions, 2365 flow [2024-06-21 17:48:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 17:48:15,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 17:48:15,952 INFO L175 Difference]: Start difference. First operand has 126 places, 170 transitions, 1639 flow. Second operand 6 states and 139 transitions. [2024-06-21 17:48:15,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 207 transitions, 2365 flow [2024-06-21 17:48:16,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 207 transitions, 2307 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:16,224 INFO L231 Difference]: Finished difference. Result has 131 places, 178 transitions, 1792 flow [2024-06-21 17:48:16,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1792, PETRI_PLACES=131, PETRI_TRANSITIONS=178} [2024-06-21 17:48:16,224 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-21 17:48:16,225 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 178 transitions, 1792 flow [2024-06-21 17:48:16,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:16,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:16,225 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 17:48:16,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:48:16,226 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:16,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -489527056, now seen corresponding path program 2 times [2024-06-21 17:48:16,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:16,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000486626] [2024-06-21 17:48:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:18,112 INFO 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 17:48:18,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:18,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000486626] [2024-06-21 17:48:18,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000486626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:18,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:18,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:18,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494614727] [2024-06-21 17:48:18,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:18,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:18,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:18,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:18,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 1792 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:18,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:18,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:20,401 INFO L124 PetriNetUnfolderBase]: 8053/11386 cut-off events. [2024-06-21 17:48:20,401 INFO L125 PetriNetUnfolderBase]: For 276814/276818 co-relation queries the response was YES. [2024-06-21 17:48:20,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72113 conditions, 11386 events. 8053/11386 cut-off events. For 276814/276818 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 62150 event pairs, 2961 based on Foata normal form. 6/11388 useless extension candidates. Maximal degree in co-relation 72055. Up to 11139 conditions per place. [2024-06-21 17:48:20,499 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 177 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2024-06-21 17:48:20,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 2244 flow [2024-06-21 17:48:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:48:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:48:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:48:20,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:48:20,501 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 1792 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:48:20,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 2244 flow [2024-06-21 17:48:20,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 200 transitions, 2112 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-21 17:48:20,870 INFO L231 Difference]: Finished difference. Result has 134 places, 178 transitions, 1708 flow [2024-06-21 17:48:20,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1708, PETRI_PLACES=134, PETRI_TRANSITIONS=178} [2024-06-21 17:48:20,871 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 17:48:20,871 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 178 transitions, 1708 flow [2024-06-21 17:48:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:20,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:20,872 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 17:48:20,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:48:20,872 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:20,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1831832743, now seen corresponding path program 1 times [2024-06-21 17:48:20,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:20,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165615570] [2024-06-21 17:48:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:23,672 INFO 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 17:48:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165615570] [2024-06-21 17:48:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165615570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:23,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:23,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:23,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980070257] [2024-06-21 17:48:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:23,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:48:23,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 178 transitions, 1708 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:23,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:48:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:26,505 INFO L124 PetriNetUnfolderBase]: 8101/11570 cut-off events. [2024-06-21 17:48:26,505 INFO L125 PetriNetUnfolderBase]: For 304749/304777 co-relation queries the response was YES. [2024-06-21 17:48:26,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73798 conditions, 11570 events. 8101/11570 cut-off events. For 304749/304777 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64690 event pairs, 2917 based on Foata normal form. 20/11525 useless extension candidates. Maximal degree in co-relation 73738. Up to 10639 conditions per place. [2024-06-21 17:48:26,617 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 184 selfloop transitions, 51 changer transitions 0/257 dead transitions. [2024-06-21 17:48:26,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 257 transitions, 2780 flow [2024-06-21 17:48:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:48:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:48:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 17:48:26,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:48:26,619 INFO L175 Difference]: Start difference. First operand has 134 places, 178 transitions, 1708 flow. Second operand 9 states and 216 transitions. [2024-06-21 17:48:26,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 257 transitions, 2780 flow [2024-06-21 17:48:26,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 257 transitions, 2746 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:48:26,914 INFO L231 Difference]: Finished difference. Result has 141 places, 202 transitions, 2079 flow [2024-06-21 17:48:26,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2079, PETRI_PLACES=141, PETRI_TRANSITIONS=202} [2024-06-21 17:48:26,915 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-21 17:48:26,915 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 202 transitions, 2079 flow [2024-06-21 17:48:26,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:26,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:26,916 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 17:48:26,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:48:26,916 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:26,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1987366853, now seen corresponding path program 2 times [2024-06-21 17:48:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:26,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308001940] [2024-06-21 17:48:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:29,449 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 17:48:29,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308001940] [2024-06-21 17:48:29,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308001940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:29,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:29,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:29,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169959339] [2024-06-21 17:48:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:29,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:29,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:48:29,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 202 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:29,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:29,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:48:29,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:31,948 INFO L124 PetriNetUnfolderBase]: 8143/11628 cut-off events. [2024-06-21 17:48:31,948 INFO L125 PetriNetUnfolderBase]: For 334680/334708 co-relation queries the response was YES. [2024-06-21 17:48:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78135 conditions, 11628 events. 8143/11628 cut-off events. For 334680/334708 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65055 event pairs, 2897 based on Foata normal form. 20/11583 useless extension candidates. Maximal degree in co-relation 78072. Up to 10683 conditions per place. [2024-06-21 17:48:32,067 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 173 selfloop transitions, 52 changer transitions 0/247 dead transitions. [2024-06-21 17:48:32,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 247 transitions, 2799 flow [2024-06-21 17:48:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 17:48:32,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 17:48:32,069 INFO L175 Difference]: Start difference. First operand has 141 places, 202 transitions, 2079 flow. Second operand 7 states and 170 transitions. [2024-06-21 17:48:32,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 247 transitions, 2799 flow [2024-06-21 17:48:32,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 247 transitions, 2699 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-21 17:48:32,531 INFO L231 Difference]: Finished difference. Result has 147 places, 208 transitions, 2232 flow [2024-06-21 17:48:32,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2232, PETRI_PLACES=147, PETRI_TRANSITIONS=208} [2024-06-21 17:48:32,531 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-21 17:48:32,531 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 208 transitions, 2232 flow [2024-06-21 17:48:32,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:32,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:32,532 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 17:48:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:48:32,532 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:32,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash 841107063, now seen corresponding path program 3 times [2024-06-21 17:48:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:32,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276503583] [2024-06-21 17:48:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:32,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:35,162 INFO 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 17:48:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276503583] [2024-06-21 17:48:35,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276503583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:35,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:35,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:35,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681126349] [2024-06-21 17:48:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:35,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:35,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:35,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:35,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:48:35,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 208 transitions, 2232 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:35,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:35,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:48:35,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:37,882 INFO L124 PetriNetUnfolderBase]: 8227/11752 cut-off events. [2024-06-21 17:48:37,883 INFO L125 PetriNetUnfolderBase]: For 353859/353930 co-relation queries the response was YES. [2024-06-21 17:48:37,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80241 conditions, 11752 events. 8227/11752 cut-off events. For 353859/353930 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 65861 event pairs, 2926 based on Foata normal form. 31/11704 useless extension candidates. Maximal degree in co-relation 80175. Up to 10497 conditions per place. [2024-06-21 17:48:37,998 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 170 selfloop transitions, 64 changer transitions 0/256 dead transitions. [2024-06-21 17:48:37,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 256 transitions, 3118 flow [2024-06-21 17:48:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 17:48:38,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-21 17:48:38,000 INFO L175 Difference]: Start difference. First operand has 147 places, 208 transitions, 2232 flow. Second operand 6 states and 151 transitions. [2024-06-21 17:48:38,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 256 transitions, 3118 flow [2024-06-21 17:48:38,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 256 transitions, 2983 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:48:38,471 INFO L231 Difference]: Finished difference. Result has 150 places, 222 transitions, 2478 flow [2024-06-21 17:48:38,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2478, PETRI_PLACES=150, PETRI_TRANSITIONS=222} [2024-06-21 17:48:38,472 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-21 17:48:38,472 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 222 transitions, 2478 flow [2024-06-21 17:48:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:38,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:38,472 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 17:48:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:48:38,473 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:38,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2009148775, now seen corresponding path program 1 times [2024-06-21 17:48:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53368186] [2024-06-21 17:48:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:40,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:40,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53368186] [2024-06-21 17:48:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53368186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:40,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:40,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117850612] [2024-06-21 17:48:40,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:40,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:40,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:40,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:40,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:40,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 222 transitions, 2478 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:40,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:40,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:40,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:43,972 INFO L124 PetriNetUnfolderBase]: 8995/12645 cut-off events. [2024-06-21 17:48:43,972 INFO L125 PetriNetUnfolderBase]: For 366475/366475 co-relation queries the response was YES. [2024-06-21 17:48:44,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88269 conditions, 12645 events. 8995/12645 cut-off events. For 366475/366475 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 68715 event pairs, 3010 based on Foata normal form. 8/12648 useless extension candidates. Maximal degree in co-relation 88201. Up to 12043 conditions per place. [2024-06-21 17:48:44,085 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 241 selfloop transitions, 37 changer transitions 0/284 dead transitions. [2024-06-21 17:48:44,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 284 transitions, 3700 flow [2024-06-21 17:48:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:48:44,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:48:44,087 INFO L175 Difference]: Start difference. First operand has 150 places, 222 transitions, 2478 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:48:44,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 284 transitions, 3700 flow [2024-06-21 17:48:44,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 284 transitions, 3592 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:44,578 INFO L231 Difference]: Finished difference. Result has 158 places, 237 transitions, 2738 flow [2024-06-21 17:48:44,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2738, PETRI_PLACES=158, PETRI_TRANSITIONS=237} [2024-06-21 17:48:44,579 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-06-21 17:48:44,579 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 237 transitions, 2738 flow [2024-06-21 17:48:44,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:44,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:44,579 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 17:48:44,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:48:44,579 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:44,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1987551365, now seen corresponding path program 2 times [2024-06-21 17:48:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:44,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285261441] [2024-06-21 17:48:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:46,922 INFO 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 17:48:46,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285261441] [2024-06-21 17:48:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285261441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:46,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:46,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363048946] [2024-06-21 17:48:46,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:46,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:46,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:46,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 237 transitions, 2738 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:46,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:46,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:46,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:49,666 INFO L124 PetriNetUnfolderBase]: 9073/12759 cut-off events. [2024-06-21 17:48:49,666 INFO L125 PetriNetUnfolderBase]: For 390784/390784 co-relation queries the response was YES. [2024-06-21 17:48:49,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89955 conditions, 12759 events. 9073/12759 cut-off events. For 390784/390784 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 69319 event pairs, 3019 based on Foata normal form. 8/12762 useless extension candidates. Maximal degree in co-relation 89882. Up to 12203 conditions per place. [2024-06-21 17:48:49,810 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 31 changer transitions 0/281 dead transitions. [2024-06-21 17:48:49,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 281 transitions, 3750 flow [2024-06-21 17:48:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 17:48:49,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-21 17:48:49,813 INFO L175 Difference]: Start difference. First operand has 158 places, 237 transitions, 2738 flow. Second operand 6 states and 151 transitions. [2024-06-21 17:48:49,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 281 transitions, 3750 flow [2024-06-21 17:48:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 281 transitions, 3605 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-21 17:48:50,417 INFO L231 Difference]: Finished difference. Result has 163 places, 243 transitions, 2807 flow [2024-06-21 17:48:50,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2807, PETRI_PLACES=163, PETRI_TRANSITIONS=243} [2024-06-21 17:48:50,418 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-21 17:48:50,418 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 243 transitions, 2807 flow [2024-06-21 17:48:50,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:50,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:50,418 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 17:48:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:48:50,419 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:50,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1987758755, now seen corresponding path program 3 times [2024-06-21 17:48:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472539582] [2024-06-21 17:48:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:52,618 INFO 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 17:48:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472539582] [2024-06-21 17:48:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472539582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:52,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:52,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432019889] [2024-06-21 17:48:52,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:52,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:52,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:52,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:48:52,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 243 transitions, 2807 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:52,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:52,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:48:52,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:55,800 INFO L124 PetriNetUnfolderBase]: 9099/12804 cut-off events. [2024-06-21 17:48:55,800 INFO L125 PetriNetUnfolderBase]: For 412334/412338 co-relation queries the response was YES. [2024-06-21 17:48:55,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91210 conditions, 12804 events. 9099/12804 cut-off events. For 412334/412338 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 69718 event pairs, 2991 based on Foata normal form. 12/12812 useless extension candidates. Maximal degree in co-relation 91134. Up to 12229 conditions per place. [2024-06-21 17:48:55,921 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 253 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-21 17:48:55,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 298 transitions, 3773 flow [2024-06-21 17:48:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 17:48:55,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-21 17:48:55,923 INFO L175 Difference]: Start difference. First operand has 163 places, 243 transitions, 2807 flow. Second operand 8 states and 194 transitions. [2024-06-21 17:48:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 298 transitions, 3773 flow [2024-06-21 17:48:56,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 298 transitions, 3639 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 17:48:56,415 INFO L231 Difference]: Finished difference. Result has 167 places, 248 transitions, 2865 flow [2024-06-21 17:48:56,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=167, PETRI_TRANSITIONS=248} [2024-06-21 17:48:56,415 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-21 17:48:56,416 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 248 transitions, 2865 flow [2024-06-21 17:48:56,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:56,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:56,416 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 17:48:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:48:56,416 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:48:56,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1987766691, now seen corresponding path program 1 times [2024-06-21 17:48:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:56,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397892968] [2024-06-21 17:48:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:59,580 INFO 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 17:48:59,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:59,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397892968] [2024-06-21 17:48:59,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397892968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:59,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:59,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:59,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452940433] [2024-06-21 17:48:59,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:59,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:59,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:48:59,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 248 transitions, 2865 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:59,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:59,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:48:59,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:02,541 INFO L124 PetriNetUnfolderBase]: 8508/12177 cut-off events. [2024-06-21 17:49:02,542 INFO L125 PetriNetUnfolderBase]: For 427737/427817 co-relation queries the response was YES. [2024-06-21 17:49:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87692 conditions, 12177 events. 8508/12177 cut-off events. For 427737/427817 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 68520 event pairs, 2944 based on Foata normal form. 20/12135 useless extension candidates. Maximal degree in co-relation 87615. Up to 11444 conditions per place. [2024-06-21 17:49:02,653 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 244 selfloop transitions, 20 changer transitions 0/286 dead transitions. [2024-06-21 17:49:02,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 286 transitions, 3669 flow [2024-06-21 17:49:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 17:49:02,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:49:02,660 INFO L175 Difference]: Start difference. First operand has 167 places, 248 transitions, 2865 flow. Second operand 6 states and 150 transitions. [2024-06-21 17:49:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 286 transitions, 3669 flow [2024-06-21 17:49:03,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 286 transitions, 3521 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:03,245 INFO L231 Difference]: Finished difference. Result has 167 places, 251 transitions, 2850 flow [2024-06-21 17:49:03,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2850, PETRI_PLACES=167, PETRI_TRANSITIONS=251} [2024-06-21 17:49:03,246 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-21 17:49:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 251 transitions, 2850 flow [2024-06-21 17:49:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:03,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:03,246 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 17:49:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:49:03,247 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash 947473459, now seen corresponding path program 1 times [2024-06-21 17:49:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332906287] [2024-06-21 17:49:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:03,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:06,048 INFO 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 17:49:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332906287] [2024-06-21 17:49:06,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332906287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:06,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:06,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652154788] [2024-06-21 17:49:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:06,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:06,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:06,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:06,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 251 transitions, 2850 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:06,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:06,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:06,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:09,379 INFO L124 PetriNetUnfolderBase]: 9228/12975 cut-off events. [2024-06-21 17:49:09,379 INFO L125 PetriNetUnfolderBase]: For 478911/478923 co-relation queries the response was YES. [2024-06-21 17:49:09,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94312 conditions, 12975 events. 9228/12975 cut-off events. For 478911/478923 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70886 event pairs, 3086 based on Foata normal form. 14/12984 useless extension candidates. Maximal degree in co-relation 94234. Up to 12445 conditions per place. [2024-06-21 17:49:09,539 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 241 selfloop transitions, 61 changer transitions 0/308 dead transitions. [2024-06-21 17:49:09,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 308 transitions, 4142 flow [2024-06-21 17:49:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 17:49:09,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-21 17:49:09,541 INFO L175 Difference]: Start difference. First operand has 167 places, 251 transitions, 2850 flow. Second operand 7 states and 171 transitions. [2024-06-21 17:49:09,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 308 transitions, 4142 flow [2024-06-21 17:49:10,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 308 transitions, 4045 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:10,541 INFO L231 Difference]: Finished difference. Result has 170 places, 263 transitions, 3206 flow [2024-06-21 17:49:10,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3206, PETRI_PLACES=170, PETRI_TRANSITIONS=263} [2024-06-21 17:49:10,542 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-21 17:49:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 263 transitions, 3206 flow [2024-06-21 17:49:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:10,542 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 17:49:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:49:10,543 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:10,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash 952235059, now seen corresponding path program 2 times [2024-06-21 17:49:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542068041] [2024-06-21 17:49:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:13,450 INFO 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 17:49:13,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:13,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542068041] [2024-06-21 17:49:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542068041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:13,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:13,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440617051] [2024-06-21 17:49:13,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:13,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:13,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 263 transitions, 3206 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:13,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:13,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:13,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:16,456 INFO L124 PetriNetUnfolderBase]: 9266/13032 cut-off events. [2024-06-21 17:49:16,456 INFO L125 PetriNetUnfolderBase]: For 513508/513512 co-relation queries the response was YES. [2024-06-21 17:49:16,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96819 conditions, 13032 events. 9266/13032 cut-off events. For 513508/513512 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71180 event pairs, 3068 based on Foata normal form. 6/13035 useless extension candidates. Maximal degree in co-relation 96740. Up to 12591 conditions per place. [2024-06-21 17:49:16,608 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 263 selfloop transitions, 41 changer transitions 0/310 dead transitions. [2024-06-21 17:49:16,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 310 transitions, 4083 flow [2024-06-21 17:49:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:49:16,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 17:49:16,632 INFO L175 Difference]: Start difference. First operand has 170 places, 263 transitions, 3206 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:49:16,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 310 transitions, 4083 flow [2024-06-21 17:49:17,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 310 transitions, 3908 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-21 17:49:17,544 INFO L231 Difference]: Finished difference. Result has 175 places, 271 transitions, 3287 flow [2024-06-21 17:49:17,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3287, PETRI_PLACES=175, PETRI_TRANSITIONS=271} [2024-06-21 17:49:17,544 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-21 17:49:17,544 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 271 transitions, 3287 flow [2024-06-21 17:49:17,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:17,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:17,545 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 17:49:17,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:49:17,545 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:17,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:17,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2143583283, now seen corresponding path program 3 times [2024-06-21 17:49:17,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:17,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928709132] [2024-06-21 17:49:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:17,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:20,048 INFO 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 17:49:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928709132] [2024-06-21 17:49:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928709132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:20,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:20,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:20,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640105063] [2024-06-21 17:49:20,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:20,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:20,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:20,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 271 transitions, 3287 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:20,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:20,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:20,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:23,222 INFO L124 PetriNetUnfolderBase]: 9285/13062 cut-off events. [2024-06-21 17:49:23,222 INFO L125 PetriNetUnfolderBase]: For 534757/534797 co-relation queries the response was YES. [2024-06-21 17:49:23,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97137 conditions, 13062 events. 9285/13062 cut-off events. For 534757/534797 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71425 event pairs, 3086 based on Foata normal form. 31/13086 useless extension candidates. Maximal degree in co-relation 97056. Up to 12510 conditions per place. [2024-06-21 17:49:23,365 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 244 selfloop transitions, 68 changer transitions 0/318 dead transitions. [2024-06-21 17:49:23,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 318 transitions, 4401 flow [2024-06-21 17:49:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 17:49:23,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 17:49:23,373 INFO L175 Difference]: Start difference. First operand has 175 places, 271 transitions, 3287 flow. Second operand 7 states and 167 transitions. [2024-06-21 17:49:23,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 318 transitions, 4401 flow [2024-06-21 17:49:24,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 318 transitions, 4255 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:24,163 INFO L231 Difference]: Finished difference. Result has 177 places, 275 transitions, 3385 flow [2024-06-21 17:49:24,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3385, PETRI_PLACES=177, PETRI_TRANSITIONS=275} [2024-06-21 17:49:24,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-06-21 17:49:24,163 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 275 transitions, 3385 flow [2024-06-21 17:49:24,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:24,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:24,164 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 17:49:24,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:49:24,164 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:24,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2140908493, now seen corresponding path program 4 times [2024-06-21 17:49:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:24,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974996146] [2024-06-21 17:49:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:24,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:26,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974996146] [2024-06-21 17:49:26,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974996146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:26,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:26,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:26,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080000635] [2024-06-21 17:49:26,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:26,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:26,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:26,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:26,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:26,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 275 transitions, 3385 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:26,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:26,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:26,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:29,856 INFO L124 PetriNetUnfolderBase]: 9304/13087 cut-off events. [2024-06-21 17:49:29,856 INFO L125 PetriNetUnfolderBase]: For 556964/556999 co-relation queries the response was YES. [2024-06-21 17:49:29,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98163 conditions, 13087 events. 9304/13087 cut-off events. For 556964/556999 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71550 event pairs, 3086 based on Foata normal form. 27/13107 useless extension candidates. Maximal degree in co-relation 98081. Up to 12530 conditions per place. [2024-06-21 17:49:30,222 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 235 selfloop transitions, 74 changer transitions 0/315 dead transitions. [2024-06-21 17:49:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 315 transitions, 4351 flow [2024-06-21 17:49:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 17:49:30,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 17:49:30,225 INFO L175 Difference]: Start difference. First operand has 177 places, 275 transitions, 3385 flow. Second operand 7 states and 161 transitions. [2024-06-21 17:49:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 315 transitions, 4351 flow [2024-06-21 17:49:30,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 315 transitions, 4083 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:30,960 INFO L231 Difference]: Finished difference. Result has 178 places, 279 transitions, 3380 flow [2024-06-21 17:49:30,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3380, PETRI_PLACES=178, PETRI_TRANSITIONS=279} [2024-06-21 17:49:30,960 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-21 17:49:30,960 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 279 transitions, 3380 flow [2024-06-21 17:49:30,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:30,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:30,961 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 17:49:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:49:30,961 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:30,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1107754699, now seen corresponding path program 5 times [2024-06-21 17:49:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:30,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380990977] [2024-06-21 17:49:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:33,449 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 17:49:33,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380990977] [2024-06-21 17:49:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380990977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:33,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:33,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:33,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325953169] [2024-06-21 17:49:33,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:33,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:33,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:33,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:33,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:33,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:33,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 279 transitions, 3380 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:33,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:33,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:33,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:36,578 INFO L124 PetriNetUnfolderBase]: 9297/13069 cut-off events. [2024-06-21 17:49:36,578 INFO L125 PetriNetUnfolderBase]: For 577243/577265 co-relation queries the response was YES. [2024-06-21 17:49:36,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98431 conditions, 13069 events. 9297/13069 cut-off events. For 577243/577265 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71388 event pairs, 3109 based on Foata normal form. 17/13076 useless extension candidates. Maximal degree in co-relation 98349. Up to 12477 conditions per place. [2024-06-21 17:49:36,727 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 229 selfloop transitions, 80 changer transitions 0/315 dead transitions. [2024-06-21 17:49:36,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 315 transitions, 4250 flow [2024-06-21 17:49:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 17:49:36,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 17:49:36,729 INFO L175 Difference]: Start difference. First operand has 178 places, 279 transitions, 3380 flow. Second operand 6 states and 148 transitions. [2024-06-21 17:49:36,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 315 transitions, 4250 flow [2024-06-21 17:49:37,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 315 transitions, 4015 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:37,651 INFO L231 Difference]: Finished difference. Result has 180 places, 279 transitions, 3323 flow [2024-06-21 17:49:37,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3323, PETRI_PLACES=180, PETRI_TRANSITIONS=279} [2024-06-21 17:49:37,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-21 17:49:37,652 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 279 transitions, 3323 flow [2024-06-21 17:49:37,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:37,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:37,652 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 17:49:37,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:49:37,652 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:37,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash 304164091, now seen corresponding path program 6 times [2024-06-21 17:49:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233039255] [2024-06-21 17:49:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:40,430 INFO 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 17:49:40,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:40,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233039255] [2024-06-21 17:49:40,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233039255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:40,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:40,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:40,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002888274] [2024-06-21 17:49:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:40,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:40,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:40,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:40,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 279 transitions, 3323 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:40,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:40,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:40,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:43,817 INFO L124 PetriNetUnfolderBase]: 9290/13064 cut-off events. [2024-06-21 17:49:43,818 INFO L125 PetriNetUnfolderBase]: For 597931/597935 co-relation queries the response was YES. [2024-06-21 17:49:43,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98895 conditions, 13064 events. 9290/13064 cut-off events. For 597931/597935 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71321 event pairs, 3067 based on Foata normal form. 6/13067 useless extension candidates. Maximal degree in co-relation 98812. Up to 12470 conditions per place. [2024-06-21 17:49:43,977 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 247 selfloop transitions, 82 changer transitions 0/335 dead transitions. [2024-06-21 17:49:43,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 335 transitions, 4155 flow [2024-06-21 17:49:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 17:49:43,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:49:43,979 INFO L175 Difference]: Start difference. First operand has 180 places, 279 transitions, 3323 flow. Second operand 8 states and 196 transitions. [2024-06-21 17:49:43,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 335 transitions, 4155 flow [2024-06-21 17:49:44,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 335 transitions, 3865 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:44,960 INFO L231 Difference]: Finished difference. Result has 181 places, 279 transitions, 3240 flow [2024-06-21 17:49:44,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3240, PETRI_PLACES=181, PETRI_TRANSITIONS=279} [2024-06-21 17:49:44,961 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-21 17:49:44,961 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 279 transitions, 3240 flow [2024-06-21 17:49:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:44,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:44,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:44,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:49:44,962 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:44,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2143757517, now seen corresponding path program 1 times [2024-06-21 17:49:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236757351] [2024-06-21 17:49:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:47,531 INFO 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 17:49:47,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:47,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236757351] [2024-06-21 17:49:47,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236757351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:47,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:47,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:47,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148918628] [2024-06-21 17:49:47,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:47,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:47,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:47,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 279 transitions, 3240 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:47,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:47,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:47,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:50,725 INFO L124 PetriNetUnfolderBase]: 9322/13106 cut-off events. [2024-06-21 17:49:50,725 INFO L125 PetriNetUnfolderBase]: For 596019/596023 co-relation queries the response was YES. [2024-06-21 17:49:50,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99281 conditions, 13106 events. 9322/13106 cut-off events. For 596019/596023 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71606 event pairs, 2923 based on Foata normal form. 8/13110 useless extension candidates. Maximal degree in co-relation 99198. Up to 12681 conditions per place. [2024-06-21 17:49:50,875 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 290 selfloop transitions, 29 changer transitions 0/325 dead transitions. [2024-06-21 17:49:50,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 325 transitions, 4316 flow [2024-06-21 17:49:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 17:49:50,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-21 17:49:50,888 INFO L175 Difference]: Start difference. First operand has 181 places, 279 transitions, 3240 flow. Second operand 7 states and 163 transitions. [2024-06-21 17:49:50,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 325 transitions, 4316 flow [2024-06-21 17:49:51,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 325 transitions, 4122 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 17:49:51,794 INFO L231 Difference]: Finished difference. Result has 180 places, 285 transitions, 3310 flow [2024-06-21 17:49:51,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3310, PETRI_PLACES=180, PETRI_TRANSITIONS=285} [2024-06-21 17:49:51,795 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-21 17:49:51,795 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 285 transitions, 3310 flow [2024-06-21 17:49:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:51,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:51,796 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 17:49:51,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:49:51,796 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:51,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1053830923, now seen corresponding path program 2 times [2024-06-21 17:49:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123624751] [2024-06-21 17:49:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:54,041 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 17:49:54,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:54,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123624751] [2024-06-21 17:49:54,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123624751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:54,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:54,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:54,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939816557] [2024-06-21 17:49:54,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:54,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:54,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:49:54,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 285 transitions, 3310 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:54,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:54,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:49:54,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:57,490 INFO L124 PetriNetUnfolderBase]: 9354/13151 cut-off events. [2024-06-21 17:49:57,490 INFO L125 PetriNetUnfolderBase]: For 582778/582782 co-relation queries the response was YES. [2024-06-21 17:49:57,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99573 conditions, 13151 events. 9354/13151 cut-off events. For 582778/582782 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 71776 event pairs, 3073 based on Foata normal form. 8/13155 useless extension candidates. Maximal degree in co-relation 99490. Up to 12803 conditions per place. [2024-06-21 17:49:57,839 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 291 selfloop transitions, 24 changer transitions 0/321 dead transitions. [2024-06-21 17:49:57,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 321 transitions, 4132 flow [2024-06-21 17:49:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 17:49:57,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:49:57,841 INFO L175 Difference]: Start difference. First operand has 180 places, 285 transitions, 3310 flow. Second operand 7 states and 156 transitions. [2024-06-21 17:49:57,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 321 transitions, 4132 flow [2024-06-21 17:49:58,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 321 transitions, 3967 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:58,546 INFO L231 Difference]: Finished difference. Result has 184 places, 288 transitions, 3305 flow [2024-06-21 17:49:58,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3305, PETRI_PLACES=184, PETRI_TRANSITIONS=288} [2024-06-21 17:49:58,548 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-21 17:49:58,548 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 288 transitions, 3305 flow [2024-06-21 17:49:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:58,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:58,549 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 17:49:58,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:49:58,549 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:49:58,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:58,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1484547029, now seen corresponding path program 3 times [2024-06-21 17:49:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:58,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269588049] [2024-06-21 17:49:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:00,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269588049] [2024-06-21 17:50:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269588049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:00,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:50:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508946726] [2024-06-21 17:50:00,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:00,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:50:00,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:50:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:50:00,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:50:00,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 288 transitions, 3305 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:00,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:00,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:50:00,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:04,090 INFO L124 PetriNetUnfolderBase]: 9342/13134 cut-off events. [2024-06-21 17:50:04,091 INFO L125 PetriNetUnfolderBase]: For 602513/602517 co-relation queries the response was YES. [2024-06-21 17:50:04,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99580 conditions, 13134 events. 9342/13134 cut-off events. For 602513/602517 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71663 event pairs, 2921 based on Foata normal form. 8/13138 useless extension candidates. Maximal degree in co-relation 99495. Up to 12760 conditions per place. [2024-06-21 17:50:04,230 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 291 selfloop transitions, 23 changer transitions 0/320 dead transitions. [2024-06-21 17:50:04,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 320 transitions, 4025 flow [2024-06-21 17:50:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:50:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:50:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 17:50:04,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-21 17:50:04,235 INFO L175 Difference]: Start difference. First operand has 184 places, 288 transitions, 3305 flow. Second operand 6 states and 142 transitions. [2024-06-21 17:50:04,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 320 transitions, 4025 flow [2024-06-21 17:50:04,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 320 transitions, 3869 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:04,996 INFO L231 Difference]: Finished difference. Result has 185 places, 288 transitions, 3207 flow [2024-06-21 17:50:04,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3207, PETRI_PLACES=185, PETRI_TRANSITIONS=288} [2024-06-21 17:50:04,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-21 17:50:04,997 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 288 transitions, 3207 flow [2024-06-21 17:50:04,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:04,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:04,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:50:04,998 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:50:04,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1741166529, now seen corresponding path program 1 times [2024-06-21 17:50:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90990684] [2024-06-21 17:50:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:06,487 INFO 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 17:50:06,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90990684] [2024-06-21 17:50:06,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90990684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:06,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:06,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:50:06,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431138779] [2024-06-21 17:50:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:06,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:50:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:50:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:50:06,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:50:06,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 288 transitions, 3207 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 17:50:06,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:06,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:50:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:09,393 INFO L124 PetriNetUnfolderBase]: 8183/11869 cut-off events. [2024-06-21 17:50:09,393 INFO L125 PetriNetUnfolderBase]: For 618973/619431 co-relation queries the response was YES. [2024-06-21 17:50:09,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92140 conditions, 11869 events. 8183/11869 cut-off events. For 618973/619431 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 68913 event pairs, 2808 based on Foata normal form. 8/11686 useless extension candidates. Maximal degree in co-relation 92054. Up to 10877 conditions per place. [2024-06-21 17:50:09,519 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 227 selfloop transitions, 18 changer transitions 0/306 dead transitions. [2024-06-21 17:50:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 306 transitions, 3745 flow [2024-06-21 17:50:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:50:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:50:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 17:50:09,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 17:50:09,522 INFO L175 Difference]: Start difference. First operand has 185 places, 288 transitions, 3207 flow. Second operand 5 states and 122 transitions. [2024-06-21 17:50:09,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 306 transitions, 3745 flow [2024-06-21 17:50:10,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 306 transitions, 3677 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:10,512 INFO L231 Difference]: Finished difference. Result has 185 places, 288 transitions, 3185 flow [2024-06-21 17:50:10,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3185, PETRI_PLACES=185, PETRI_TRANSITIONS=288} [2024-06-21 17:50:10,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-21 17:50:10,514 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 288 transitions, 3185 flow [2024-06-21 17:50:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 17:50:10,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:10,514 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 17:50:10,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:50:10,514 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:50:10,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1222861511, now seen corresponding path program 1 times [2024-06-21 17:50:10,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:10,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999207652] [2024-06-21 17:50:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:10,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999207652] [2024-06-21 17:50:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999207652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:14,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741814681] [2024-06-21 17:50:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:14,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:14,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:50:14,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 288 transitions, 3185 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:14,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:14,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:50:14,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:17,548 INFO L124 PetriNetUnfolderBase]: 9253/13021 cut-off events. [2024-06-21 17:50:17,549 INFO L125 PetriNetUnfolderBase]: For 626281/626285 co-relation queries the response was YES. [2024-06-21 17:50:17,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99762 conditions, 13021 events. 9253/13021 cut-off events. For 626281/626285 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71330 event pairs, 2987 based on Foata normal form. 6/13024 useless extension candidates. Maximal degree in co-relation 99675. Up to 12546 conditions per place. [2024-06-21 17:50:17,683 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 291 selfloop transitions, 49 changer transitions 0/346 dead transitions. [2024-06-21 17:50:17,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 346 transitions, 4137 flow [2024-06-21 17:50:17,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 17:50:17,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-21 17:50:17,686 INFO L175 Difference]: Start difference. First operand has 185 places, 288 transitions, 3185 flow. Second operand 8 states and 193 transitions. [2024-06-21 17:50:17,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 346 transitions, 4137 flow [2024-06-21 17:50:18,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 346 transitions, 4091 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:18,422 INFO L231 Difference]: Finished difference. Result has 189 places, 292 transitions, 3364 flow [2024-06-21 17:50:18,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3364, PETRI_PLACES=189, PETRI_TRANSITIONS=292} [2024-06-21 17:50:18,422 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-21 17:50:18,423 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 292 transitions, 3364 flow [2024-06-21 17:50:18,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:18,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:18,423 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 17:50:18,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:50:18,423 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:50:18,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash 142916815, now seen corresponding path program 2 times [2024-06-21 17:50:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:18,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369875122] [2024-06-21 17:50:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:22,231 INFO 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 17:50:22,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:22,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369875122] [2024-06-21 17:50:22,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369875122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:22,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:22,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:22,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429683340] [2024-06-21 17:50:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:22,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:50:22,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 292 transitions, 3364 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:22,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:22,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:50:22,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:25,878 INFO L124 PetriNetUnfolderBase]: 9298/13069 cut-off events. [2024-06-21 17:50:25,879 INFO L125 PetriNetUnfolderBase]: For 667140/667152 co-relation queries the response was YES. [2024-06-21 17:50:26,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102974 conditions, 13069 events. 9298/13069 cut-off events. For 667140/667152 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 71459 event pairs, 3005 based on Foata normal form. 14/13078 useless extension candidates. Maximal degree in co-relation 102887. Up to 12278 conditions per place. [2024-06-21 17:50:26,226 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 246 selfloop transitions, 107 changer transitions 0/359 dead transitions. [2024-06-21 17:50:26,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 359 transitions, 4890 flow [2024-06-21 17:50:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:50:26,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 17:50:26,228 INFO L175 Difference]: Start difference. First operand has 189 places, 292 transitions, 3364 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:50:26,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 359 transitions, 4890 flow [2024-06-21 17:50:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 359 transitions, 4695 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:27,074 INFO L231 Difference]: Finished difference. Result has 191 places, 304 transitions, 3754 flow [2024-06-21 17:50:27,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3754, PETRI_PLACES=191, PETRI_TRANSITIONS=304} [2024-06-21 17:50:27,075 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-21 17:50:27,075 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 304 transitions, 3754 flow [2024-06-21 17:50:27,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:27,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:27,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:27,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:50:27,076 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:50:27,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash -693092056, now seen corresponding path program 1 times [2024-06-21 17:50:27,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:27,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504451482] [2024-06-21 17:50:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:27,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat