./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_power.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/safe025_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_power.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --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 22:02:53,749 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:02:53,808 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:02:53,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:02:53,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:02:53,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:02:53,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:02:53,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:02:53,839 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:02:53,842 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:02:53,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:02:53,842 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:02:53,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:02:53,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:02:53,844 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:02:53,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:02:53,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:02:53,844 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:02:53,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:02:53,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:02:53,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:02:53,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:02:53,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:02:53,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:02:53,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:02:53,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:02:53,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:02:53,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:02:53,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:02:53,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:02:53,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:02:53,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:02:53,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:02:53,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:02:53,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:02:53,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:02:54,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:02:54,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:02:54,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:02:54,041 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:02:54,042 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:02:54,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_power.yml/witness.yml [2024-06-21 22:02:54,220 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:02:54,220 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:02:54,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-21 22:02:55,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:02:55,366 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:02:55,367 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-21 22:02:55,379 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190cff6fb/b063a65178364c948aefd82f8203aeca/FLAG300c9f5e1 [2024-06-21 22:02:55,392 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190cff6fb/b063a65178364c948aefd82f8203aeca [2024-06-21 22:02:55,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:02:55,394 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:02:55,395 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:02:55,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:02:55,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:02:55,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:02:54" (1/2) ... [2024-06-21 22:02:55,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bd3182 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:55, skipping insertion in model container [2024-06-21 22:02:55,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:02:54" (1/2) ... [2024-06-21 22:02:55,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@531ca138 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:55, skipping insertion in model container [2024-06-21 22:02:55,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:02:55" (2/2) ... [2024-06-21 22:02:55,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bd3182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:55, skipping insertion in model container [2024-06-21 22:02:55,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:02:55" (2/2) ... [2024-06-21 22:02:55,402 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:02:55,582 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:02:55,584 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 22:02:55,584 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 22:02:55,584 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((((((((((! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2)) && ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 22:02:55,584 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:02:55,584 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-21 22:02:55,622 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:02:55,989 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:02:55,997 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:02:56,136 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:02:56,183 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:02:56,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56 WrapperNode [2024-06-21 22:02:56,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:02:56,184 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:02:56,185 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:02:56,185 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:02:56,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,249 INFO L138 Inliner]: procedures = 175, calls = 111, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 342 [2024-06-21 22:02:56,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:02:56,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:02:56,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:02:56,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:02:56,259 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,264 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,282 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 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 22:02:56,282 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,282 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:02:56,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:02:56,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:02:56,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:02:56,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (1/1) ... [2024-06-21 22:02:56,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:02:56,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:02:56,339 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 22:02:56,361 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 22:02:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 22:02:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 22:02:56,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 22:02:56,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 22:02:56,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:02:56,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:02:56,387 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:02:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:02:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:02:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:02:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:02:56,388 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:02:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:02:56,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 22:02:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:02:56,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:02:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:02:56,392 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 22:02:56,547 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:02:56,549 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:02:57,163 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:02:57,164 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:02:57,565 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:02:57,566 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:02:57,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:02:57 BoogieIcfgContainer [2024-06-21 22:02:57,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:02:57,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:02:57,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:02:57,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:02:57,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:02:54" (1/4) ... [2024-06-21 22:02:57,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d29f508 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:02:57, skipping insertion in model container [2024-06-21 22:02:57,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:02:55" (2/4) ... [2024-06-21 22:02:57,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d29f508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:02:57, skipping insertion in model container [2024-06-21 22:02:57,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:56" (3/4) ... [2024-06-21 22:02:57,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d29f508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:02:57, skipping insertion in model container [2024-06-21 22:02:57,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:02:57" (4/4) ... [2024-06-21 22:02:57,573 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_power.i [2024-06-21 22:02:57,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:02:57,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 22:02:57,587 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:02:57,644 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:02:57,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 22:02:57,693 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 22:02:57,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:02:57,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:02:57,696 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 22:02:57,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 22:02:57,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:02:57,710 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;@759e4ea1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:02:57,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 22:02:57,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:02:57,714 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 22:02:57,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:02:57,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:57,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:02:57,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:57,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1085515767, now seen corresponding path program 1 times [2024-06-21 22:02:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497643995] [2024-06-21 22:02:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:59,139 INFO 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 22:02:59,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497643995] [2024-06-21 22:02:59,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497643995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:59,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:02:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458134668] [2024-06-21 22:02:59,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:59,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:02:59,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:59,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:02:59,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:02:59,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 22:02:59,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:59,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:59,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 22:02:59,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:59,759 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-21 22:02:59,760 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 22:02:59,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9443 event pairs, 800 based on Foata normal form. 1/1877 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-21 22:02:59,781 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 22:02:59,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-21 22:02:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:02:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:02:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 22:02:59,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-21 22:02:59,792 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-21 22:02:59,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-21 22:02:59,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:59,796 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 22:02:59,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 22:02:59,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 22:02:59,799 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 22:02:59,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:59,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:59,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:59,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:02:59,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:59,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -495377294, now seen corresponding path program 1 times [2024-06-21 22:02:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576424954] [2024-06-21 22:02:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:59,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576424954] [2024-06-21 22:03:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576424954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:01,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:03:01,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995855510] [2024-06-21 22:03:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:03:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:03:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:03:01,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:01,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:01,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:01,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:01,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:01,585 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-21 22:03:01,586 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-21 22:03:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10169 event pairs, 654 based on Foata normal form. 6/2135 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-21 22:03:01,595 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 22:03:01,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-21 22:03:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:03:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:03:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 22:03:01,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-21 22:03:01,597 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-21 22:03:01,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-21 22:03:01,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:03:01,599 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 22:03:01,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 22:03:01,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 22:03:01,600 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 22:03:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:01,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:01,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:01,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:03:01,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:01,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash 36094320, now seen corresponding path program 1 times [2024-06-21 22:03:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:01,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384917619] [2024-06-21 22:03:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:03,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:03,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384917619] [2024-06-21 22:03:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384917619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:03,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:03,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:03:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237415632] [2024-06-21 22:03:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:03,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:03:03,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:03:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:03:03,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:03,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:03,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:03,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:03,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:04,639 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-21 22:03:04,640 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-21 22:03:04,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10076 event pairs, 485 based on Foata normal form. 6/2120 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-21 22:03:04,649 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 22:03:04,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-21 22:03:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:04,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 22:03:04,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 22:03:04,652 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-21 22:03:04,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-21 22:03:04,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:04,654 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-21 22:03:04,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 22:03:04,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-21 22:03:04,655 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-21 22:03:04,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:04,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:04,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:03:04,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:04,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash -991970893, now seen corresponding path program 1 times [2024-06-21 22:03:04,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:04,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225959203] [2024-06-21 22:03:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:05,895 INFO 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 22:03:05,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:05,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225959203] [2024-06-21 22:03:05,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225959203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:05,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:05,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:03:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917684629] [2024-06-21 22:03:05,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:05,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:03:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:03:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:03:05,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:05,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:05,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:05,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:05,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:06,461 INFO L124 PetriNetUnfolderBase]: 1179/1872 cut-off events. [2024-06-21 22:03:06,461 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2024-06-21 22:03:06,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 1872 events. 1179/1872 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9184 event pairs, 492 based on Foata normal form. 2/1872 useless extension candidates. Maximal degree in co-relation 5155. Up to 1767 conditions per place. [2024-06-21 22:03:06,470 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 22:03:06,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 341 flow [2024-06-21 22:03:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:03:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:03:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 22:03:06,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 22:03:06,474 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-21 22:03:06,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 341 flow [2024-06-21 22:03:06,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:06,478 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-21 22:03:06,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-21 22:03:06,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 22:03:06,480 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-21 22:03:06,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:06,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:06,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:06,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:03:06,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:06,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash -686324679, now seen corresponding path program 1 times [2024-06-21 22:03:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416430776] [2024-06-21 22:03:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:06,560 INFO 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 22:03:06,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416430776] [2024-06-21 22:03:06,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416430776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:06,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:06,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 22:03:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415510189] [2024-06-21 22:03:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:03:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:03:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:03:06,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 22:03:06,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:06,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:06,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 22:03:06,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:06,870 INFO L124 PetriNetUnfolderBase]: 717/1268 cut-off events. [2024-06-21 22:03:06,870 INFO L125 PetriNetUnfolderBase]: For 1668/1700 co-relation queries the response was YES. [2024-06-21 22:03:06,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 1268 events. 717/1268 cut-off events. For 1668/1700 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7190 event pairs, 322 based on Foata normal form. 107/1304 useless extension candidates. Maximal degree in co-relation 3606. Up to 776 conditions per place. [2024-06-21 22:03:06,879 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 34 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-21 22:03:06,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 339 flow [2024-06-21 22:03:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:03:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:03:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-21 22:03:06,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 22:03:06,883 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 3 states and 78 transitions. [2024-06-21 22:03:06,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 339 flow [2024-06-21 22:03:06,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 320 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:06,889 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 235 flow [2024-06-21 22:03:06,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-21 22:03:06,892 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 22:03:06,892 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 235 flow [2024-06-21 22:03:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:06,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:06,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:06,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:03:06,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:06,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 198527316, now seen corresponding path program 1 times [2024-06-21 22:03:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:06,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583031659] [2024-06-21 22:03:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:06,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:08,453 INFO 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 22:03:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:08,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583031659] [2024-06-21 22:03:08,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583031659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:08,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434832970] [2024-06-21 22:03:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:08,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:08,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:08,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:08,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:08,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:09,261 INFO L124 PetriNetUnfolderBase]: 1519/2370 cut-off events. [2024-06-21 22:03:09,261 INFO L125 PetriNetUnfolderBase]: For 5035/5035 co-relation queries the response was YES. [2024-06-21 22:03:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7812 conditions, 2370 events. 1519/2370 cut-off events. For 5035/5035 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11936 event pairs, 667 based on Foata normal form. 4/2372 useless extension candidates. Maximal degree in co-relation 7794. Up to 2277 conditions per place. [2024-06-21 22:03:09,274 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-21 22:03:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 480 flow [2024-06-21 22:03:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 22:03:09,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 22:03:09,277 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 235 flow. Second operand 6 states and 111 transitions. [2024-06-21 22:03:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 480 flow [2024-06-21 22:03:09,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 462 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 22:03:09,284 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-21 22:03:09,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-21 22:03:09,286 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 22:03:09,287 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-21 22:03:09,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:09,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:09,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:03:09,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:09,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash 198764466, now seen corresponding path program 2 times [2024-06-21 22:03:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:09,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434547594] [2024-06-21 22:03:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:10,755 INFO 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 22:03:10,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:10,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434547594] [2024-06-21 22:03:10,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434547594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:10,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:10,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:10,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366543776] [2024-06-21 22:03:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:10,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:10,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:10,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:10,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:10,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:10,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:10,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:10,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:11,496 INFO L124 PetriNetUnfolderBase]: 1511/2351 cut-off events. [2024-06-21 22:03:11,496 INFO L125 PetriNetUnfolderBase]: For 6082/6082 co-relation queries the response was YES. [2024-06-21 22:03:11,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8124 conditions, 2351 events. 1511/2351 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11835 event pairs, 674 based on Foata normal form. 4/2350 useless extension candidates. Maximal degree in co-relation 8103. Up to 2232 conditions per place. [2024-06-21 22:03:11,510 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-21 22:03:11,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 541 flow [2024-06-21 22:03:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 22:03:11,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 22:03:11,512 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-21 22:03:11,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 541 flow [2024-06-21 22:03:11,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 502 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:11,516 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 351 flow [2024-06-21 22:03:11,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-21 22:03:11,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 22:03:11,517 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 351 flow [2024-06-21 22:03:11,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:11,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:11,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:03:11,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:11,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1668742389, now seen corresponding path program 1 times [2024-06-21 22:03:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889216767] [2024-06-21 22:03:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:13,308 INFO 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 22:03:13,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889216767] [2024-06-21 22:03:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889216767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:13,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674868717] [2024-06-21 22:03:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:13,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:13,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:13,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:13,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:13,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:13,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:14,282 INFO L124 PetriNetUnfolderBase]: 1548/2427 cut-off events. [2024-06-21 22:03:14,282 INFO L125 PetriNetUnfolderBase]: For 8302/8302 co-relation queries the response was YES. [2024-06-21 22:03:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8932 conditions, 2427 events. 1548/2427 cut-off events. For 8302/8302 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12269 event pairs, 665 based on Foata normal form. 2/2427 useless extension candidates. Maximal degree in co-relation 8910. Up to 2313 conditions per place. [2024-06-21 22:03:14,292 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-21 22:03:14,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 704 flow [2024-06-21 22:03:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:03:14,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 22:03:14,294 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 351 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:03:14,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 704 flow [2024-06-21 22:03:14,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 641 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:14,298 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 424 flow [2024-06-21 22:03:14,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=424, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 22:03:14,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 22:03:14,299 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 424 flow [2024-06-21 22:03:14,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:14,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:14,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:14,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:03:14,300 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:14,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1707950343, now seen corresponding path program 2 times [2024-06-21 22:03:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:14,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983607101] [2024-06-21 22:03:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:16,169 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 22:03:16,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:16,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983607101] [2024-06-21 22:03:16,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983607101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:16,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:16,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600946717] [2024-06-21 22:03:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:16,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:16,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:16,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:16,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:16,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:16,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:16,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:17,153 INFO L124 PetriNetUnfolderBase]: 1545/2422 cut-off events. [2024-06-21 22:03:17,154 INFO L125 PetriNetUnfolderBase]: For 10269/10269 co-relation queries the response was YES. [2024-06-21 22:03:17,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2422 events. 1545/2422 cut-off events. For 10269/10269 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12244 event pairs, 664 based on Foata normal form. 2/2422 useless extension candidates. Maximal degree in co-relation 9331. Up to 2278 conditions per place. [2024-06-21 22:03:17,166 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-21 22:03:17,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 732 flow [2024-06-21 22:03:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:03:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:03:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 22:03:17,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:03:17,168 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 424 flow. Second operand 7 states and 129 transitions. [2024-06-21 22:03:17,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 732 flow [2024-06-21 22:03:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 689 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:17,176 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 465 flow [2024-06-21 22:03:17,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-21 22:03:17,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-21 22:03:17,177 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 465 flow [2024-06-21 22:03:17,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:17,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:17,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:03:17,178 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:17,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1571074650, now seen corresponding path program 1 times [2024-06-21 22:03:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:17,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80699256] [2024-06-21 22:03:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:17,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:18,853 INFO 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 22:03:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80699256] [2024-06-21 22:03:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80699256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:18,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:03:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970272089] [2024-06-21 22:03:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:18,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:03:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:03:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:03:18,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:18,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:18,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:18,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:18,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:19,603 INFO L124 PetriNetUnfolderBase]: 1289/2078 cut-off events. [2024-06-21 22:03:19,604 INFO L125 PetriNetUnfolderBase]: For 10671/10671 co-relation queries the response was YES. [2024-06-21 22:03:19,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8387 conditions, 2078 events. 1289/2078 cut-off events. For 10671/10671 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10679 event pairs, 524 based on Foata normal form. 2/2078 useless extension candidates. Maximal degree in co-relation 8361. Up to 1982 conditions per place. [2024-06-21 22:03:19,614 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 70 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-21 22:03:19,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 671 flow [2024-06-21 22:03:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:03:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:03:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 22:03:19,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 22:03:19,616 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 465 flow. Second operand 5 states and 90 transitions. [2024-06-21 22:03:19,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 671 flow [2024-06-21 22:03:19,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 609 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:19,624 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 449 flow [2024-06-21 22:03:19,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-21 22:03:19,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-21 22:03:19,626 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 449 flow [2024-06-21 22:03:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:19,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:03:19,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:19,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1412361543, now seen corresponding path program 1 times [2024-06-21 22:03:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:19,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20673831] [2024-06-21 22:03:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:19,763 INFO 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 22:03:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20673831] [2024-06-21 22:03:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20673831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:19,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:19,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384773709] [2024-06-21 22:03:19,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:03:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:03:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:03:19,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 22:03:19,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 449 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 22:03:19,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:19,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 22:03:19,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:20,069 INFO L124 PetriNetUnfolderBase]: 814/1489 cut-off events. [2024-06-21 22:03:20,069 INFO L125 PetriNetUnfolderBase]: For 7899/7992 co-relation queries the response was YES. [2024-06-21 22:03:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5821 conditions, 1489 events. 814/1489 cut-off events. For 7899/7992 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8617 event pairs, 306 based on Foata normal form. 87/1496 useless extension candidates. Maximal degree in co-relation 5794. Up to 728 conditions per place. [2024-06-21 22:03:20,078 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 37 selfloop transitions, 24 changer transitions 0/81 dead transitions. [2024-06-21 22:03:20,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 603 flow [2024-06-21 22:03:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:03:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:03:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-21 22:03:20,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 22:03:20,079 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 449 flow. Second operand 5 states and 101 transitions. [2024-06-21 22:03:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 603 flow [2024-06-21 22:03:20,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 581 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:20,084 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 497 flow [2024-06-21 22:03:20,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-21 22:03:20,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-21 22:03:20,085 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 497 flow [2024-06-21 22:03:20,085 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 22:03:20,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:20,085 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 22:03:20,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:03:20,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:20,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash -831628714, now seen corresponding path program 1 times [2024-06-21 22:03:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:20,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483579090] [2024-06-21 22:03:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483579090] [2024-06-21 22:03:21,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483579090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:21,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:21,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299344575] [2024-06-21 22:03:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:21,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:21,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:21,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:21,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 497 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:21,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:21,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:21,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:22,658 INFO L124 PetriNetUnfolderBase]: 1483/2377 cut-off events. [2024-06-21 22:03:22,658 INFO L125 PetriNetUnfolderBase]: For 13081/13081 co-relation queries the response was YES. [2024-06-21 22:03:22,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 2377 events. 1483/2377 cut-off events. For 13081/13081 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12306 event pairs, 526 based on Foata normal form. 4/2379 useless extension candidates. Maximal degree in co-relation 9991. Up to 2143 conditions per place. [2024-06-21 22:03:22,670 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2024-06-21 22:03:22,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 893 flow [2024-06-21 22:03:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:03:22,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 22:03:22,681 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 497 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:03:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 893 flow [2024-06-21 22:03:22,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 890 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:22,691 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 602 flow [2024-06-21 22:03:22,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=602, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-21 22:03:22,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-21 22:03:22,692 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 602 flow [2024-06-21 22:03:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:22,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:22,692 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 22:03:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:03:22,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash -601734238, now seen corresponding path program 2 times [2024-06-21 22:03:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583475187] [2024-06-21 22:03:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:24,647 INFO 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 22:03:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:24,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583475187] [2024-06-21 22:03:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583475187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:24,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:24,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667406853] [2024-06-21 22:03:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:24,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:24,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:24,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 602 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:24,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:24,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:24,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:25,710 INFO L124 PetriNetUnfolderBase]: 1491/2397 cut-off events. [2024-06-21 22:03:25,710 INFO L125 PetriNetUnfolderBase]: For 15726/15726 co-relation queries the response was YES. [2024-06-21 22:03:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10516 conditions, 2397 events. 1491/2397 cut-off events. For 15726/15726 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12454 event pairs, 534 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 10485. Up to 2135 conditions per place. [2024-06-21 22:03:25,752 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-06-21 22:03:25,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 961 flow [2024-06-21 22:03:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:03:25,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 22:03:25,755 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 602 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:03:25,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 961 flow [2024-06-21 22:03:25,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 901 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:25,768 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 621 flow [2024-06-21 22:03:25,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-21 22:03:25,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 22:03:25,769 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 621 flow [2024-06-21 22:03:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:25,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:25,769 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 22:03:25,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:03:25,769 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:25,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1291230894, now seen corresponding path program 3 times [2024-06-21 22:03:25,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:25,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932321075] [2024-06-21 22:03:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:25,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:27,762 INFO 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 22:03:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932321075] [2024-06-21 22:03:27,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932321075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:27,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:27,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68506034] [2024-06-21 22:03:27,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:27,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:27,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:27,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:27,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:27,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:27,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:27,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:28,875 INFO L124 PetriNetUnfolderBase]: 1487/2389 cut-off events. [2024-06-21 22:03:28,876 INFO L125 PetriNetUnfolderBase]: For 17742/17742 co-relation queries the response was YES. [2024-06-21 22:03:28,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10662 conditions, 2389 events. 1487/2389 cut-off events. For 17742/17742 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12443 event pairs, 666 based on Foata normal form. 4/2391 useless extension candidates. Maximal degree in co-relation 10630. Up to 2201 conditions per place. [2024-06-21 22:03:28,886 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-21 22:03:28,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 953 flow [2024-06-21 22:03:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:03:28,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 22:03:28,888 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 621 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:03:28,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 953 flow [2024-06-21 22:03:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 891 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:28,903 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 610 flow [2024-06-21 22:03:28,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=610, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2024-06-21 22:03:28,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-21 22:03:28,904 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 610 flow [2024-06-21 22:03:28,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:28,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:28,904 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 22:03:28,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:03:28,905 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:28,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -919240066, now seen corresponding path program 4 times [2024-06-21 22:03:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043597117] [2024-06-21 22:03:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:30,943 INFO 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 22:03:30,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043597117] [2024-06-21 22:03:30,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043597117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:30,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:30,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:30,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514100521] [2024-06-21 22:03:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:30,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:30,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:30,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:30,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 610 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:30,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:30,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:30,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:32,014 INFO L124 PetriNetUnfolderBase]: 1495/2409 cut-off events. [2024-06-21 22:03:32,015 INFO L125 PetriNetUnfolderBase]: For 17748/17748 co-relation queries the response was YES. [2024-06-21 22:03:32,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2409 events. 1495/2409 cut-off events. For 17748/17748 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12602 event pairs, 666 based on Foata normal form. 4/2411 useless extension candidates. Maximal degree in co-relation 10690. Up to 2255 conditions per place. [2024-06-21 22:03:32,025 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-21 22:03:32,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 114 transitions, 955 flow [2024-06-21 22:03:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:03:32,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 22:03:32,027 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 610 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:03:32,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 114 transitions, 955 flow [2024-06-21 22:03:32,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 898 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:32,068 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 622 flow [2024-06-21 22:03:32,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=622, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2024-06-21 22:03:32,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-21 22:03:32,084 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 622 flow [2024-06-21 22:03:32,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:32,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:32,085 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 22:03:32,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:03:32,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:32,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1259484001, now seen corresponding path program 1 times [2024-06-21 22:03:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:32,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083788813] [2024-06-21 22:03:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:32,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:34,035 INFO 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 22:03:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083788813] [2024-06-21 22:03:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083788813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577057824] [2024-06-21 22:03:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:34,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:34,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:34,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:34,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 622 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:34,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:34,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:34,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:35,017 INFO L124 PetriNetUnfolderBase]: 1505/2424 cut-off events. [2024-06-21 22:03:35,018 INFO L125 PetriNetUnfolderBase]: For 20054/20054 co-relation queries the response was YES. [2024-06-21 22:03:35,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11011 conditions, 2424 events. 1505/2424 cut-off events. For 20054/20054 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12728 event pairs, 653 based on Foata normal form. 2/2424 useless extension candidates. Maximal degree in co-relation 10976. Up to 2261 conditions per place. [2024-06-21 22:03:35,028 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 83 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-21 22:03:35,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 995 flow [2024-06-21 22:03:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 22:03:35,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 22:03:35,030 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 622 flow. Second operand 6 states and 110 transitions. [2024-06-21 22:03:35,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 995 flow [2024-06-21 22:03:35,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 111 transitions, 951 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:35,047 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 718 flow [2024-06-21 22:03:35,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2024-06-21 22:03:35,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 22:03:35,048 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 718 flow [2024-06-21 22:03:35,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:35,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:35,048 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 22:03:35,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:03:35,048 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:35,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1433498578, now seen corresponding path program 5 times [2024-06-21 22:03:35,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:35,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991835302] [2024-06-21 22:03:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:37,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:37,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991835302] [2024-06-21 22:03:37,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991835302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:37,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:37,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:37,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759339442] [2024-06-21 22:03:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:37,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:37,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:37,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:37,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:37,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:38,130 INFO L124 PetriNetUnfolderBase]: 1501/2420 cut-off events. [2024-06-21 22:03:38,130 INFO L125 PetriNetUnfolderBase]: For 23573/23573 co-relation queries the response was YES. [2024-06-21 22:03:38,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11518 conditions, 2420 events. 1501/2420 cut-off events. For 23573/23573 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12695 event pairs, 660 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 11481. Up to 2228 conditions per place. [2024-06-21 22:03:38,141 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 95 selfloop transitions, 20 changer transitions 0/120 dead transitions. [2024-06-21 22:03:38,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1028 flow [2024-06-21 22:03:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:03:38,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 22:03:38,143 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 718 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:03:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1028 flow [2024-06-21 22:03:38,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1010 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 22:03:38,163 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 733 flow [2024-06-21 22:03:38,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=733, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2024-06-21 22:03:38,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 22:03:38,169 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 733 flow [2024-06-21 22:03:38,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:38,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:38,169 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 22:03:38,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:03:38,169 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:38,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1271864161, now seen corresponding path program 2 times [2024-06-21 22:03:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:38,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897502986] [2024-06-21 22:03:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:38,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:40,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:40,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897502986] [2024-06-21 22:03:40,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897502986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:40,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:40,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122538320] [2024-06-21 22:03:40,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:40,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:40,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:40,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:40,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:40,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 733 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:40,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:40,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:40,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:41,024 INFO L124 PetriNetUnfolderBase]: 1495/2402 cut-off events. [2024-06-21 22:03:41,025 INFO L125 PetriNetUnfolderBase]: For 26368/26368 co-relation queries the response was YES. [2024-06-21 22:03:41,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11762 conditions, 2402 events. 1495/2402 cut-off events. For 26368/26368 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12527 event pairs, 665 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 11721. Up to 2248 conditions per place. [2024-06-21 22:03:41,035 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 74 selfloop transitions, 23 changer transitions 0/102 dead transitions. [2024-06-21 22:03:41,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 967 flow [2024-06-21 22:03:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 22:03:41,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-21 22:03:41,037 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 733 flow. Second operand 6 states and 101 transitions. [2024-06-21 22:03:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 967 flow [2024-06-21 22:03:41,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 102 transitions, 899 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:41,051 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 717 flow [2024-06-21 22:03:41,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2024-06-21 22:03:41,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-21 22:03:41,052 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 717 flow [2024-06-21 22:03:41,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:41,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:41,052 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 22:03:41,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:03:41,052 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:41,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:41,053 INFO L85 PathProgramCache]: Analyzing trace with hash -931197353, now seen corresponding path program 1 times [2024-06-21 22:03:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:41,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881456449] [2024-06-21 22:03:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:41,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:43,459 INFO 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 22:03:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881456449] [2024-06-21 22:03:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881456449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:43,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:43,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:43,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194551104] [2024-06-21 22:03:43,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:43,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:43,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 717 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:43,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:43,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:44,059 INFO L124 PetriNetUnfolderBase]: 1346/2211 cut-off events. [2024-06-21 22:03:44,059 INFO L125 PetriNetUnfolderBase]: For 26196/26196 co-relation queries the response was YES. [2024-06-21 22:03:44,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2211 events. 1346/2211 cut-off events. For 26196/26196 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11810 event pairs, 544 based on Foata normal form. 2/2183 useless extension candidates. Maximal degree in co-relation 10891. Up to 2076 conditions per place. [2024-06-21 22:03:44,108 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 90 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-06-21 22:03:44,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 996 flow [2024-06-21 22:03:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 22:03:44,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 22:03:44,109 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 717 flow. Second operand 6 states and 105 transitions. [2024-06-21 22:03:44,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 996 flow [2024-06-21 22:03:44,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 946 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:44,129 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 724 flow [2024-06-21 22:03:44,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-06-21 22:03:44,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-21 22:03:44,130 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 724 flow [2024-06-21 22:03:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:44,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:44,131 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 22:03:44,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:03:44,131 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:44,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1271871105, now seen corresponding path program 2 times [2024-06-21 22:03:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:44,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429894265] [2024-06-21 22:03:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:44,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:45,900 INFO 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 22:03:45,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429894265] [2024-06-21 22:03:45,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429894265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:45,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:45,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:45,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005505341] [2024-06-21 22:03:45,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:45,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:45,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:45,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 724 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:45,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:45,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:45,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:46,829 INFO L124 PetriNetUnfolderBase]: 1509/2485 cut-off events. [2024-06-21 22:03:46,830 INFO L125 PetriNetUnfolderBase]: For 30907/30907 co-relation queries the response was YES. [2024-06-21 22:03:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12826 conditions, 2485 events. 1509/2485 cut-off events. For 30907/30907 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13657 event pairs, 442 based on Foata normal form. 5/2460 useless extension candidates. Maximal degree in co-relation 12783. Up to 1944 conditions per place. [2024-06-21 22:03:46,844 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-21 22:03:46,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 126 transitions, 1161 flow [2024-06-21 22:03:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:03:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:03:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:03:46,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 22:03:46,845 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 724 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:03:46,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 126 transitions, 1161 flow [2024-06-21 22:03:46,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1131 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:46,873 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 986 flow [2024-06-21 22:03:46,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=986, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2024-06-21 22:03:46,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 22:03:46,874 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 986 flow [2024-06-21 22:03:46,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:46,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:46,874 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 22:03:46,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:03:46,874 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:46,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash 389300365, now seen corresponding path program 1 times [2024-06-21 22:03:46,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:46,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060730738] [2024-06-21 22:03:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:46,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:49,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:49,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060730738] [2024-06-21 22:03:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060730738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:49,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872442986] [2024-06-21 22:03:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:49,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:49,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 986 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:49,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:49,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:49,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:50,219 INFO L124 PetriNetUnfolderBase]: 1703/2752 cut-off events. [2024-06-21 22:03:50,219 INFO L125 PetriNetUnfolderBase]: For 43305/43305 co-relation queries the response was YES. [2024-06-21 22:03:50,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 2752 events. 1703/2752 cut-off events. For 43305/43305 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14923 event pairs, 682 based on Foata normal form. 4/2754 useless extension candidates. Maximal degree in co-relation 15946. Up to 2528 conditions per place. [2024-06-21 22:03:50,236 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 100 selfloop transitions, 32 changer transitions 0/137 dead transitions. [2024-06-21 22:03:50,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 137 transitions, 1468 flow [2024-06-21 22:03:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:03:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:03:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:03:50,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 22:03:50,238 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 986 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:03:50,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 137 transitions, 1468 flow [2024-06-21 22:03:50,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 137 transitions, 1440 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:50,275 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1120 flow [2024-06-21 22:03:50,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1120, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-21 22:03:50,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-21 22:03:50,275 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1120 flow [2024-06-21 22:03:50,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:50,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:50,276 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 22:03:50,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:03:50,276 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:50,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1641616183, now seen corresponding path program 2 times [2024-06-21 22:03:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:50,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430312603] [2024-06-21 22:03:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:50,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:52,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:52,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430312603] [2024-06-21 22:03:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430312603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:52,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:52,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338510304] [2024-06-21 22:03:52,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:52,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:52,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:52,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:52,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:52,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:53,702 INFO L124 PetriNetUnfolderBase]: 1723/2780 cut-off events. [2024-06-21 22:03:53,702 INFO L125 PetriNetUnfolderBase]: For 49900/49900 co-relation queries the response was YES. [2024-06-21 22:03:53,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16790 conditions, 2780 events. 1723/2780 cut-off events. For 49900/49900 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15074 event pairs, 687 based on Foata normal form. 4/2782 useless extension candidates. Maximal degree in co-relation 16741. Up to 2662 conditions per place. [2024-06-21 22:03:53,718 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-21 22:03:53,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 1469 flow [2024-06-21 22:03:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:03:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:03:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 22:03:53,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-21 22:03:53,719 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1120 flow. Second operand 7 states and 111 transitions. [2024-06-21 22:03:53,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 1469 flow [2024-06-21 22:03:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 129 transitions, 1420 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:53,761 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 1165 flow [2024-06-21 22:03:53,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1165, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-21 22:03:53,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 22:03:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 1165 flow [2024-06-21 22:03:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:53,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:53,762 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 22:03:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:03:53,762 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:53,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1110398445, now seen corresponding path program 3 times [2024-06-21 22:03:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:53,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690260421] [2024-06-21 22:03:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690260421] [2024-06-21 22:03:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690260421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:56,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:56,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276999187] [2024-06-21 22:03:56,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:56,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:56,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:03:56,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 1165 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:56,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:56,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:03:56,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:57,282 INFO L124 PetriNetUnfolderBase]: 1711/2752 cut-off events. [2024-06-21 22:03:57,282 INFO L125 PetriNetUnfolderBase]: For 53482/53482 co-relation queries the response was YES. [2024-06-21 22:03:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16845 conditions, 2752 events. 1711/2752 cut-off events. For 53482/53482 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14833 event pairs, 674 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 16794. Up to 2536 conditions per place. [2024-06-21 22:03:57,298 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-21 22:03:57,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 132 transitions, 1497 flow [2024-06-21 22:03:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:03:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:03:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:03:57,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 22:03:57,300 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 1165 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:03:57,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 132 transitions, 1497 flow [2024-06-21 22:03:57,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 132 transitions, 1401 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:57,335 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 1145 flow [2024-06-21 22:03:57,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1145, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-21 22:03:57,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 22:03:57,336 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 1145 flow [2024-06-21 22:03:57,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:57,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:57,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:57,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:03:57,337 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:57,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1197654941, now seen corresponding path program 1 times [2024-06-21 22:03:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99473132] [2024-06-21 22:03:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:59,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99473132] [2024-06-21 22:03:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99473132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:59,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:59,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574118559] [2024-06-21 22:03:59,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:59,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:59,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:03:59,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 1145 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:59,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:59,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:03:59,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:00,725 INFO L124 PetriNetUnfolderBase]: 1520/2505 cut-off events. [2024-06-21 22:04:00,726 INFO L125 PetriNetUnfolderBase]: For 50764/50777 co-relation queries the response was YES. [2024-06-21 22:04:00,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15470 conditions, 2505 events. 1520/2505 cut-off events. For 50764/50777 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13785 event pairs, 518 based on Foata normal form. 15/2489 useless extension candidates. Maximal degree in co-relation 15420. Up to 2352 conditions per place. [2024-06-21 22:04:00,738 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2024-06-21 22:04:00,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 140 transitions, 1546 flow [2024-06-21 22:04:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 22:04:00,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 22:04:00,739 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 1145 flow. Second operand 7 states and 118 transitions. [2024-06-21 22:04:00,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 140 transitions, 1546 flow [2024-06-21 22:04:00,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 140 transitions, 1444 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:00,770 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 1179 flow [2024-06-21 22:04:00,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1179, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-06-21 22:04:00,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-21 22:04:00,770 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 1179 flow [2024-06-21 22:04:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:00,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:00,771 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 22:04:00,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:04:00,771 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:00,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 773546667, now seen corresponding path program 1 times [2024-06-21 22:04:00,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:00,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938145952] [2024-06-21 22:04:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:00,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:03,671 INFO 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 22:04:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938145952] [2024-06-21 22:04:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938145952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:03,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:03,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368443553] [2024-06-21 22:04:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:03,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:03,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 1179 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:03,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:03,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:03,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:04,766 INFO L124 PetriNetUnfolderBase]: 1697/2749 cut-off events. [2024-06-21 22:04:04,766 INFO L125 PetriNetUnfolderBase]: For 60855/60855 co-relation queries the response was YES. [2024-06-21 22:04:04,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17385 conditions, 2749 events. 1697/2749 cut-off events. For 60855/60855 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14848 event pairs, 612 based on Foata normal form. 2/2749 useless extension candidates. Maximal degree in co-relation 17333. Up to 2637 conditions per place. [2024-06-21 22:04:04,783 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 15 changer transitions 0/138 dead transitions. [2024-06-21 22:04:04,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 138 transitions, 1520 flow [2024-06-21 22:04:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 22:04:04,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-21 22:04:04,784 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 1179 flow. Second operand 7 states and 109 transitions. [2024-06-21 22:04:04,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 138 transitions, 1520 flow [2024-06-21 22:04:04,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 138 transitions, 1472 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:04,830 INFO L231 Difference]: Finished difference. Result has 118 places, 125 transitions, 1207 flow [2024-06-21 22:04:04,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=118, PETRI_TRANSITIONS=125} [2024-06-21 22:04:04,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-21 22:04:04,831 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 125 transitions, 1207 flow [2024-06-21 22:04:04,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:04,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:04,831 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 22:04:04,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:04:04,832 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:04,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:04,832 INFO L85 PathProgramCache]: Analyzing trace with hash -822310400, now seen corresponding path program 1 times [2024-06-21 22:04:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:04,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275095989] [2024-06-21 22:04:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:04,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:07,298 INFO 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 22:04:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275095989] [2024-06-21 22:04:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275095989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:07,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771133880] [2024-06-21 22:04:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:07,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:07,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:07,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 125 transitions, 1207 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:07,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:07,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:07,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:08,201 INFO L124 PetriNetUnfolderBase]: 1707/2762 cut-off events. [2024-06-21 22:04:08,202 INFO L125 PetriNetUnfolderBase]: For 64707/64707 co-relation queries the response was YES. [2024-06-21 22:04:08,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17790 conditions, 2762 events. 1707/2762 cut-off events. For 64707/64707 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14862 event pairs, 602 based on Foata normal form. 2/2762 useless extension candidates. Maximal degree in co-relation 17737. Up to 2606 conditions per place. [2024-06-21 22:04:08,219 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 18 changer transitions 0/152 dead transitions. [2024-06-21 22:04:08,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 152 transitions, 1620 flow [2024-06-21 22:04:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:04:08,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 22:04:08,221 INFO L175 Difference]: Start difference. First operand has 118 places, 125 transitions, 1207 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:04:08,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 152 transitions, 1620 flow [2024-06-21 22:04:08,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 152 transitions, 1569 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:08,274 INFO L231 Difference]: Finished difference. Result has 120 places, 129 transitions, 1255 flow [2024-06-21 22:04:08,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1255, PETRI_PLACES=120, PETRI_TRANSITIONS=129} [2024-06-21 22:04:08,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-21 22:04:08,275 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 129 transitions, 1255 flow [2024-06-21 22:04:08,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:08,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:08,275 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 22:04:08,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:04:08,276 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:08,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 95298290, now seen corresponding path program 2 times [2024-06-21 22:04:08,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:08,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816197538] [2024-06-21 22:04:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:08,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:10,169 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 22:04:10,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816197538] [2024-06-21 22:04:10,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816197538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:10,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:10,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:10,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790742036] [2024-06-21 22:04:10,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:10,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:10,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:10,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 1255 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:10,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:10,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:10,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:11,129 INFO L124 PetriNetUnfolderBase]: 1716/2782 cut-off events. [2024-06-21 22:04:11,130 INFO L125 PetriNetUnfolderBase]: For 70953/70953 co-relation queries the response was YES. [2024-06-21 22:04:11,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18514 conditions, 2782 events. 1716/2782 cut-off events. For 70953/70953 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15068 event pairs, 603 based on Foata normal form. 3/2783 useless extension candidates. Maximal degree in co-relation 18460. Up to 2591 conditions per place. [2024-06-21 22:04:11,149 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 123 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-06-21 22:04:11,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 154 transitions, 1681 flow [2024-06-21 22:04:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:04:11,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 22:04:11,153 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 1255 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:04:11,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 154 transitions, 1681 flow [2024-06-21 22:04:11,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 154 transitions, 1621 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:11,222 INFO L231 Difference]: Finished difference. Result has 122 places, 132 transitions, 1299 flow [2024-06-21 22:04:11,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1299, PETRI_PLACES=122, PETRI_TRANSITIONS=132} [2024-06-21 22:04:11,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-21 22:04:11,223 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 132 transitions, 1299 flow [2024-06-21 22:04:11,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:11,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:11,224 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 22:04:11,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:04:11,225 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:11,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1539789738, now seen corresponding path program 3 times [2024-06-21 22:04:11,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:11,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241817654] [2024-06-21 22:04:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:11,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:13,918 INFO 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 22:04:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241817654] [2024-06-21 22:04:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241817654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:13,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394823277] [2024-06-21 22:04:13,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:13,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:13,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:13,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 132 transitions, 1299 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:13,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:13,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:13,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:14,724 INFO L124 PetriNetUnfolderBase]: 1726/2796 cut-off events. [2024-06-21 22:04:14,724 INFO L125 PetriNetUnfolderBase]: For 77166/77166 co-relation queries the response was YES. [2024-06-21 22:04:14,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19132 conditions, 2796 events. 1726/2796 cut-off events. For 77166/77166 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15127 event pairs, 605 based on Foata normal form. 2/2791 useless extension candidates. Maximal degree in co-relation 19077. Up to 2602 conditions per place. [2024-06-21 22:04:14,739 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 129 selfloop transitions, 22 changer transitions 0/156 dead transitions. [2024-06-21 22:04:14,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1724 flow [2024-06-21 22:04:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:04:14,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 22:04:14,741 INFO L175 Difference]: Start difference. First operand has 122 places, 132 transitions, 1299 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:04:14,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1724 flow [2024-06-21 22:04:14,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 156 transitions, 1648 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:14,783 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 1342 flow [2024-06-21 22:04:14,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2024-06-21 22:04:14,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 22:04:14,784 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 1342 flow [2024-06-21 22:04:14,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:14,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:14,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:14,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:04:14,784 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:14,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1527409578, now seen corresponding path program 4 times [2024-06-21 22:04:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:14,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728487295] [2024-06-21 22:04:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:14,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:17,761 INFO 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 22:04:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:17,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728487295] [2024-06-21 22:04:17,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728487295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:17,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:17,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535464737] [2024-06-21 22:04:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:17,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:17,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:17,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 1342 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:17,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:17,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:17,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:18,409 INFO L124 PetriNetUnfolderBase]: 1723/2790 cut-off events. [2024-06-21 22:04:18,409 INFO L125 PetriNetUnfolderBase]: For 83148/83148 co-relation queries the response was YES. [2024-06-21 22:04:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19680 conditions, 2790 events. 1723/2790 cut-off events. For 83148/83148 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15093 event pairs, 611 based on Foata normal form. 1/2784 useless extension candidates. Maximal degree in co-relation 19624. Up to 2586 conditions per place. [2024-06-21 22:04:18,428 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 122 selfloop transitions, 31 changer transitions 0/158 dead transitions. [2024-06-21 22:04:18,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 158 transitions, 1776 flow [2024-06-21 22:04:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 22:04:18,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-21 22:04:18,430 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 1342 flow. Second operand 7 states and 116 transitions. [2024-06-21 22:04:18,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 158 transitions, 1776 flow [2024-06-21 22:04:18,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 158 transitions, 1696 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:18,490 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1434 flow [2024-06-21 22:04:18,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2024-06-21 22:04:18,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-21 22:04:18,491 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1434 flow [2024-06-21 22:04:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:18,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:18,491 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 22:04:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:04:18,492 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:18,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1804164608, now seen corresponding path program 5 times [2024-06-21 22:04:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:18,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819341974] [2024-06-21 22:04:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:18,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:20,525 INFO 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 22:04:20,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:20,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819341974] [2024-06-21 22:04:20,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819341974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:20,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:20,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:20,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732570160] [2024-06-21 22:04:20,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:20,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:20,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:20,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:20,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1434 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:20,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:20,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:20,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:21,535 INFO L124 PetriNetUnfolderBase]: 1727/2795 cut-off events. [2024-06-21 22:04:21,535 INFO L125 PetriNetUnfolderBase]: For 90208/90208 co-relation queries the response was YES. [2024-06-21 22:04:21,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20219 conditions, 2795 events. 1727/2795 cut-off events. For 90208/90208 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15197 event pairs, 612 based on Foata normal form. 3/2787 useless extension candidates. Maximal degree in co-relation 20161. Up to 2608 conditions per place. [2024-06-21 22:04:21,555 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 128 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2024-06-21 22:04:21,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 159 transitions, 1862 flow [2024-06-21 22:04:21,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 22:04:21,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-21 22:04:21,557 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1434 flow. Second operand 7 states and 113 transitions. [2024-06-21 22:04:21,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 159 transitions, 1862 flow [2024-06-21 22:04:21,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1807 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:21,616 INFO L231 Difference]: Finished difference. Result has 131 places, 145 transitions, 1495 flow [2024-06-21 22:04:21,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=131, PETRI_TRANSITIONS=145} [2024-06-21 22:04:21,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 22:04:21,616 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 1495 flow [2024-06-21 22:04:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:21,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:21,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:21,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:04:21,617 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:21,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1071229896, now seen corresponding path program 6 times [2024-06-21 22:04:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076755280] [2024-06-21 22:04:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:23,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076755280] [2024-06-21 22:04:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076755280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:23,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:23,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538400841] [2024-06-21 22:04:23,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:23,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:23,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:23,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 1495 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:23,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:23,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:23,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:24,550 INFO L124 PetriNetUnfolderBase]: 1723/2795 cut-off events. [2024-06-21 22:04:24,550 INFO L125 PetriNetUnfolderBase]: For 95921/95921 co-relation queries the response was YES. [2024-06-21 22:04:24,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20688 conditions, 2795 events. 1723/2795 cut-off events. For 95921/95921 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15184 event pairs, 594 based on Foata normal form. 2/2786 useless extension candidates. Maximal degree in co-relation 20628. Up to 2584 conditions per place. [2024-06-21 22:04:24,569 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 126 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-21 22:04:24,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 163 transitions, 1933 flow [2024-06-21 22:04:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 22:04:24,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-21 22:04:24,571 INFO L175 Difference]: Start difference. First operand has 131 places, 145 transitions, 1495 flow. Second operand 7 states and 113 transitions. [2024-06-21 22:04:24,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 163 transitions, 1933 flow [2024-06-21 22:04:24,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 163 transitions, 1845 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:24,623 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1551 flow [2024-06-21 22:04:24,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1551, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-21 22:04:24,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-21 22:04:24,624 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1551 flow [2024-06-21 22:04:24,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:24,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:24,624 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 22:04:24,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:04:24,625 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:24,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1527400650, now seen corresponding path program 1 times [2024-06-21 22:04:24,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:24,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728560116] [2024-06-21 22:04:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:24,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:27,229 INFO 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 22:04:27,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:27,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728560116] [2024-06-21 22:04:27,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728560116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:27,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:27,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:27,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430505350] [2024-06-21 22:04:27,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:27,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:27,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:27,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:27,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:27,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:04:27,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1551 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:27,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:27,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:04:27,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:28,163 INFO L124 PetriNetUnfolderBase]: 1653/2726 cut-off events. [2024-06-21 22:04:28,163 INFO L125 PetriNetUnfolderBase]: For 104668/104723 co-relation queries the response was YES. [2024-06-21 22:04:28,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20607 conditions, 2726 events. 1653/2726 cut-off events. For 104668/104723 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15131 event pairs, 536 based on Foata normal form. 6/2715 useless extension candidates. Maximal degree in co-relation 20545. Up to 2494 conditions per place. [2024-06-21 22:04:28,183 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 20 changer transitions 0/171 dead transitions. [2024-06-21 22:04:28,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 171 transitions, 1962 flow [2024-06-21 22:04:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:04:28,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 22:04:28,185 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1551 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:04:28,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 171 transitions, 1962 flow [2024-06-21 22:04:28,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 171 transitions, 1894 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:28,254 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1566 flow [2024-06-21 22:04:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-21 22:04:28,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 22:04:28,254 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1566 flow [2024-06-21 22:04:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:28,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:28,255 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 22:04:28,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:04:28,255 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:28,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1789864928, now seen corresponding path program 1 times [2024-06-21 22:04:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529372940] [2024-06-21 22:04:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:30,901 INFO 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 22:04:30,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529372940] [2024-06-21 22:04:30,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529372940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:30,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:30,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:30,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911951689] [2024-06-21 22:04:30,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:30,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:30,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:30,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:30,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:30,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:31,882 INFO L124 PetriNetUnfolderBase]: 1726/2803 cut-off events. [2024-06-21 22:04:31,882 INFO L125 PetriNetUnfolderBase]: For 107714/107714 co-relation queries the response was YES. [2024-06-21 22:04:31,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21585 conditions, 2803 events. 1726/2803 cut-off events. For 107714/107714 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15298 event pairs, 627 based on Foata normal form. 1/2802 useless extension candidates. Maximal degree in co-relation 21521. Up to 2680 conditions per place. [2024-06-21 22:04:31,902 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 147 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2024-06-21 22:04:31,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1979 flow [2024-06-21 22:04:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 22:04:31,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-21 22:04:31,903 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1566 flow. Second operand 7 states and 109 transitions. [2024-06-21 22:04:31,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1979 flow [2024-06-21 22:04:31,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 169 transitions, 1920 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:31,971 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1597 flow [2024-06-21 22:04:31,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-06-21 22:04:31,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-21 22:04:31,971 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1597 flow [2024-06-21 22:04:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:31,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:31,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:31,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:04:31,972 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:31,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash 99905276, now seen corresponding path program 1 times [2024-06-21 22:04:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126061402] [2024-06-21 22:04:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:34,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126061402] [2024-06-21 22:04:34,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126061402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:34,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:34,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:34,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430122449] [2024-06-21 22:04:34,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:34,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:34,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:34,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:34,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:34,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:34,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:34,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:35,382 INFO L124 PetriNetUnfolderBase]: 1791/2901 cut-off events. [2024-06-21 22:04:35,382 INFO L125 PetriNetUnfolderBase]: For 117385/117385 co-relation queries the response was YES. [2024-06-21 22:04:35,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22620 conditions, 2901 events. 1791/2901 cut-off events. For 117385/117385 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15872 event pairs, 597 based on Foata normal form. 3/2901 useless extension candidates. Maximal degree in co-relation 22555. Up to 2669 conditions per place. [2024-06-21 22:04:35,403 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 35 changer transitions 0/197 dead transitions. [2024-06-21 22:04:35,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 197 transitions, 2328 flow [2024-06-21 22:04:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:04:35,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 22:04:35,406 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1597 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:04:35,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 197 transitions, 2328 flow [2024-06-21 22:04:35,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 197 transitions, 2284 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:35,494 INFO L231 Difference]: Finished difference. Result has 144 places, 170 transitions, 1868 flow [2024-06-21 22:04:35,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1868, PETRI_PLACES=144, PETRI_TRANSITIONS=170} [2024-06-21 22:04:35,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 22:04:35,495 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 170 transitions, 1868 flow [2024-06-21 22:04:35,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:35,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:35,495 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 22:04:35,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:04:35,496 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:35,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -778629926, now seen corresponding path program 1 times [2024-06-21 22:04:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:35,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625772123] [2024-06-21 22:04:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:35,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:38,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:38,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625772123] [2024-06-21 22:04:38,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625772123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:38,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:38,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180055395] [2024-06-21 22:04:38,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:38,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:38,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:38,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 170 transitions, 1868 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:38,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:38,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:38,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:39,322 INFO L124 PetriNetUnfolderBase]: 1811/2928 cut-off events. [2024-06-21 22:04:39,322 INFO L125 PetriNetUnfolderBase]: For 126592/126592 co-relation queries the response was YES. [2024-06-21 22:04:39,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23793 conditions, 2928 events. 1811/2928 cut-off events. For 126592/126592 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15963 event pairs, 586 based on Foata normal form. 4/2930 useless extension candidates. Maximal degree in co-relation 23726. Up to 2746 conditions per place. [2024-06-21 22:04:39,344 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 172 selfloop transitions, 22 changer transitions 0/199 dead transitions. [2024-06-21 22:04:39,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 199 transitions, 2421 flow [2024-06-21 22:04:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:04:39,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 22:04:39,346 INFO L175 Difference]: Start difference. First operand has 144 places, 170 transitions, 1868 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:04:39,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 199 transitions, 2421 flow [2024-06-21 22:04:39,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 199 transitions, 2335 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:39,432 INFO L231 Difference]: Finished difference. Result has 148 places, 174 transitions, 1922 flow [2024-06-21 22:04:39,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1922, PETRI_PLACES=148, PETRI_TRANSITIONS=174} [2024-06-21 22:04:39,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-21 22:04:39,432 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 174 transitions, 1922 flow [2024-06-21 22:04:39,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:39,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:39,433 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 22:04:39,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:04:39,433 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:39,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 277036982, now seen corresponding path program 2 times [2024-06-21 22:04:39,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541826312] [2024-06-21 22:04:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:41,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:41,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541826312] [2024-06-21 22:04:41,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541826312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:41,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:41,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:41,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909694160] [2024-06-21 22:04:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:41,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:41,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 174 transitions, 1922 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:41,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:41,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:41,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:42,956 INFO L124 PetriNetUnfolderBase]: 1861/3008 cut-off events. [2024-06-21 22:04:42,956 INFO L125 PetriNetUnfolderBase]: For 141086/141086 co-relation queries the response was YES. [2024-06-21 22:04:42,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25209 conditions, 3008 events. 1861/3008 cut-off events. For 141086/141086 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16523 event pairs, 563 based on Foata normal form. 5/3011 useless extension candidates. Maximal degree in co-relation 25140. Up to 2728 conditions per place. [2024-06-21 22:04:42,979 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 174 selfloop transitions, 42 changer transitions 0/221 dead transitions. [2024-06-21 22:04:42,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 221 transitions, 2883 flow [2024-06-21 22:04:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:04:42,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 22:04:42,981 INFO L175 Difference]: Start difference. First operand has 148 places, 174 transitions, 1922 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:04:42,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 221 transitions, 2883 flow [2024-06-21 22:04:43,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 221 transitions, 2782 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:43,087 INFO L231 Difference]: Finished difference. Result has 152 places, 190 transitions, 2236 flow [2024-06-21 22:04:43,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2236, PETRI_PLACES=152, PETRI_TRANSITIONS=190} [2024-06-21 22:04:43,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 22:04:43,087 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 190 transitions, 2236 flow [2024-06-21 22:04:43,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:43,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:43,088 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 22:04:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:04:43,088 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:43,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1086113572, now seen corresponding path program 3 times [2024-06-21 22:04:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678906401] [2024-06-21 22:04:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:45,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:45,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678906401] [2024-06-21 22:04:45,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678906401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:45,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:45,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:45,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446477303] [2024-06-21 22:04:45,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:45,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:45,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:45,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 190 transitions, 2236 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:45,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:45,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:46,447 INFO L124 PetriNetUnfolderBase]: 1858/3008 cut-off events. [2024-06-21 22:04:46,447 INFO L125 PetriNetUnfolderBase]: For 150728/150728 co-relation queries the response was YES. [2024-06-21 22:04:46,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25708 conditions, 3008 events. 1858/3008 cut-off events. For 150728/150728 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16537 event pairs, 561 based on Foata normal form. 8/3014 useless extension candidates. Maximal degree in co-relation 25636. Up to 2728 conditions per place. [2024-06-21 22:04:46,470 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 167 selfloop transitions, 49 changer transitions 0/221 dead transitions. [2024-06-21 22:04:46,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 2912 flow [2024-06-21 22:04:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:04:46,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 22:04:46,472 INFO L175 Difference]: Start difference. First operand has 152 places, 190 transitions, 2236 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:04:46,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 2912 flow [2024-06-21 22:04:46,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 221 transitions, 2786 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-21 22:04:46,564 INFO L231 Difference]: Finished difference. Result has 158 places, 194 transitions, 2314 flow [2024-06-21 22:04:46,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2314, PETRI_PLACES=158, PETRI_TRANSITIONS=194} [2024-06-21 22:04:46,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 22:04:46,565 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 194 transitions, 2314 flow [2024-06-21 22:04:46,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:46,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:46,565 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 22:04:46,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:04:46,565 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:46,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:46,566 INFO L85 PathProgramCache]: Analyzing trace with hash 455560972, now seen corresponding path program 1 times [2024-06-21 22:04:46,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:46,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025413002] [2024-06-21 22:04:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:46,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:49,839 INFO 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 22:04:49,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:49,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025413002] [2024-06-21 22:04:49,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025413002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:49,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:49,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77208953] [2024-06-21 22:04:49,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:49,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:49,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:49,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:49,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:49,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 194 transitions, 2314 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:49,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:49,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:49,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:51,347 INFO L124 PetriNetUnfolderBase]: 1902/3074 cut-off events. [2024-06-21 22:04:51,348 INFO L125 PetriNetUnfolderBase]: For 163449/163449 co-relation queries the response was YES. [2024-06-21 22:04:51,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 3074 events. 1902/3074 cut-off events. For 163449/163449 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16916 event pairs, 551 based on Foata normal form. 12/3084 useless extension candidates. Maximal degree in co-relation 26682. Up to 2772 conditions per place. [2024-06-21 22:04:51,373 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 42 changer transitions 0/224 dead transitions. [2024-06-21 22:04:51,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 224 transitions, 2971 flow [2024-06-21 22:04:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 22:04:51,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 22:04:51,375 INFO L175 Difference]: Start difference. First operand has 158 places, 194 transitions, 2314 flow. Second operand 8 states and 142 transitions. [2024-06-21 22:04:51,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 224 transitions, 2971 flow [2024-06-21 22:04:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 224 transitions, 2827 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:51,490 INFO L231 Difference]: Finished difference. Result has 160 places, 195 transitions, 2287 flow [2024-06-21 22:04:51,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2287, PETRI_PLACES=160, PETRI_TRANSITIONS=195} [2024-06-21 22:04:51,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 22:04:51,491 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 195 transitions, 2287 flow [2024-06-21 22:04:51,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:51,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:51,491 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 22:04:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:04:51,492 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:51,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -488839624, now seen corresponding path program 4 times [2024-06-21 22:04:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:51,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699934128] [2024-06-21 22:04:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:54,583 INFO 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 22:04:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699934128] [2024-06-21 22:04:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699934128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:54,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345151510] [2024-06-21 22:04:54,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:54,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:54,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 195 transitions, 2287 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:54,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:54,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:54,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:55,491 INFO L124 PetriNetUnfolderBase]: 1922/3104 cut-off events. [2024-06-21 22:04:55,492 INFO L125 PetriNetUnfolderBase]: For 168820/168820 co-relation queries the response was YES. [2024-06-21 22:04:55,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27317 conditions, 3104 events. 1922/3104 cut-off events. For 168820/168820 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17109 event pairs, 557 based on Foata normal form. 4/3101 useless extension candidates. Maximal degree in co-relation 27242. Up to 2882 conditions per place. [2024-06-21 22:04:55,517 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 190 selfloop transitions, 26 changer transitions 0/221 dead transitions. [2024-06-21 22:04:55,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 221 transitions, 2896 flow [2024-06-21 22:04:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:04:55,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-21 22:04:55,519 INFO L175 Difference]: Start difference. First operand has 160 places, 195 transitions, 2287 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:04:55,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 221 transitions, 2896 flow [2024-06-21 22:04:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 221 transitions, 2810 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:55,639 INFO L231 Difference]: Finished difference. Result has 162 places, 199 transitions, 2367 flow [2024-06-21 22:04:55,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2367, PETRI_PLACES=162, PETRI_TRANSITIONS=199} [2024-06-21 22:04:55,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-21 22:04:55,642 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 199 transitions, 2367 flow [2024-06-21 22:04:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:55,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:55,642 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 22:04:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:04:55,643 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:55,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash -117941860, now seen corresponding path program 2 times [2024-06-21 22:04:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:55,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132663755] [2024-06-21 22:04:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:55,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:58,278 INFO 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 22:04:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132663755] [2024-06-21 22:04:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132663755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:58,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:58,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091840367] [2024-06-21 22:04:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:58,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:58,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:58,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:04:58,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 199 transitions, 2367 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:58,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:58,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:04:58,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:59,426 INFO L124 PetriNetUnfolderBase]: 1932/3114 cut-off events. [2024-06-21 22:04:59,427 INFO L125 PetriNetUnfolderBase]: For 176687/176687 co-relation queries the response was YES. [2024-06-21 22:04:59,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27958 conditions, 3114 events. 1932/3114 cut-off events. For 176687/176687 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17125 event pairs, 566 based on Foata normal form. 2/3109 useless extension candidates. Maximal degree in co-relation 27882. Up to 2902 conditions per place. [2024-06-21 22:04:59,450 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 26 changer transitions 0/224 dead transitions. [2024-06-21 22:04:59,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 224 transitions, 2942 flow [2024-06-21 22:04:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:04:59,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 22:04:59,452 INFO L175 Difference]: Start difference. First operand has 162 places, 199 transitions, 2367 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:04:59,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 224 transitions, 2942 flow [2024-06-21 22:04:59,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 224 transitions, 2821 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:59,561 INFO L231 Difference]: Finished difference. Result has 164 places, 203 transitions, 2384 flow [2024-06-21 22:04:59,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=164, PETRI_TRANSITIONS=203} [2024-06-21 22:04:59,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 22:04:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 203 transitions, 2384 flow [2024-06-21 22:04:59,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:59,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:59,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:59,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:04:59,562 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:59,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash -105054850, now seen corresponding path program 3 times [2024-06-21 22:04:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307116018] [2024-06-21 22:04:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:02,043 INFO 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 22:05:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307116018] [2024-06-21 22:05:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307116018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918610097] [2024-06-21 22:05:02,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:02,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:02,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 203 transitions, 2384 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:02,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:02,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:03,490 INFO L124 PetriNetUnfolderBase]: 1947/3136 cut-off events. [2024-06-21 22:05:03,490 INFO L125 PetriNetUnfolderBase]: For 184922/184922 co-relation queries the response was YES. [2024-06-21 22:05:03,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28468 conditions, 3136 events. 1947/3136 cut-off events. For 184922/184922 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17243 event pairs, 559 based on Foata normal form. 2/3131 useless extension candidates. Maximal degree in co-relation 28391. Up to 2884 conditions per place. [2024-06-21 22:05:03,518 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 53 changer transitions 0/241 dead transitions. [2024-06-21 22:05:03,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 241 transitions, 3306 flow [2024-06-21 22:05:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 22:05:03,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-21 22:05:03,522 INFO L175 Difference]: Start difference. First operand has 164 places, 203 transitions, 2384 flow. Second operand 10 states and 158 transitions. [2024-06-21 22:05:03,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 241 transitions, 3306 flow [2024-06-21 22:05:03,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 241 transitions, 3215 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:03,658 INFO L231 Difference]: Finished difference. Result has 169 places, 219 transitions, 2740 flow [2024-06-21 22:05:03,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2740, PETRI_PLACES=169, PETRI_TRANSITIONS=219} [2024-06-21 22:05:03,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-21 22:05:03,659 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 219 transitions, 2740 flow [2024-06-21 22:05:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:03,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:03,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:03,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:05:03,660 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:03,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash -842378760, now seen corresponding path program 5 times [2024-06-21 22:05:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606594698] [2024-06-21 22:05:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:06,564 INFO 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 22:05:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:06,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606594698] [2024-06-21 22:05:06,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606594698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:06,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:06,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24744750] [2024-06-21 22:05:06,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:06,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:06,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 219 transitions, 2740 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:06,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:06,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:06,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:07,597 INFO L124 PetriNetUnfolderBase]: 1965/3163 cut-off events. [2024-06-21 22:05:07,598 INFO L125 PetriNetUnfolderBase]: For 205762/205762 co-relation queries the response was YES. [2024-06-21 22:05:07,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29752 conditions, 3163 events. 1965/3163 cut-off events. For 205762/205762 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17413 event pairs, 560 based on Foata normal form. 2/3158 useless extension candidates. Maximal degree in co-relation 29673. Up to 2896 conditions per place. [2024-06-21 22:05:07,623 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 47 changer transitions 0/246 dead transitions. [2024-06-21 22:05:07,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 246 transitions, 3530 flow [2024-06-21 22:05:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:05:07,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 22:05:07,625 INFO L175 Difference]: Start difference. First operand has 169 places, 219 transitions, 2740 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:05:07,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 246 transitions, 3530 flow [2024-06-21 22:05:07,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 246 transitions, 3310 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:07,781 INFO L231 Difference]: Finished difference. Result has 172 places, 225 transitions, 2768 flow [2024-06-21 22:05:07,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2768, PETRI_PLACES=172, PETRI_TRANSITIONS=225} [2024-06-21 22:05:07,782 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 22:05:07,782 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 225 transitions, 2768 flow [2024-06-21 22:05:07,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:07,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:07,783 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 22:05:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:05:07,783 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:07,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1687874028, now seen corresponding path program 6 times [2024-06-21 22:05:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320152765] [2024-06-21 22:05:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:10,676 INFO 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 22:05:10,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:10,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320152765] [2024-06-21 22:05:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320152765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:10,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:10,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:10,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017256128] [2024-06-21 22:05:10,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:10,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:10,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:10,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:10,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 225 transitions, 2768 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:10,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:10,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:10,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:11,736 INFO L124 PetriNetUnfolderBase]: 1959/3157 cut-off events. [2024-06-21 22:05:11,736 INFO L125 PetriNetUnfolderBase]: For 214347/214347 co-relation queries the response was YES. [2024-06-21 22:05:11,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30042 conditions, 3157 events. 1959/3157 cut-off events. For 214347/214347 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17435 event pairs, 564 based on Foata normal form. 2/3157 useless extension candidates. Maximal degree in co-relation 29962. Up to 3012 conditions per place. [2024-06-21 22:05:11,764 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 220 selfloop transitions, 18 changer transitions 0/243 dead transitions. [2024-06-21 22:05:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 243 transitions, 3308 flow [2024-06-21 22:05:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 22:05:11,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-21 22:05:11,766 INFO L175 Difference]: Start difference. First operand has 172 places, 225 transitions, 2768 flow. Second operand 8 states and 125 transitions. [2024-06-21 22:05:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 243 transitions, 3308 flow [2024-06-21 22:05:11,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 243 transitions, 3156 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:11,921 INFO L231 Difference]: Finished difference. Result has 175 places, 225 transitions, 2659 flow [2024-06-21 22:05:11,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2659, PETRI_PLACES=175, PETRI_TRANSITIONS=225} [2024-06-21 22:05:11,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-21 22:05:11,921 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 225 transitions, 2659 flow [2024-06-21 22:05:11,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:11,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:11,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:11,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:05:11,922 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:11,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1665537122, now seen corresponding path program 4 times [2024-06-21 22:05:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:11,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606939923] [2024-06-21 22:05:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606939923] [2024-06-21 22:05:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606939923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:14,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656759986] [2024-06-21 22:05:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:14,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:14,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:14,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 225 transitions, 2659 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:14,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:14,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:15,632 INFO L124 PetriNetUnfolderBase]: 2040/3293 cut-off events. [2024-06-21 22:05:15,632 INFO L125 PetriNetUnfolderBase]: For 231145/231145 co-relation queries the response was YES. [2024-06-21 22:05:15,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31462 conditions, 3293 events. 2040/3293 cut-off events. For 231145/231145 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18405 event pairs, 440 based on Foata normal form. 2/3288 useless extension candidates. Maximal degree in co-relation 31381. Up to 2411 conditions per place. [2024-06-21 22:05:15,657 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 143 selfloop transitions, 125 changer transitions 0/273 dead transitions. [2024-06-21 22:05:15,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 3846 flow [2024-06-21 22:05:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 22:05:15,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 22:05:15,659 INFO L175 Difference]: Start difference. First operand has 175 places, 225 transitions, 2659 flow. Second operand 8 states and 143 transitions. [2024-06-21 22:05:15,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 3846 flow [2024-06-21 22:05:15,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 273 transitions, 3764 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:15,834 INFO L231 Difference]: Finished difference. Result has 176 places, 245 transitions, 3372 flow [2024-06-21 22:05:15,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3372, PETRI_PLACES=176, PETRI_TRANSITIONS=245} [2024-06-21 22:05:15,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-21 22:05:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 245 transitions, 3372 flow [2024-06-21 22:05:15,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:15,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:15,835 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 22:05:15,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:05:15,835 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:15,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash 112572908, now seen corresponding path program 7 times [2024-06-21 22:05:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:15,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476813349] [2024-06-21 22:05:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:15,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:18,511 INFO 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 22:05:18,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:18,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476813349] [2024-06-21 22:05:18,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476813349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:18,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:18,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:18,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276831746] [2024-06-21 22:05:18,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:18,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:18,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:18,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:18,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 245 transitions, 3372 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:18,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:18,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:18,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:20,111 INFO L124 PetriNetUnfolderBase]: 2101/3402 cut-off events. [2024-06-21 22:05:20,112 INFO L125 PetriNetUnfolderBase]: For 265024/265024 co-relation queries the response was YES. [2024-06-21 22:05:20,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34685 conditions, 3402 events. 2101/3402 cut-off events. For 265024/265024 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19270 event pairs, 357 based on Foata normal form. 11/3411 useless extension candidates. Maximal degree in co-relation 34602. Up to 2577 conditions per place. [2024-06-21 22:05:20,141 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 178 selfloop transitions, 103 changer transitions 0/286 dead transitions. [2024-06-21 22:05:20,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 286 transitions, 4474 flow [2024-06-21 22:05:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:05:20,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-21 22:05:20,143 INFO L175 Difference]: Start difference. First operand has 176 places, 245 transitions, 3372 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:05:20,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 286 transitions, 4474 flow [2024-06-21 22:05:20,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 286 transitions, 4349 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:20,349 INFO L231 Difference]: Finished difference. Result has 184 places, 259 transitions, 3975 flow [2024-06-21 22:05:20,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3975, PETRI_PLACES=184, PETRI_TRANSITIONS=259} [2024-06-21 22:05:20,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-21 22:05:20,350 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 259 transitions, 3975 flow [2024-06-21 22:05:20,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:20,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:20,351 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 22:05:20,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:05:20,351 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:20,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash 112127438, now seen corresponding path program 8 times [2024-06-21 22:05:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:20,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545898609] [2024-06-21 22:05:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:22,835 INFO 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 22:05:22,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:22,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545898609] [2024-06-21 22:05:22,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545898609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:22,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:22,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:22,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096306467] [2024-06-21 22:05:22,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:22,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:22,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 259 transitions, 3975 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:22,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:22,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:22,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:24,069 INFO L124 PetriNetUnfolderBase]: 2151/3471 cut-off events. [2024-06-21 22:05:24,069 INFO L125 PetriNetUnfolderBase]: For 287391/287391 co-relation queries the response was YES. [2024-06-21 22:05:24,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37588 conditions, 3471 events. 2151/3471 cut-off events. For 287391/287391 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19662 event pairs, 585 based on Foata normal form. 4/3464 useless extension candidates. Maximal degree in co-relation 37501. Up to 3031 conditions per place. [2024-06-21 22:05:24,101 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 232 selfloop transitions, 65 changer transitions 0/302 dead transitions. [2024-06-21 22:05:24,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 302 transitions, 5486 flow [2024-06-21 22:05:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:05:24,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 22:05:24,103 INFO L175 Difference]: Start difference. First operand has 184 places, 259 transitions, 3975 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:05:24,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 302 transitions, 5486 flow [2024-06-21 22:05:24,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 302 transitions, 5387 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:24,346 INFO L231 Difference]: Finished difference. Result has 190 places, 271 transitions, 4489 flow [2024-06-21 22:05:24,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=190, PETRI_TRANSITIONS=271} [2024-06-21 22:05:24,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-21 22:05:24,346 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 271 transitions, 4489 flow [2024-06-21 22:05:24,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:24,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:24,347 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 22:05:24,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:05:24,347 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:24,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash 944966660, now seen corresponding path program 9 times [2024-06-21 22:05:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010420647] [2024-06-21 22:05:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:26,635 INFO 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 22:05:26,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:26,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010420647] [2024-06-21 22:05:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010420647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504304604] [2024-06-21 22:05:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:26,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:26,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 271 transitions, 4489 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:26,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:26,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:26,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:28,198 INFO L124 PetriNetUnfolderBase]: 2219/3580 cut-off events. [2024-06-21 22:05:28,198 INFO L125 PetriNetUnfolderBase]: For 321356/321356 co-relation queries the response was YES. [2024-06-21 22:05:28,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39950 conditions, 3580 events. 2219/3580 cut-off events. For 321356/321356 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20537 event pairs, 375 based on Foata normal form. 9/3578 useless extension candidates. Maximal degree in co-relation 39860. Up to 2600 conditions per place. [2024-06-21 22:05:28,233 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 188 selfloop transitions, 121 changer transitions 0/314 dead transitions. [2024-06-21 22:05:28,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 314 transitions, 5758 flow [2024-06-21 22:05:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:05:28,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-21 22:05:28,234 INFO L175 Difference]: Start difference. First operand has 190 places, 271 transitions, 4489 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:05:28,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 314 transitions, 5758 flow [2024-06-21 22:05:28,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 314 transitions, 5655 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-21 22:05:28,543 INFO L231 Difference]: Finished difference. Result has 199 places, 284 transitions, 5188 flow [2024-06-21 22:05:28,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5188, PETRI_PLACES=199, PETRI_TRANSITIONS=284} [2024-06-21 22:05:28,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-21 22:05:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 284 transitions, 5188 flow [2024-06-21 22:05:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:28,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:28,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:28,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:05:28,544 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:28,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash 340474058, now seen corresponding path program 10 times [2024-06-21 22:05:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:28,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196983465] [2024-06-21 22:05:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:28,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:30,900 INFO 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 22:05:30,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196983465] [2024-06-21 22:05:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196983465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:30,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422790281] [2024-06-21 22:05:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:30,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:30,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 284 transitions, 5188 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:30,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:30,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:30,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:32,839 INFO L124 PetriNetUnfolderBase]: 2295/3729 cut-off events. [2024-06-21 22:05:32,839 INFO L125 PetriNetUnfolderBase]: For 360352/360352 co-relation queries the response was YES. [2024-06-21 22:05:32,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43755 conditions, 3729 events. 2295/3729 cut-off events. For 360352/360352 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21733 event pairs, 362 based on Foata normal form. 17/3744 useless extension candidates. Maximal degree in co-relation 43661. Up to 2750 conditions per place. [2024-06-21 22:05:32,875 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 210 selfloop transitions, 128 changer transitions 0/343 dead transitions. [2024-06-21 22:05:32,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 343 transitions, 6896 flow [2024-06-21 22:05:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 22:05:32,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-21 22:05:32,876 INFO L175 Difference]: Start difference. First operand has 199 places, 284 transitions, 5188 flow. Second operand 10 states and 174 transitions. [2024-06-21 22:05:32,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 343 transitions, 6896 flow [2024-06-21 22:05:33,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 343 transitions, 6732 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:33,231 INFO L231 Difference]: Finished difference. Result has 208 places, 305 transitions, 6083 flow [2024-06-21 22:05:33,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6083, PETRI_PLACES=208, PETRI_TRANSITIONS=305} [2024-06-21 22:05:33,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-21 22:05:33,232 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 305 transitions, 6083 flow [2024-06-21 22:05:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:33,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:33,233 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 22:05:33,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:05:33,233 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:33,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1373293970, now seen corresponding path program 11 times [2024-06-21 22:05:33,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:33,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355168718] [2024-06-21 22:05:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:35,479 INFO 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 22:05:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355168718] [2024-06-21 22:05:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355168718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:35,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:35,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:35,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530538552] [2024-06-21 22:05:35,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:35,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:35,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:35,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:35,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 305 transitions, 6083 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:35,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:35,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:35,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:36,873 INFO L124 PetriNetUnfolderBase]: 2287/3702 cut-off events. [2024-06-21 22:05:36,873 INFO L125 PetriNetUnfolderBase]: For 381211/381211 co-relation queries the response was YES. [2024-06-21 22:05:36,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45682 conditions, 3702 events. 2287/3702 cut-off events. For 381211/381211 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21345 event pairs, 593 based on Foata normal form. 4/3704 useless extension candidates. Maximal degree in co-relation 45582. Up to 3524 conditions per place. [2024-06-21 22:05:36,913 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 302 selfloop transitions, 16 changer transitions 0/323 dead transitions. [2024-06-21 22:05:36,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 323 transitions, 6879 flow [2024-06-21 22:05:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 22:05:36,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-21 22:05:36,915 INFO L175 Difference]: Start difference. First operand has 208 places, 305 transitions, 6083 flow. Second operand 8 states and 121 transitions. [2024-06-21 22:05:36,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 323 transitions, 6879 flow [2024-06-21 22:05:37,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 323 transitions, 6800 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:37,410 INFO L231 Difference]: Finished difference. Result has 212 places, 306 transitions, 6073 flow [2024-06-21 22:05:37,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6073, PETRI_PLACES=212, PETRI_TRANSITIONS=306} [2024-06-21 22:05:37,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-21 22:05:37,410 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 306 transitions, 6073 flow [2024-06-21 22:05:37,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:37,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:37,411 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 22:05:37,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:05:37,411 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:37,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash -94526002, now seen corresponding path program 12 times [2024-06-21 22:05:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:37,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356444881] [2024-06-21 22:05:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:37,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:39,879 INFO 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 22:05:39,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356444881] [2024-06-21 22:05:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356444881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:39,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860821062] [2024-06-21 22:05:39,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:39,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:39,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:39,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 306 transitions, 6073 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:39,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:39,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:39,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:41,359 INFO L124 PetriNetUnfolderBase]: 2288/3694 cut-off events. [2024-06-21 22:05:41,360 INFO L125 PetriNetUnfolderBase]: For 391189/391189 co-relation queries the response was YES. [2024-06-21 22:05:41,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45866 conditions, 3694 events. 2288/3694 cut-off events. For 391189/391189 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21281 event pairs, 597 based on Foata normal form. 5/3688 useless extension candidates. Maximal degree in co-relation 45763. Up to 3325 conditions per place. [2024-06-21 22:05:41,397 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 62 changer transitions 0/338 dead transitions. [2024-06-21 22:05:41,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 338 transitions, 7445 flow [2024-06-21 22:05:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:05:41,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 22:05:41,399 INFO L175 Difference]: Start difference. First operand has 212 places, 306 transitions, 6073 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:05:41,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 338 transitions, 7445 flow [2024-06-21 22:05:41,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 338 transitions, 7398 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:41,781 INFO L231 Difference]: Finished difference. Result has 216 places, 313 transitions, 6470 flow [2024-06-21 22:05:41,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6026, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6470, PETRI_PLACES=216, PETRI_TRANSITIONS=313} [2024-06-21 22:05:41,782 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-21 22:05:41,782 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 313 transitions, 6470 flow [2024-06-21 22:05:41,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:41,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:41,782 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 22:05:41,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:05:41,782 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:41,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 333816746, now seen corresponding path program 2 times [2024-06-21 22:05:41,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:41,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058749326] [2024-06-21 22:05:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:41,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:44,905 INFO 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 22:05:44,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:44,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058749326] [2024-06-21 22:05:44,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058749326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:44,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:44,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:44,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142869663] [2024-06-21 22:05:44,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:44,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:44,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 313 transitions, 6470 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:44,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:44,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:44,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:46,493 INFO L124 PetriNetUnfolderBase]: 2332/3780 cut-off events. [2024-06-21 22:05:46,493 INFO L125 PetriNetUnfolderBase]: For 421846/421846 co-relation queries the response was YES. [2024-06-21 22:05:46,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47458 conditions, 3780 events. 2332/3780 cut-off events. For 421846/421846 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21937 event pairs, 595 based on Foata normal form. 12/3790 useless extension candidates. Maximal degree in co-relation 47353. Up to 3540 conditions per place. [2024-06-21 22:05:46,532 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 309 selfloop transitions, 20 changer transitions 0/334 dead transitions. [2024-06-21 22:05:46,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 334 transitions, 7362 flow [2024-06-21 22:05:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:05:46,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-21 22:05:46,534 INFO L175 Difference]: Start difference. First operand has 216 places, 313 transitions, 6470 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:05:46,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 334 transitions, 7362 flow [2024-06-21 22:05:47,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 334 transitions, 7175 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:47,019 INFO L231 Difference]: Finished difference. Result has 219 places, 314 transitions, 6373 flow [2024-06-21 22:05:47,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6373, PETRI_PLACES=219, PETRI_TRANSITIONS=314} [2024-06-21 22:05:47,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 22:05:47,020 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 314 transitions, 6373 flow [2024-06-21 22:05:47,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:47,021 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 22:05:47,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:05:47,021 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:47,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash 349053866, now seen corresponding path program 3 times [2024-06-21 22:05:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:47,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840252709] [2024-06-21 22:05:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:49,953 INFO 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 22:05:49,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840252709] [2024-06-21 22:05:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840252709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:49,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:49,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503166612] [2024-06-21 22:05:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:49,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:49,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:49,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:49,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 314 transitions, 6373 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:49,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:49,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:49,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:51,446 INFO L124 PetriNetUnfolderBase]: 2360/3828 cut-off events. [2024-06-21 22:05:51,447 INFO L125 PetriNetUnfolderBase]: For 433117/433117 co-relation queries the response was YES. [2024-06-21 22:05:51,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48104 conditions, 3828 events. 2360/3828 cut-off events. For 433117/433117 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22219 event pairs, 593 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 47998. Up to 3546 conditions per place. [2024-06-21 22:05:51,489 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 312 selfloop transitions, 23 changer transitions 0/340 dead transitions. [2024-06-21 22:05:51,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 340 transitions, 7361 flow [2024-06-21 22:05:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:05:51,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-21 22:05:51,491 INFO L175 Difference]: Start difference. First operand has 219 places, 314 transitions, 6373 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:05:51,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 340 transitions, 7361 flow [2024-06-21 22:05:52,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 340 transitions, 7325 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:52,009 INFO L231 Difference]: Finished difference. Result has 223 places, 315 transitions, 6433 flow [2024-06-21 22:05:52,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6433, PETRI_PLACES=223, PETRI_TRANSITIONS=315} [2024-06-21 22:05:52,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-21 22:05:52,010 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 315 transitions, 6433 flow [2024-06-21 22:05:52,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:52,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:52,011 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 22:05:52,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:05:52,011 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:52,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash -94279924, now seen corresponding path program 4 times [2024-06-21 22:05:52,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:52,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952729036] [2024-06-21 22:05:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:52,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:55,192 INFO 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 22:05:55,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:55,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952729036] [2024-06-21 22:05:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952729036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:55,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64595971] [2024-06-21 22:05:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:55,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:55,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:05:55,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 315 transitions, 6433 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:55,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:55,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:05:55,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:57,014 INFO L124 PetriNetUnfolderBase]: 2378/3846 cut-off events. [2024-06-21 22:05:57,014 INFO L125 PetriNetUnfolderBase]: For 449689/449689 co-relation queries the response was YES. [2024-06-21 22:05:57,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48503 conditions, 3846 events. 2378/3846 cut-off events. For 449689/449689 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22344 event pairs, 607 based on Foata normal form. 12/3847 useless extension candidates. Maximal degree in co-relation 48396. Up to 3504 conditions per place. [2024-06-21 22:05:57,061 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 289 selfloop transitions, 43 changer transitions 0/337 dead transitions. [2024-06-21 22:05:57,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 337 transitions, 7381 flow [2024-06-21 22:05:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:05:57,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 22:05:57,062 INFO L175 Difference]: Start difference. First operand has 223 places, 315 transitions, 6433 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:05:57,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 337 transitions, 7381 flow [2024-06-21 22:05:57,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 337 transitions, 7325 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:57,678 INFO L231 Difference]: Finished difference. Result has 224 places, 316 transitions, 6517 flow [2024-06-21 22:05:57,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6517, PETRI_PLACES=224, PETRI_TRANSITIONS=316} [2024-06-21 22:05:57,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-21 22:05:57,679 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 316 transitions, 6517 flow [2024-06-21 22:05:57,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:57,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:57,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:57,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:05:57,679 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:57,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:57,680 INFO L85 PathProgramCache]: Analyzing trace with hash -104778020, now seen corresponding path program 1 times [2024-06-21 22:05:57,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:57,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791200037] [2024-06-21 22:05:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:01,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:01,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791200037] [2024-06-21 22:06:01,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791200037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:01,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:01,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434737249] [2024-06-21 22:06:01,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 22:06:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 316 transitions, 6517 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:01,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:01,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 22:06:01,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:02,793 INFO L124 PetriNetUnfolderBase]: 2291/3771 cut-off events. [2024-06-21 22:06:02,794 INFO L125 PetriNetUnfolderBase]: For 458940/458985 co-relation queries the response was YES. [2024-06-21 22:06:02,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47748 conditions, 3771 events. 2291/3771 cut-off events. For 458940/458985 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22418 event pairs, 591 based on Foata normal form. 16/3779 useless extension candidates. Maximal degree in co-relation 47640. Up to 3367 conditions per place. [2024-06-21 22:06:02,835 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 31 changer transitions 0/349 dead transitions. [2024-06-21 22:06:02,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 349 transitions, 7576 flow [2024-06-21 22:06:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:06:02,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-21 22:06:02,837 INFO L175 Difference]: Start difference. First operand has 224 places, 316 transitions, 6517 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:06:02,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 349 transitions, 7576 flow [2024-06-21 22:06:03,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 349 transitions, 7488 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:03,303 INFO L231 Difference]: Finished difference. Result has 230 places, 323 transitions, 6706 flow [2024-06-21 22:06:03,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6429, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6706, PETRI_PLACES=230, PETRI_TRANSITIONS=323} [2024-06-21 22:06:03,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 22:06:03,304 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 323 transitions, 6706 flow [2024-06-21 22:06:03,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:03,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:03,304 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 22:06:03,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:06:03,304 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:03,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash -104593322, now seen corresponding path program 1 times [2024-06-21 22:06:03,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:03,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079292285] [2024-06-21 22:06:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:08,023 INFO 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 22:06:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079292285] [2024-06-21 22:06:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079292285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:08,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:08,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677052811] [2024-06-21 22:06:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:08,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:08,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:08,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:08,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 323 transitions, 6706 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:08,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:08,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:08,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:09,456 INFO L124 PetriNetUnfolderBase]: 2387/3877 cut-off events. [2024-06-21 22:06:09,456 INFO L125 PetriNetUnfolderBase]: For 465346/465346 co-relation queries the response was YES. [2024-06-21 22:06:09,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49201 conditions, 3877 events. 2387/3877 cut-off events. For 465346/465346 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22642 event pairs, 600 based on Foata normal form. 2/3877 useless extension candidates. Maximal degree in co-relation 49090. Up to 3686 conditions per place. [2024-06-21 22:06:09,497 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 17 changer transitions 0/343 dead transitions. [2024-06-21 22:06:09,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 343 transitions, 7508 flow [2024-06-21 22:06:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 22:06:09,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-21 22:06:09,499 INFO L175 Difference]: Start difference. First operand has 230 places, 323 transitions, 6706 flow. Second operand 8 states and 124 transitions. [2024-06-21 22:06:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 343 transitions, 7508 flow [2024-06-21 22:06:10,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 343 transitions, 7435 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:10,009 INFO L231 Difference]: Finished difference. Result has 234 places, 325 transitions, 6748 flow [2024-06-21 22:06:10,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6748, PETRI_PLACES=234, PETRI_TRANSITIONS=325} [2024-06-21 22:06:10,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 22:06:10,010 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 325 transitions, 6748 flow [2024-06-21 22:06:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:10,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:06:10,011 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:10,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -104593570, now seen corresponding path program 1 times [2024-06-21 22:06:10,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:10,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638209225] [2024-06-21 22:06:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:13,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:13,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638209225] [2024-06-21 22:06:13,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638209225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:13,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:13,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:13,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989637200] [2024-06-21 22:06:13,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:13,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:13,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:13,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:13,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 325 transitions, 6748 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:13,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:13,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:13,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:14,716 INFO L124 PetriNetUnfolderBase]: 2382/3866 cut-off events. [2024-06-21 22:06:14,717 INFO L125 PetriNetUnfolderBase]: For 472116/472116 co-relation queries the response was YES. [2024-06-21 22:06:14,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49283 conditions, 3866 events. 2382/3866 cut-off events. For 472116/472116 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22552 event pairs, 598 based on Foata normal form. 1/3865 useless extension candidates. Maximal degree in co-relation 49170. Up to 3672 conditions per place. [2024-06-21 22:06:14,759 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 320 selfloop transitions, 23 changer transitions 0/348 dead transitions. [2024-06-21 22:06:14,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 7603 flow [2024-06-21 22:06:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 22:06:14,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-21 22:06:14,761 INFO L175 Difference]: Start difference. First operand has 234 places, 325 transitions, 6748 flow. Second operand 8 states and 125 transitions. [2024-06-21 22:06:14,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 7603 flow [2024-06-21 22:06:15,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 348 transitions, 7508 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:15,357 INFO L231 Difference]: Finished difference. Result has 236 places, 330 transitions, 6810 flow [2024-06-21 22:06:15,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6653, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6810, PETRI_PLACES=236, PETRI_TRANSITIONS=330} [2024-06-21 22:06:15,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-21 22:06:15,357 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 330 transitions, 6810 flow [2024-06-21 22:06:15,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:15,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:15,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:15,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:06:15,358 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:15,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 112588780, now seen corresponding path program 2 times [2024-06-21 22:06:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365981114] [2024-06-21 22:06:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:18,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:18,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365981114] [2024-06-21 22:06:18,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365981114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:18,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:18,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323702446] [2024-06-21 22:06:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:18,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:18,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:18,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 330 transitions, 6810 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:18,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:18,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:18,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:19,496 INFO L124 PetriNetUnfolderBase]: 2377/3859 cut-off events. [2024-06-21 22:06:19,496 INFO L125 PetriNetUnfolderBase]: For 484431/484431 co-relation queries the response was YES. [2024-06-21 22:06:19,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49304 conditions, 3859 events. 2377/3859 cut-off events. For 484431/484431 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22521 event pairs, 601 based on Foata normal form. 2/3859 useless extension candidates. Maximal degree in co-relation 49190. Up to 3667 conditions per place. [2024-06-21 22:06:19,541 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 321 selfloop transitions, 19 changer transitions 0/345 dead transitions. [2024-06-21 22:06:19,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 345 transitions, 7548 flow [2024-06-21 22:06:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 22:06:19,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-21 22:06:19,542 INFO L175 Difference]: Start difference. First operand has 236 places, 330 transitions, 6810 flow. Second operand 8 states and 122 transitions. [2024-06-21 22:06:19,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 345 transitions, 7548 flow [2024-06-21 22:06:20,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 345 transitions, 7486 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:20,133 INFO L231 Difference]: Finished difference. Result has 237 places, 330 transitions, 6791 flow [2024-06-21 22:06:20,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6791, PETRI_PLACES=237, PETRI_TRANSITIONS=330} [2024-06-21 22:06:20,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-21 22:06:20,134 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 330 transitions, 6791 flow [2024-06-21 22:06:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:20,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:20,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:06:20,135 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 340489930, now seen corresponding path program 3 times [2024-06-21 22:06:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678284567] [2024-06-21 22:06:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:23,553 INFO 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 22:06:23,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678284567] [2024-06-21 22:06:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678284567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:23,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:23,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61512611] [2024-06-21 22:06:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:23,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:23,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 330 transitions, 6791 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:23,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:23,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:25,269 INFO L124 PetriNetUnfolderBase]: 2372/3865 cut-off events. [2024-06-21 22:06:25,269 INFO L125 PetriNetUnfolderBase]: For 503708/503708 co-relation queries the response was YES. [2024-06-21 22:06:25,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49348 conditions, 3865 events. 2372/3865 cut-off events. For 503708/503708 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22666 event pairs, 377 based on Foata normal form. 8/3871 useless extension candidates. Maximal degree in co-relation 49233. Up to 2966 conditions per place. [2024-06-21 22:06:25,312 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 226 selfloop transitions, 125 changer transitions 0/356 dead transitions. [2024-06-21 22:06:25,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 356 transitions, 7723 flow [2024-06-21 22:06:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 22:06:25,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-21 22:06:25,313 INFO L175 Difference]: Start difference. First operand has 237 places, 330 transitions, 6791 flow. Second operand 9 states and 146 transitions. [2024-06-21 22:06:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 356 transitions, 7723 flow [2024-06-21 22:06:25,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 356 transitions, 7518 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:25,747 INFO L231 Difference]: Finished difference. Result has 238 places, 331 transitions, 6962 flow [2024-06-21 22:06:25,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6554, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6962, PETRI_PLACES=238, PETRI_TRANSITIONS=331} [2024-06-21 22:06:25,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-21 22:06:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 331 transitions, 6962 flow [2024-06-21 22:06:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:25,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:25,752 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 22:06:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:06:25,752 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:25,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash 349060810, now seen corresponding path program 4 times [2024-06-21 22:06:25,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:25,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991201075] [2024-06-21 22:06:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:28,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991201075] [2024-06-21 22:06:28,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991201075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:28,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:28,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304749751] [2024-06-21 22:06:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:28,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:28,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:28,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:28,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 331 transitions, 6962 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:28,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:28,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:28,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:29,949 INFO L124 PetriNetUnfolderBase]: 2369/3853 cut-off events. [2024-06-21 22:06:29,949 INFO L125 PetriNetUnfolderBase]: For 516638/516638 co-relation queries the response was YES. [2024-06-21 22:06:29,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50157 conditions, 3853 events. 2369/3853 cut-off events. For 516638/516638 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22435 event pairs, 580 based on Foata normal form. 2/3853 useless extension candidates. Maximal degree in co-relation 50042. Up to 3663 conditions per place. [2024-06-21 22:06:29,990 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 326 selfloop transitions, 16 changer transitions 0/347 dead transitions. [2024-06-21 22:06:29,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 347 transitions, 7719 flow [2024-06-21 22:06:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 22:06:29,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-21 22:06:29,992 INFO L175 Difference]: Start difference. First operand has 238 places, 331 transitions, 6962 flow. Second operand 8 states and 120 transitions. [2024-06-21 22:06:29,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 347 transitions, 7719 flow [2024-06-21 22:06:30,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 347 transitions, 7546 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:30,479 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 6858 flow [2024-06-21 22:06:30,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6858, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-06-21 22:06:30,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-21 22:06:30,480 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 6858 flow [2024-06-21 22:06:30,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:30,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:30,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:30,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:06:30,481 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:30,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash -260526625, now seen corresponding path program 1 times [2024-06-21 22:06:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954061315] [2024-06-21 22:06:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:33,398 INFO 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 22:06:33,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954061315] [2024-06-21 22:06:33,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954061315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:33,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:33,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966083864] [2024-06-21 22:06:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:33,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:33,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:33,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 6858 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:33,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:33,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:33,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:35,103 INFO L124 PetriNetUnfolderBase]: 2377/3874 cut-off events. [2024-06-21 22:06:35,103 INFO L125 PetriNetUnfolderBase]: For 529819/529819 co-relation queries the response was YES. [2024-06-21 22:06:35,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50176 conditions, 3874 events. 2377/3874 cut-off events. For 529819/529819 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22601 event pairs, 421 based on Foata normal form. 2/3874 useless extension candidates. Maximal degree in co-relation 50061. Up to 3526 conditions per place. [2024-06-21 22:06:35,146 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 336 selfloop transitions, 34 changer transitions 0/375 dead transitions. [2024-06-21 22:06:35,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 375 transitions, 8077 flow [2024-06-21 22:06:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:06:35,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 22:06:35,148 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 6858 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:06:35,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 375 transitions, 8077 flow [2024-06-21 22:06:35,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 375 transitions, 8036 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:35,743 INFO L231 Difference]: Finished difference. Result has 243 places, 341 transitions, 7171 flow [2024-06-21 22:06:35,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6817, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7171, PETRI_PLACES=243, PETRI_TRANSITIONS=341} [2024-06-21 22:06:35,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-21 22:06:35,745 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 341 transitions, 7171 flow [2024-06-21 22:06:35,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:35,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:35,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:35,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:06:35,746 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:35,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1483603721, now seen corresponding path program 2 times [2024-06-21 22:06:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805257658] [2024-06-21 22:06:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:38,632 INFO 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 22:06:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805257658] [2024-06-21 22:06:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805257658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:38,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010247695] [2024-06-21 22:06:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:38,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:38,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:38,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:38,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 341 transitions, 7171 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:38,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:38,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:38,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:40,299 INFO L124 PetriNetUnfolderBase]: 2390/3891 cut-off events. [2024-06-21 22:06:40,299 INFO L125 PetriNetUnfolderBase]: For 549077/549077 co-relation queries the response was YES. [2024-06-21 22:06:40,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51005 conditions, 3891 events. 2390/3891 cut-off events. For 549077/549077 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22707 event pairs, 572 based on Foata normal form. 2/3891 useless extension candidates. Maximal degree in co-relation 50888. Up to 3629 conditions per place. [2024-06-21 22:06:40,346 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 336 selfloop transitions, 33 changer transitions 0/374 dead transitions. [2024-06-21 22:06:40,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 8132 flow [2024-06-21 22:06:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:06:40,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 22:06:40,356 INFO L175 Difference]: Start difference. First operand has 243 places, 341 transitions, 7171 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:06:40,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 8132 flow [2024-06-21 22:06:41,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 374 transitions, 8032 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 22:06:41,109 INFO L231 Difference]: Finished difference. Result has 249 places, 346 transitions, 7285 flow [2024-06-21 22:06:41,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7085, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7285, PETRI_PLACES=249, PETRI_TRANSITIONS=346} [2024-06-21 22:06:41,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 22:06:41,110 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 346 transitions, 7285 flow [2024-06-21 22:06:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:41,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:41,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:41,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:06:41,110 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:41,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1874978969, now seen corresponding path program 1 times [2024-06-21 22:06:41,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:41,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501598216] [2024-06-21 22:06:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:41,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:43,691 INFO 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 22:06:43,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501598216] [2024-06-21 22:06:43,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501598216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:43,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:43,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:43,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735307654] [2024-06-21 22:06:43,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:43,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:43,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:43,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:43,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:43,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:43,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 346 transitions, 7285 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:43,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:43,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:43,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:45,206 INFO L124 PetriNetUnfolderBase]: 2395/3900 cut-off events. [2024-06-21 22:06:45,206 INFO L125 PetriNetUnfolderBase]: For 563588/563588 co-relation queries the response was YES. [2024-06-21 22:06:45,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51345 conditions, 3900 events. 2395/3900 cut-off events. For 563588/563588 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22792 event pairs, 563 based on Foata normal form. 1/3899 useless extension candidates. Maximal degree in co-relation 51226. Up to 3637 conditions per place. [2024-06-21 22:06:45,254 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 24 changer transitions 0/380 dead transitions. [2024-06-21 22:06:45,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 380 transitions, 8258 flow [2024-06-21 22:06:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:06:45,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 22:06:45,255 INFO L175 Difference]: Start difference. First operand has 249 places, 346 transitions, 7285 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:06:45,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 380 transitions, 8258 flow [2024-06-21 22:06:46,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 380 transitions, 8178 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:46,008 INFO L231 Difference]: Finished difference. Result has 253 places, 349 transitions, 7393 flow [2024-06-21 22:06:46,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7205, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7393, PETRI_PLACES=253, PETRI_TRANSITIONS=349} [2024-06-21 22:06:46,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-21 22:06:46,009 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 349 transitions, 7393 flow [2024-06-21 22:06:46,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:46,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:46,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:46,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:06:46,010 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:46,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:46,010 INFO L85 PathProgramCache]: Analyzing trace with hash -6563593, now seen corresponding path program 3 times [2024-06-21 22:06:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:46,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254330724] [2024-06-21 22:06:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:46,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:48,621 INFO 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 22:06:48,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:48,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254330724] [2024-06-21 22:06:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254330724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:48,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:48,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227283243] [2024-06-21 22:06:48,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:48,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:48,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:48,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:48,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 349 transitions, 7393 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:48,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:48,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:48,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:50,286 INFO L124 PetriNetUnfolderBase]: 2403/3913 cut-off events. [2024-06-21 22:06:50,286 INFO L125 PetriNetUnfolderBase]: For 583661/583661 co-relation queries the response was YES. [2024-06-21 22:06:50,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51929 conditions, 3913 events. 2403/3913 cut-off events. For 583661/583661 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22920 event pairs, 578 based on Foata normal form. 2/3913 useless extension candidates. Maximal degree in co-relation 51809. Up to 3648 conditions per place. [2024-06-21 22:06:50,334 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 33 changer transitions 0/373 dead transitions. [2024-06-21 22:06:50,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 373 transitions, 8264 flow [2024-06-21 22:06:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:06:50,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 22:06:50,336 INFO L175 Difference]: Start difference. First operand has 253 places, 349 transitions, 7393 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:06:50,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 373 transitions, 8264 flow [2024-06-21 22:06:51,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 373 transitions, 8133 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:51,168 INFO L231 Difference]: Finished difference. Result has 257 places, 352 transitions, 7422 flow [2024-06-21 22:06:51,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7422, PETRI_PLACES=257, PETRI_TRANSITIONS=352} [2024-06-21 22:06:51,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 22:06:51,168 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 352 transitions, 7422 flow [2024-06-21 22:06:51,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:51,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:51,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:51,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:06:51,169 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:51,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1197908841, now seen corresponding path program 2 times [2024-06-21 22:06:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:51,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294838422] [2024-06-21 22:06:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:53,967 INFO 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 22:06:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:53,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294838422] [2024-06-21 22:06:53,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294838422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:53,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:53,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:53,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832979617] [2024-06-21 22:06:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:53,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:53,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:53,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:53,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 352 transitions, 7422 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:53,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:53,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:53,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:55,594 INFO L124 PetriNetUnfolderBase]: 2408/3925 cut-off events. [2024-06-21 22:06:55,595 INFO L125 PetriNetUnfolderBase]: For 599220/599220 co-relation queries the response was YES. [2024-06-21 22:06:55,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52292 conditions, 3925 events. 2408/3925 cut-off events. For 599220/599220 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23026 event pairs, 571 based on Foata normal form. 1/3924 useless extension candidates. Maximal degree in co-relation 52170. Up to 3680 conditions per place. [2024-06-21 22:06:55,642 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 21 changer transitions 0/379 dead transitions. [2024-06-21 22:06:55,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 379 transitions, 8377 flow [2024-06-21 22:06:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:06:55,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-21 22:06:55,643 INFO L175 Difference]: Start difference. First operand has 257 places, 352 transitions, 7422 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:06:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 379 transitions, 8377 flow [2024-06-21 22:06:56,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 379 transitions, 8282 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:56,317 INFO L231 Difference]: Finished difference. Result has 260 places, 355 transitions, 7514 flow [2024-06-21 22:06:56,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7514, PETRI_PLACES=260, PETRI_TRANSITIONS=355} [2024-06-21 22:06:56,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 22:06:56,319 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 355 transitions, 7514 flow [2024-06-21 22:06:56,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:56,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:56,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:56,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:06:56,320 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:56,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 33746079, now seen corresponding path program 1 times [2024-06-21 22:06:56,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:56,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020519248] [2024-06-21 22:06:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:58,975 INFO 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 22:06:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020519248] [2024-06-21 22:06:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020519248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:58,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:58,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:58,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307058292] [2024-06-21 22:06:58,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:59,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:06:59,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 355 transitions, 7514 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:59,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:59,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:06:59,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:00,587 INFO L124 PetriNetUnfolderBase]: 2418/3940 cut-off events. [2024-06-21 22:07:00,587 INFO L125 PetriNetUnfolderBase]: For 618231/618231 co-relation queries the response was YES. [2024-06-21 22:07:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52874 conditions, 3940 events. 2418/3940 cut-off events. For 618231/618231 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23073 event pairs, 569 based on Foata normal form. 2/3939 useless extension candidates. Maximal degree in co-relation 52751. Up to 3663 conditions per place. [2024-06-21 22:07:00,632 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 350 selfloop transitions, 29 changer transitions 0/384 dead transitions. [2024-06-21 22:07:00,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 384 transitions, 8464 flow [2024-06-21 22:07:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:07:00,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-21 22:07:00,648 INFO L175 Difference]: Start difference. First operand has 260 places, 355 transitions, 7514 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:07:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 384 transitions, 8464 flow [2024-06-21 22:07:01,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 384 transitions, 8324 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:01,329 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 7563 flow [2024-06-21 22:07:01,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7563, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-21 22:07:01,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-21 22:07:01,330 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 7563 flow [2024-06-21 22:07:01,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:01,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:01,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:01,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:07:01,330 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:01,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash 33751814, now seen corresponding path program 1 times [2024-06-21 22:07:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:01,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659343014] [2024-06-21 22:07:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:01,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:03,858 INFO 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 22:07:03,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:03,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659343014] [2024-06-21 22:07:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659343014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:03,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:03,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:03,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75955532] [2024-06-21 22:07:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:03,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:03,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 7563 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:03,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:03,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:03,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:05,995 INFO L124 PetriNetUnfolderBase]: 2508/4076 cut-off events. [2024-06-21 22:07:05,995 INFO L125 PetriNetUnfolderBase]: For 656808/656808 co-relation queries the response was YES. [2024-06-21 22:07:06,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55358 conditions, 4076 events. 2508/4076 cut-off events. For 656808/656808 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23827 event pairs, 433 based on Foata normal form. 5/4079 useless extension candidates. Maximal degree in co-relation 55234. Up to 3004 conditions per place. [2024-06-21 22:07:06,047 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 266 selfloop transitions, 157 changer transitions 0/428 dead transitions. [2024-06-21 22:07:06,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 428 transitions, 9387 flow [2024-06-21 22:07:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:07:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:07:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 22:07:06,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39728682170542634 [2024-06-21 22:07:06,049 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 7563 flow. Second operand 12 states and 205 transitions. [2024-06-21 22:07:06,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 428 transitions, 9387 flow [2024-06-21 22:07:06,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 428 transitions, 9235 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:07,003 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 8384 flow [2024-06-21 22:07:07,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8384, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-21 22:07:07,004 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 22:07:07,004 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 8384 flow [2024-06-21 22:07:07,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:07,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:07,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:07,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:07:07,005 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:07,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash 33746234, now seen corresponding path program 2 times [2024-06-21 22:07:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:07,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536285562] [2024-06-21 22:07:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:09,570 INFO 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 22:07:09,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536285562] [2024-06-21 22:07:09,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536285562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:09,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:09,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110218482] [2024-06-21 22:07:09,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:09,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:09,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:09,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 8384 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:09,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:09,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:09,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:11,510 INFO L124 PetriNetUnfolderBase]: 2579/4177 cut-off events. [2024-06-21 22:07:11,511 INFO L125 PetriNetUnfolderBase]: For 714148/714148 co-relation queries the response was YES. [2024-06-21 22:07:11,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58791 conditions, 4177 events. 2579/4177 cut-off events. For 714148/714148 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24513 event pairs, 442 based on Foata normal form. 6/4181 useless extension candidates. Maximal degree in co-relation 58665. Up to 3012 conditions per place. [2024-06-21 22:07:11,563 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 254 selfloop transitions, 172 changer transitions 0/431 dead transitions. [2024-06-21 22:07:11,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 431 transitions, 9948 flow [2024-06-21 22:07:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:07:11,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 22:07:11,564 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 8384 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:07:11,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 431 transitions, 9948 flow [2024-06-21 22:07:12,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 431 transitions, 9782 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-21 22:07:12,424 INFO L231 Difference]: Finished difference. Result has 273 places, 392 transitions, 9079 flow [2024-06-21 22:07:12,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8218, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9079, PETRI_PLACES=273, PETRI_TRANSITIONS=392} [2024-06-21 22:07:12,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 22:07:12,425 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 392 transitions, 9079 flow [2024-06-21 22:07:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:12,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:12,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:12,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:07:12,425 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:12,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1359885791, now seen corresponding path program 4 times [2024-06-21 22:07:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557357153] [2024-06-21 22:07:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:15,451 INFO 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 22:07:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557357153] [2024-06-21 22:07:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557357153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:15,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723552562] [2024-06-21 22:07:15,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:15,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:15,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 392 transitions, 9079 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:15,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:15,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:15,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:17,403 INFO L124 PetriNetUnfolderBase]: 2574/4157 cut-off events. [2024-06-21 22:07:17,403 INFO L125 PetriNetUnfolderBase]: For 745918/745918 co-relation queries the response was YES. [2024-06-21 22:07:17,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60608 conditions, 4157 events. 2574/4157 cut-off events. For 745918/745918 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24356 event pairs, 591 based on Foata normal form. 2/4148 useless extension candidates. Maximal degree in co-relation 60480. Up to 3896 conditions per place. [2024-06-21 22:07:17,452 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 367 selfloop transitions, 33 changer transitions 0/405 dead transitions. [2024-06-21 22:07:17,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 405 transitions, 9913 flow [2024-06-21 22:07:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 22:07:17,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-21 22:07:17,453 INFO L175 Difference]: Start difference. First operand has 273 places, 392 transitions, 9079 flow. Second operand 8 states and 124 transitions. [2024-06-21 22:07:17,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 405 transitions, 9913 flow [2024-06-21 22:07:18,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 405 transitions, 9769 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:18,431 INFO L231 Difference]: Finished difference. Result has 276 places, 392 transitions, 9006 flow [2024-06-21 22:07:18,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8935, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9006, PETRI_PLACES=276, PETRI_TRANSITIONS=392} [2024-06-21 22:07:18,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-21 22:07:18,432 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 392 transitions, 9006 flow [2024-06-21 22:07:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:18,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:18,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:18,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:07:18,433 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:18,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2025829973, now seen corresponding path program 3 times [2024-06-21 22:07:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251911443] [2024-06-21 22:07:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:21,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251911443] [2024-06-21 22:07:21,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251911443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:21,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:21,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:21,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993371139] [2024-06-21 22:07:21,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:21,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:21,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:21,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:21,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 392 transitions, 9006 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:21,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:21,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:21,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:22,956 INFO L124 PetriNetUnfolderBase]: 2579/4176 cut-off events. [2024-06-21 22:07:22,956 INFO L125 PetriNetUnfolderBase]: For 757196/757196 co-relation queries the response was YES. [2024-06-21 22:07:22,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60622 conditions, 4176 events. 2579/4176 cut-off events. For 757196/757196 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24483 event pairs, 576 based on Foata normal form. 1/4170 useless extension candidates. Maximal degree in co-relation 60492. Up to 3895 conditions per place. [2024-06-21 22:07:23,009 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 386 selfloop transitions, 25 changer transitions 0/416 dead transitions. [2024-06-21 22:07:23,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 416 transitions, 10045 flow [2024-06-21 22:07:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 22:07:23,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-21 22:07:23,011 INFO L175 Difference]: Start difference. First operand has 276 places, 392 transitions, 9006 flow. Second operand 8 states and 131 transitions. [2024-06-21 22:07:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 416 transitions, 10045 flow [2024-06-21 22:07:24,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 416 transitions, 9922 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 22:07:24,094 INFO L231 Difference]: Finished difference. Result has 275 places, 395 transitions, 9096 flow [2024-06-21 22:07:24,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9096, PETRI_PLACES=275, PETRI_TRANSITIONS=395} [2024-06-21 22:07:24,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-21 22:07:24,095 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 395 transitions, 9096 flow [2024-06-21 22:07:24,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:24,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:24,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:24,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:07:24,095 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:24,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1363115069, now seen corresponding path program 4 times [2024-06-21 22:07:24,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:24,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410076103] [2024-06-21 22:07:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:24,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:26,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:26,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410076103] [2024-06-21 22:07:26,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410076103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:26,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:26,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:26,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898801524] [2024-06-21 22:07:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:26,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:26,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:26,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:26,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:27,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:27,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 395 transitions, 9096 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:27,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:27,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:27,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:28,535 INFO L124 PetriNetUnfolderBase]: 2576/4172 cut-off events. [2024-06-21 22:07:28,535 INFO L125 PetriNetUnfolderBase]: For 773398/773398 co-relation queries the response was YES. [2024-06-21 22:07:28,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60900 conditions, 4172 events. 2576/4172 cut-off events. For 773398/773398 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24498 event pairs, 576 based on Foata normal form. 1/4166 useless extension candidates. Maximal degree in co-relation 60770. Up to 3873 conditions per place. [2024-06-21 22:07:28,585 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 372 selfloop transitions, 38 changer transitions 0/415 dead transitions. [2024-06-21 22:07:28,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 10125 flow [2024-06-21 22:07:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 22:07:28,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-21 22:07:28,587 INFO L175 Difference]: Start difference. First operand has 275 places, 395 transitions, 9096 flow. Second operand 8 states and 128 transitions. [2024-06-21 22:07:28,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 10125 flow [2024-06-21 22:07:29,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 415 transitions, 9965 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:29,526 INFO L231 Difference]: Finished difference. Result has 277 places, 398 transitions, 9181 flow [2024-06-21 22:07:29,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9181, PETRI_PLACES=277, PETRI_TRANSITIONS=398} [2024-06-21 22:07:29,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-21 22:07:29,527 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 398 transitions, 9181 flow [2024-06-21 22:07:29,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:29,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:29,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:29,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:07:29,527 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:29,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1356125300, now seen corresponding path program 3 times [2024-06-21 22:07:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:29,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781769320] [2024-06-21 22:07:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:29,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:32,055 INFO 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 22:07:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:32,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781769320] [2024-06-21 22:07:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781769320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:32,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:32,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:32,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973023627] [2024-06-21 22:07:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:32,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:32,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:32,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:32,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 398 transitions, 9181 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:32,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:32,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:32,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:34,140 INFO L124 PetriNetUnfolderBase]: 2650/4279 cut-off events. [2024-06-21 22:07:34,141 INFO L125 PetriNetUnfolderBase]: For 821639/821639 co-relation queries the response was YES. [2024-06-21 22:07:34,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63375 conditions, 4279 events. 2650/4279 cut-off events. For 821639/821639 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25162 event pairs, 566 based on Foata normal form. 6/4278 useless extension candidates. Maximal degree in co-relation 63244. Up to 3926 conditions per place. [2024-06-21 22:07:34,189 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 398 selfloop transitions, 45 changer transitions 0/448 dead transitions. [2024-06-21 22:07:34,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 448 transitions, 11086 flow [2024-06-21 22:07:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:07:34,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-21 22:07:34,191 INFO L175 Difference]: Start difference. First operand has 277 places, 398 transitions, 9181 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:07:34,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 448 transitions, 11086 flow [2024-06-21 22:07:35,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 448 transitions, 10894 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:35,183 INFO L231 Difference]: Finished difference. Result has 281 places, 416 transitions, 9685 flow [2024-06-21 22:07:35,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9685, PETRI_PLACES=281, PETRI_TRANSITIONS=416} [2024-06-21 22:07:35,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-21 22:07:35,184 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 416 transitions, 9685 flow [2024-06-21 22:07:35,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:35,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:35,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:07:35,185 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:35,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash -436352342, now seen corresponding path program 4 times [2024-06-21 22:07:35,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:35,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268642749] [2024-06-21 22:07:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:37,573 INFO 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 22:07:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268642749] [2024-06-21 22:07:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268642749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:37,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:37,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369984044] [2024-06-21 22:07:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:37,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:37,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:37,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 416 transitions, 9685 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:37,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:37,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:39,604 INFO L124 PetriNetUnfolderBase]: 2700/4354 cut-off events. [2024-06-21 22:07:39,605 INFO L125 PetriNetUnfolderBase]: For 852400/852400 co-relation queries the response was YES. [2024-06-21 22:07:39,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65024 conditions, 4354 events. 2700/4354 cut-off events. For 852400/852400 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 25545 event pairs, 451 based on Foata normal form. 5/4352 useless extension candidates. Maximal degree in co-relation 64891. Up to 3248 conditions per place. [2024-06-21 22:07:39,662 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 289 selfloop transitions, 169 changer transitions 0/463 dead transitions. [2024-06-21 22:07:39,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 463 transitions, 11290 flow [2024-06-21 22:07:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:07:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:07:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 22:07:39,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:07:39,665 INFO L175 Difference]: Start difference. First operand has 281 places, 416 transitions, 9685 flow. Second operand 10 states and 172 transitions. [2024-06-21 22:07:39,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 463 transitions, 11290 flow [2024-06-21 22:07:40,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 463 transitions, 11089 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:40,778 INFO L231 Difference]: Finished difference. Result has 288 places, 428 transitions, 10347 flow [2024-06-21 22:07:40,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10347, PETRI_PLACES=288, PETRI_TRANSITIONS=428} [2024-06-21 22:07:40,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 22:07:40,779 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 428 transitions, 10347 flow [2024-06-21 22:07:40,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:40,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:40,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:40,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:07:40,779 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:40,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1758241951, now seen corresponding path program 2 times [2024-06-21 22:07:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:40,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618348726] [2024-06-21 22:07:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:43,582 INFO 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 22:07:43,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618348726] [2024-06-21 22:07:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618348726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:43,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:43,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:43,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117426303] [2024-06-21 22:07:43,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:43,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:43,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:43,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 428 transitions, 10347 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:43,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:45,630 INFO L124 PetriNetUnfolderBase]: 2710/4368 cut-off events. [2024-06-21 22:07:45,630 INFO L125 PetriNetUnfolderBase]: For 887136/887136 co-relation queries the response was YES. [2024-06-21 22:07:45,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67129 conditions, 4368 events. 2710/4368 cut-off events. For 887136/887136 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25643 event pairs, 577 based on Foata normal form. 2/4363 useless extension candidates. Maximal degree in co-relation 66993. Up to 4074 conditions per place. [2024-06-21 22:07:45,687 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 419 selfloop transitions, 30 changer transitions 0/454 dead transitions. [2024-06-21 22:07:45,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 454 transitions, 11457 flow [2024-06-21 22:07:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 22:07:45,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-21 22:07:45,689 INFO L175 Difference]: Start difference. First operand has 288 places, 428 transitions, 10347 flow. Second operand 9 states and 145 transitions. [2024-06-21 22:07:45,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 454 transitions, 11457 flow [2024-06-21 22:07:46,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 454 transitions, 11350 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:46,882 INFO L231 Difference]: Finished difference. Result has 293 places, 432 transitions, 10459 flow [2024-06-21 22:07:46,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10240, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10459, PETRI_PLACES=293, PETRI_TRANSITIONS=432} [2024-06-21 22:07:46,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-21 22:07:46,883 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 432 transitions, 10459 flow [2024-06-21 22:07:46,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:46,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:46,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:46,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:07:46,883 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:46,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1052351004, now seen corresponding path program 5 times [2024-06-21 22:07:46,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:46,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514328562] [2024-06-21 22:07:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:46,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:49,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:49,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514328562] [2024-06-21 22:07:49,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514328562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:49,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:49,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:49,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659277360] [2024-06-21 22:07:49,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:49,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:49,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:49,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:49,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 432 transitions, 10459 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:49,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:49,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:49,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:52,366 INFO L124 PetriNetUnfolderBase]: 2840/4579 cut-off events. [2024-06-21 22:07:52,367 INFO L125 PetriNetUnfolderBase]: For 975589/975589 co-relation queries the response was YES. [2024-06-21 22:07:52,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71243 conditions, 4579 events. 2840/4579 cut-off events. For 975589/975589 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27287 event pairs, 354 based on Foata normal form. 4/4581 useless extension candidates. Maximal degree in co-relation 71105. Up to 3501 conditions per place. [2024-06-21 22:07:52,427 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 310 selfloop transitions, 186 changer transitions 0/501 dead transitions. [2024-06-21 22:07:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 501 transitions, 13147 flow [2024-06-21 22:07:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:07:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:07:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-21 22:07:52,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-21 22:07:52,428 INFO L175 Difference]: Start difference. First operand has 293 places, 432 transitions, 10459 flow. Second operand 12 states and 196 transitions. [2024-06-21 22:07:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 501 transitions, 13147 flow [2024-06-21 22:07:53,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 501 transitions, 12956 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:53,516 INFO L231 Difference]: Finished difference. Result has 301 places, 463 transitions, 11859 flow [2024-06-21 22:07:53,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10268, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11859, PETRI_PLACES=301, PETRI_TRANSITIONS=463} [2024-06-21 22:07:53,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-21 22:07:53,517 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 463 transitions, 11859 flow [2024-06-21 22:07:53,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:53,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:53,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:07:53,517 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:53,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 784489128, now seen corresponding path program 6 times [2024-06-21 22:07:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:53,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708752654] [2024-06-21 22:07:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:53,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:56,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:56,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708752654] [2024-06-21 22:07:56,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708752654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:56,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:56,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:56,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423658545] [2024-06-21 22:07:56,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:56,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:56,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:56,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:56,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:56,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:07:56,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 463 transitions, 11859 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:56,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:56,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:07:56,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:58,111 INFO L124 PetriNetUnfolderBase]: 2828/4556 cut-off events. [2024-06-21 22:07:58,112 INFO L125 PetriNetUnfolderBase]: For 1004053/1004053 co-relation queries the response was YES. [2024-06-21 22:07:58,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72954 conditions, 4556 events. 2828/4556 cut-off events. For 1004053/1004053 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26945 event pairs, 595 based on Foata normal form. 4/4558 useless extension candidates. Maximal degree in co-relation 72812. Up to 4306 conditions per place. [2024-06-21 22:07:58,170 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 451 selfloop transitions, 29 changer transitions 0/485 dead transitions. [2024-06-21 22:07:58,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 485 transitions, 12980 flow [2024-06-21 22:07:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:07:58,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-21 22:07:58,172 INFO L175 Difference]: Start difference. First operand has 301 places, 463 transitions, 11859 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:07:58,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 485 transitions, 12980 flow [2024-06-21 22:07:59,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 485 transitions, 12773 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:59,547 INFO L231 Difference]: Finished difference. Result has 307 places, 464 transitions, 11772 flow [2024-06-21 22:07:59,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11652, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11772, PETRI_PLACES=307, PETRI_TRANSITIONS=464} [2024-06-21 22:07:59,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 22:07:59,548 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 464 transitions, 11772 flow [2024-06-21 22:07:59,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:59,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:59,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:59,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:07:59,549 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:59,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash 778948033, now seen corresponding path program 3 times [2024-06-21 22:07:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:59,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770399273] [2024-06-21 22:07:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:02,378 INFO 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 22:08:02,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:02,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770399273] [2024-06-21 22:08:02,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770399273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:02,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:02,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:02,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069015812] [2024-06-21 22:08:02,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:02,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:02,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:02,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:02,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 464 transitions, 11772 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:02,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:02,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:02,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:04,170 INFO L124 PetriNetUnfolderBase]: 2833/4563 cut-off events. [2024-06-21 22:08:04,170 INFO L125 PetriNetUnfolderBase]: For 1014213/1014213 co-relation queries the response was YES. [2024-06-21 22:08:04,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73090 conditions, 4563 events. 2833/4563 cut-off events. For 1014213/1014213 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27017 event pairs, 588 based on Foata normal form. 1/4557 useless extension candidates. Maximal degree in co-relation 72944. Up to 4227 conditions per place. [2024-06-21 22:08:04,235 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 50 changer transitions 0/487 dead transitions. [2024-06-21 22:08:04,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 487 transitions, 12928 flow [2024-06-21 22:08:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:08:04,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-21 22:08:04,237 INFO L175 Difference]: Start difference. First operand has 307 places, 464 transitions, 11772 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:08:04,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 487 transitions, 12928 flow [2024-06-21 22:08:05,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 487 transitions, 12868 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:05,742 INFO L231 Difference]: Finished difference. Result has 311 places, 469 transitions, 11984 flow [2024-06-21 22:08:05,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11712, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11984, PETRI_PLACES=311, PETRI_TRANSITIONS=469} [2024-06-21 22:08:05,743 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-21 22:08:05,743 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 469 transitions, 11984 flow [2024-06-21 22:08:05,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:05,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:05,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:05,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:08:05,745 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:05,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:05,746 INFO L85 PathProgramCache]: Analyzing trace with hash 770673978, now seen corresponding path program 7 times [2024-06-21 22:08:05,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:05,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502399466] [2024-06-21 22:08:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:05,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:08,700 INFO 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 22:08:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:08,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502399466] [2024-06-21 22:08:08,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502399466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:08,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:08,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:08,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683863577] [2024-06-21 22:08:08,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:08,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:08,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:08,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:08,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 469 transitions, 11984 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:08,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:08,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:08,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:11,011 INFO L124 PetriNetUnfolderBase]: 2906/4678 cut-off events. [2024-06-21 22:08:11,012 INFO L125 PetriNetUnfolderBase]: For 1078205/1078205 co-relation queries the response was YES. [2024-06-21 22:08:11,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75806 conditions, 4678 events. 2906/4678 cut-off events. For 1078205/1078205 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27904 event pairs, 384 based on Foata normal form. 2/4673 useless extension candidates. Maximal degree in co-relation 75657. Up to 3555 conditions per place. [2024-06-21 22:08:11,078 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 311 selfloop transitions, 211 changer transitions 0/527 dead transitions. [2024-06-21 22:08:11,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 527 transitions, 14417 flow [2024-06-21 22:08:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 22:08:11,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 22:08:11,080 INFO L175 Difference]: Start difference. First operand has 311 places, 469 transitions, 11984 flow. Second operand 9 states and 158 transitions. [2024-06-21 22:08:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 527 transitions, 14417 flow [2024-06-21 22:08:12,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 527 transitions, 14253 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:12,775 INFO L231 Difference]: Finished difference. Result has 316 places, 499 transitions, 13414 flow [2024-06-21 22:08:12,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11820, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13414, PETRI_PLACES=316, PETRI_TRANSITIONS=499} [2024-06-21 22:08:12,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-21 22:08:12,776 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 499 transitions, 13414 flow [2024-06-21 22:08:12,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:12,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:12,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:12,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:08:12,776 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 778961208, now seen corresponding path program 8 times [2024-06-21 22:08:12,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:12,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19595110] [2024-06-21 22:08:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:12,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:15,577 INFO 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 22:08:15,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:15,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19595110] [2024-06-21 22:08:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19595110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:15,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917937139] [2024-06-21 22:08:15,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:15,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:15,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:15,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 499 transitions, 13414 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:15,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:15,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:15,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:17,956 INFO L124 PetriNetUnfolderBase]: 2975/4774 cut-off events. [2024-06-21 22:08:17,956 INFO L125 PetriNetUnfolderBase]: For 1145150/1145150 co-relation queries the response was YES. [2024-06-21 22:08:17,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79843 conditions, 4774 events. 2975/4774 cut-off events. For 1145150/1145150 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28340 event pairs, 456 based on Foata normal form. 4/4776 useless extension candidates. Maximal degree in co-relation 79692. Up to 3764 conditions per place. [2024-06-21 22:08:18,031 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 352 selfloop transitions, 186 changer transitions 0/543 dead transitions. [2024-06-21 22:08:18,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 543 transitions, 15352 flow [2024-06-21 22:08:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:08:18,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 22:08:18,032 INFO L175 Difference]: Start difference. First operand has 316 places, 499 transitions, 13414 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:08:18,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 543 transitions, 15352 flow [2024-06-21 22:08:19,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 543 transitions, 15205 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:19,815 INFO L231 Difference]: Finished difference. Result has 323 places, 514 transitions, 14349 flow [2024-06-21 22:08:19,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13267, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14349, PETRI_PLACES=323, PETRI_TRANSITIONS=514} [2024-06-21 22:08:19,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-21 22:08:19,816 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 514 transitions, 14349 flow [2024-06-21 22:08:19,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:19,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:19,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:19,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:08:19,817 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:19,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1038268789, now seen corresponding path program 4 times [2024-06-21 22:08:19,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:19,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748415266] [2024-06-21 22:08:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:19,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748415266] [2024-06-21 22:08:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748415266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:23,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282067393] [2024-06-21 22:08:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:23,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:23,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:23,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 514 transitions, 14349 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:23,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:23,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:23,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:25,421 INFO L124 PetriNetUnfolderBase]: 2985/4786 cut-off events. [2024-06-21 22:08:25,421 INFO L125 PetriNetUnfolderBase]: For 1195131/1195131 co-relation queries the response was YES. [2024-06-21 22:08:25,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82187 conditions, 4786 events. 2985/4786 cut-off events. For 1195131/1195131 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28462 event pairs, 590 based on Foata normal form. 2/4781 useless extension candidates. Maximal degree in co-relation 82033. Up to 4422 conditions per place. [2024-06-21 22:08:25,491 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 474 selfloop transitions, 61 changer transitions 0/540 dead transitions. [2024-06-21 22:08:25,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 540 transitions, 15847 flow [2024-06-21 22:08:25,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:08:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:08:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 22:08:25,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744186046511628 [2024-06-21 22:08:25,493 INFO L175 Difference]: Start difference. First operand has 323 places, 514 transitions, 14349 flow. Second operand 10 states and 161 transitions. [2024-06-21 22:08:25,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 540 transitions, 15847 flow [2024-06-21 22:08:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 540 transitions, 15682 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:27,419 INFO L231 Difference]: Finished difference. Result has 328 places, 519 transitions, 14555 flow [2024-06-21 22:08:27,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14184, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14555, PETRI_PLACES=328, PETRI_TRANSITIONS=519} [2024-06-21 22:08:27,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-21 22:08:27,420 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 519 transitions, 14555 flow [2024-06-21 22:08:27,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:27,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:27,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:27,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:08:27,420 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:27,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash 779244703, now seen corresponding path program 5 times [2024-06-21 22:08:27,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:27,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186978904] [2024-06-21 22:08:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:27,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:30,483 INFO 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 22:08:30,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:30,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186978904] [2024-06-21 22:08:30,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186978904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408674218] [2024-06-21 22:08:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:30,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:30,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:30,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:30,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:30,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 519 transitions, 14555 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:30,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:30,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:32,712 INFO L124 PetriNetUnfolderBase]: 2982/4777 cut-off events. [2024-06-21 22:08:32,712 INFO L125 PetriNetUnfolderBase]: For 1219043/1219043 co-relation queries the response was YES. [2024-06-21 22:08:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82682 conditions, 4777 events. 2982/4777 cut-off events. For 1219043/1219043 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28419 event pairs, 588 based on Foata normal form. 1/4771 useless extension candidates. Maximal degree in co-relation 82528. Up to 4319 conditions per place. [2024-06-21 22:08:32,784 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 445 selfloop transitions, 106 changer transitions 0/556 dead transitions. [2024-06-21 22:08:32,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 556 transitions, 16214 flow [2024-06-21 22:08:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:08:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:08:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 22:08:32,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-21 22:08:32,785 INFO L175 Difference]: Start difference. First operand has 328 places, 519 transitions, 14555 flow. Second operand 10 states and 163 transitions. [2024-06-21 22:08:32,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 556 transitions, 16214 flow [2024-06-21 22:08:34,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 556 transitions, 15897 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:34,851 INFO L231 Difference]: Finished difference. Result has 335 places, 532 transitions, 14890 flow [2024-06-21 22:08:34,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14288, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14890, PETRI_PLACES=335, PETRI_TRANSITIONS=532} [2024-06-21 22:08:34,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-21 22:08:34,852 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 532 transitions, 14890 flow [2024-06-21 22:08:34,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:34,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:34,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:08:34,852 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:34,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash 770679558, now seen corresponding path program 9 times [2024-06-21 22:08:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118898832] [2024-06-21 22:08:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:37,579 INFO 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 22:08:37,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:37,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118898832] [2024-06-21 22:08:37,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118898832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:37,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:37,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:37,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023468695] [2024-06-21 22:08:37,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:37,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:37,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:37,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 532 transitions, 14890 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:37,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:37,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:37,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:39,840 INFO L124 PetriNetUnfolderBase]: 2991/4800 cut-off events. [2024-06-21 22:08:39,840 INFO L125 PetriNetUnfolderBase]: For 1243418/1243418 co-relation queries the response was YES. [2024-06-21 22:08:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83535 conditions, 4800 events. 2991/4800 cut-off events. For 1243418/1243418 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28533 event pairs, 587 based on Foata normal form. 5/4798 useless extension candidates. Maximal degree in co-relation 83377. Up to 4374 conditions per place. [2024-06-21 22:08:39,916 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 102 changer transitions 0/560 dead transitions. [2024-06-21 22:08:39,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 560 transitions, 16578 flow [2024-06-21 22:08:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:08:39,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-21 22:08:39,917 INFO L175 Difference]: Start difference. First operand has 335 places, 532 transitions, 14890 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:08:39,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 560 transitions, 16578 flow [2024-06-21 22:08:42,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 560 transitions, 16336 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:42,131 INFO L231 Difference]: Finished difference. Result has 341 places, 539 transitions, 15200 flow [2024-06-21 22:08:42,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14664, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15200, PETRI_PLACES=341, PETRI_TRANSITIONS=539} [2024-06-21 22:08:42,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-21 22:08:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 539 transitions, 15200 flow [2024-06-21 22:08:42,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:42,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:42,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:42,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:08:42,132 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:42,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash 778948188, now seen corresponding path program 10 times [2024-06-21 22:08:42,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:42,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378595109] [2024-06-21 22:08:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:42,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:45,666 INFO 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 22:08:45,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:45,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378595109] [2024-06-21 22:08:45,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378595109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:45,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677922551] [2024-06-21 22:08:45,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:45,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:45,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:45,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:45,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 539 transitions, 15200 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:45,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:45,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:45,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:47,870 INFO L124 PetriNetUnfolderBase]: 3005/4823 cut-off events. [2024-06-21 22:08:47,871 INFO L125 PetriNetUnfolderBase]: For 1269309/1269309 co-relation queries the response was YES. [2024-06-21 22:08:47,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84172 conditions, 4823 events. 3005/4823 cut-off events. For 1269309/1269309 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28768 event pairs, 586 based on Foata normal form. 2/4818 useless extension candidates. Maximal degree in co-relation 84011. Up to 4354 conditions per place. [2024-06-21 22:08:47,941 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 451 selfloop transitions, 122 changer transitions 0/578 dead transitions. [2024-06-21 22:08:47,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 578 transitions, 17010 flow [2024-06-21 22:08:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 22:08:47,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-21 22:08:47,942 INFO L175 Difference]: Start difference. First operand has 341 places, 539 transitions, 15200 flow. Second operand 9 states and 148 transitions. [2024-06-21 22:08:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 578 transitions, 17010 flow [2024-06-21 22:08:50,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 578 transitions, 16657 flow, removed 110 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:50,022 INFO L231 Difference]: Finished difference. Result has 347 places, 561 transitions, 15843 flow [2024-06-21 22:08:50,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14847, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15843, PETRI_PLACES=347, PETRI_TRANSITIONS=561} [2024-06-21 22:08:50,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-21 22:08:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 561 transitions, 15843 flow [2024-06-21 22:08:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:50,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:50,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:08:50,024 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:50,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 347923517, now seen corresponding path program 1 times [2024-06-21 22:08:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635100008] [2024-06-21 22:08:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:53,456 INFO 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 22:08:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635100008] [2024-06-21 22:08:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635100008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:53,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:53,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:53,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119167443] [2024-06-21 22:08:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:53,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:08:53,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 561 transitions, 15843 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:53,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:53,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:08:53,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:56,230 INFO L124 PetriNetUnfolderBase]: 3059/4957 cut-off events. [2024-06-21 22:08:56,231 INFO L125 PetriNetUnfolderBase]: For 1407338/1407338 co-relation queries the response was YES. [2024-06-21 22:08:56,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87532 conditions, 4957 events. 3059/4957 cut-off events. For 1407338/1407338 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30284 event pairs, 942 based on Foata normal form. 62/5017 useless extension candidates. Maximal degree in co-relation 87367. Up to 4407 conditions per place. [2024-06-21 22:08:56,313 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 553 selfloop transitions, 41 changer transitions 0/599 dead transitions. [2024-06-21 22:08:56,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 599 transitions, 17868 flow [2024-06-21 22:08:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:08:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:08:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 22:08:56,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-21 22:08:56,314 INFO L175 Difference]: Start difference. First operand has 347 places, 561 transitions, 15843 flow. Second operand 10 states and 156 transitions. [2024-06-21 22:08:56,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 599 transitions, 17868 flow [2024-06-21 22:08:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 599 transitions, 17554 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:59,032 INFO L231 Difference]: Finished difference. Result has 355 places, 568 transitions, 15893 flow [2024-06-21 22:08:59,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15422, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15893, PETRI_PLACES=355, PETRI_TRANSITIONS=568} [2024-06-21 22:08:59,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 22:08:59,033 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 568 transitions, 15893 flow [2024-06-21 22:08:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:59,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:59,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:08:59,033 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:59,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:59,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2093494649, now seen corresponding path program 2 times [2024-06-21 22:08:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003304139] [2024-06-21 22:08:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:02,048 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 22:09:02,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:02,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003304139] [2024-06-21 22:09:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003304139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:02,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:02,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:02,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716931323] [2024-06-21 22:09:02,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:02,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:02,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:02,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:02,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 568 transitions, 15893 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:02,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:02,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:02,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:04,418 INFO L124 PetriNetUnfolderBase]: 3060/4960 cut-off events. [2024-06-21 22:09:04,418 INFO L125 PetriNetUnfolderBase]: For 1400802/1400802 co-relation queries the response was YES. [2024-06-21 22:09:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87931 conditions, 4960 events. 3060/4960 cut-off events. For 1400802/1400802 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30376 event pairs, 942 based on Foata normal form. 2/4960 useless extension candidates. Maximal degree in co-relation 87762. Up to 4642 conditions per place. [2024-06-21 22:09:04,501 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 543 selfloop transitions, 44 changer transitions 0/592 dead transitions. [2024-06-21 22:09:04,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 592 transitions, 17769 flow [2024-06-21 22:09:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 22:09:04,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-21 22:09:04,502 INFO L175 Difference]: Start difference. First operand has 355 places, 568 transitions, 15893 flow. Second operand 9 states and 140 transitions. [2024-06-21 22:09:04,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 592 transitions, 17769 flow [2024-06-21 22:09:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 592 transitions, 17526 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-21 22:09:06,839 INFO L231 Difference]: Finished difference. Result has 361 places, 572 transitions, 16028 flow [2024-06-21 22:09:06,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15655, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16028, PETRI_PLACES=361, PETRI_TRANSITIONS=572} [2024-06-21 22:09:06,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-21 22:09:06,840 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 572 transitions, 16028 flow [2024-06-21 22:09:06,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:06,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:06,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:06,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:09:06,841 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:06,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash -763385833, now seen corresponding path program 3 times [2024-06-21 22:09:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348554274] [2024-06-21 22:09:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:09,934 INFO 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 22:09:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348554274] [2024-06-21 22:09:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348554274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:09,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:09,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:09,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686829537] [2024-06-21 22:09:09,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:09,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:09,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:09,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:09,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 572 transitions, 16028 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:09,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:09,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:12,369 INFO L124 PetriNetUnfolderBase]: 3054/4938 cut-off events. [2024-06-21 22:09:12,369 INFO L125 PetriNetUnfolderBase]: For 1393330/1393330 co-relation queries the response was YES. [2024-06-21 22:09:12,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87524 conditions, 4938 events. 3054/4938 cut-off events. For 1393330/1393330 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30019 event pairs, 610 based on Foata normal form. 3/4930 useless extension candidates. Maximal degree in co-relation 87354. Up to 4559 conditions per place. [2024-06-21 22:09:12,451 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 528 selfloop transitions, 56 changer transitions 0/589 dead transitions. [2024-06-21 22:09:12,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 589 transitions, 17475 flow [2024-06-21 22:09:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:09:12,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 22:09:12,453 INFO L175 Difference]: Start difference. First operand has 361 places, 572 transitions, 16028 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:09:12,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 589 transitions, 17475 flow [2024-06-21 22:09:14,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 589 transitions, 17331 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:14,950 INFO L231 Difference]: Finished difference. Result has 362 places, 572 transitions, 16007 flow [2024-06-21 22:09:14,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15884, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16007, PETRI_PLACES=362, PETRI_TRANSITIONS=572} [2024-06-21 22:09:14,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 22:09:14,951 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 572 transitions, 16007 flow [2024-06-21 22:09:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:14,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:14,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:14,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:09:14,952 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:14,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1047004496, now seen corresponding path program 1 times [2024-06-21 22:09:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:14,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784427366] [2024-06-21 22:09:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:18,431 INFO 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 22:09:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:18,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784427366] [2024-06-21 22:09:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784427366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:18,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:09:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994233910] [2024-06-21 22:09:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:09:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:09:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:09:18,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:18,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 572 transitions, 16007 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:18,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:18,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:18,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:21,140 INFO L124 PetriNetUnfolderBase]: 3067/4973 cut-off events. [2024-06-21 22:09:21,140 INFO L125 PetriNetUnfolderBase]: For 1404305/1404305 co-relation queries the response was YES. [2024-06-21 22:09:21,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87828 conditions, 4973 events. 3067/4973 cut-off events. For 1404305/1404305 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30503 event pairs, 659 based on Foata normal form. 2/4973 useless extension candidates. Maximal degree in co-relation 87658. Up to 4012 conditions per place. [2024-06-21 22:09:21,222 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 410 selfloop transitions, 189 changer transitions 0/604 dead transitions. [2024-06-21 22:09:21,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 604 transitions, 17631 flow [2024-06-21 22:09:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:09:21,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-21 22:09:21,224 INFO L175 Difference]: Start difference. First operand has 362 places, 572 transitions, 16007 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:09:21,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 604 transitions, 17631 flow [2024-06-21 22:09:23,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 604 transitions, 17446 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:23,713 INFO L231 Difference]: Finished difference. Result has 365 places, 578 transitions, 16561 flow [2024-06-21 22:09:23,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15822, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16561, PETRI_PLACES=365, PETRI_TRANSITIONS=578} [2024-06-21 22:09:23,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 22:09:23,714 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 578 transitions, 16561 flow [2024-06-21 22:09:23,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:23,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:23,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:09:23,715 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:23,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1052576126, now seen corresponding path program 2 times [2024-06-21 22:09:23,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:23,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946738226] [2024-06-21 22:09:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:28,535 INFO 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 22:09:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946738226] [2024-06-21 22:09:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946738226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:09:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882826378] [2024-06-21 22:09:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:09:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:09:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:09:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:28,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 578 transitions, 16561 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:28,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:31,032 INFO L124 PetriNetUnfolderBase]: 3075/4992 cut-off events. [2024-06-21 22:09:31,032 INFO L125 PetriNetUnfolderBase]: For 1446388/1446388 co-relation queries the response was YES. [2024-06-21 22:09:31,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89398 conditions, 4992 events. 3075/4992 cut-off events. For 1446388/1446388 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30696 event pairs, 946 based on Foata normal form. 2/4992 useless extension candidates. Maximal degree in co-relation 89227. Up to 4647 conditions per place. [2024-06-21 22:09:31,114 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 561 selfloop transitions, 43 changer transitions 0/609 dead transitions. [2024-06-21 22:09:31,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 609 transitions, 18163 flow [2024-06-21 22:09:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 22:09:31,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-21 22:09:31,116 INFO L175 Difference]: Start difference. First operand has 365 places, 578 transitions, 16561 flow. Second operand 10 states and 158 transitions. [2024-06-21 22:09:31,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 609 transitions, 18163 flow [2024-06-21 22:09:33,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 609 transitions, 18103 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 22:09:33,753 INFO L231 Difference]: Finished difference. Result has 372 places, 582 transitions, 16758 flow [2024-06-21 22:09:33,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16501, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16758, PETRI_PLACES=372, PETRI_TRANSITIONS=582} [2024-06-21 22:09:33,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 22:09:33,754 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 582 transitions, 16758 flow [2024-06-21 22:09:33,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:33,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:33,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:09:33,755 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:33,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1052366876, now seen corresponding path program 3 times [2024-06-21 22:09:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:33,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754091036] [2024-06-21 22:09:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:37,187 INFO 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 22:09:37,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:37,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754091036] [2024-06-21 22:09:37,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754091036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:37,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:37,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:09:37,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46123293] [2024-06-21 22:09:37,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:37,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:09:37,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:09:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:09:37,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:37,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 582 transitions, 16758 flow. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:37,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:37,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:39,910 INFO L124 PetriNetUnfolderBase]: 3070/4974 cut-off events. [2024-06-21 22:09:39,910 INFO L125 PetriNetUnfolderBase]: For 1459147/1459147 co-relation queries the response was YES. [2024-06-21 22:09:39,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89712 conditions, 4974 events. 3070/4974 cut-off events. For 1459147/1459147 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30388 event pairs, 749 based on Foata normal form. 2/4974 useless extension candidates. Maximal degree in co-relation 89538. Up to 4044 conditions per place. [2024-06-21 22:09:39,988 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 429 selfloop transitions, 175 changer transitions 0/609 dead transitions. [2024-06-21 22:09:39,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 609 transitions, 18229 flow [2024-06-21 22:09:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 22:09:39,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-21 22:09:39,989 INFO L175 Difference]: Start difference. First operand has 372 places, 582 transitions, 16758 flow. Second operand 10 states and 162 transitions. [2024-06-21 22:09:39,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 609 transitions, 18229 flow [2024-06-21 22:09:42,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 609 transitions, 18152 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:42,488 INFO L231 Difference]: Finished difference. Result has 376 places, 582 transitions, 17036 flow [2024-06-21 22:09:42,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16681, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17036, PETRI_PLACES=376, PETRI_TRANSITIONS=582} [2024-06-21 22:09:42,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-21 22:09:42,489 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 582 transitions, 17036 flow [2024-06-21 22:09:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:42,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:42,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:09:42,490 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:42,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 784973720, now seen corresponding path program 4 times [2024-06-21 22:09:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414733843] [2024-06-21 22:09:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:46,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:46,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414733843] [2024-06-21 22:09:46,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414733843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:46,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:46,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:09:46,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741749137] [2024-06-21 22:09:46,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:46,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:09:46,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:09:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:09:46,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:46,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 582 transitions, 17036 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:46,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:46,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:46,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:48,875 INFO L124 PetriNetUnfolderBase]: 3065/4968 cut-off events. [2024-06-21 22:09:48,875 INFO L125 PetriNetUnfolderBase]: For 1502142/1502142 co-relation queries the response was YES. [2024-06-21 22:09:48,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90497 conditions, 4968 events. 3065/4968 cut-off events. For 1502142/1502142 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30357 event pairs, 934 based on Foata normal form. 2/4968 useless extension candidates. Maximal degree in co-relation 90322. Up to 4701 conditions per place. [2024-06-21 22:09:48,950 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 569 selfloop transitions, 28 changer transitions 0/602 dead transitions. [2024-06-21 22:09:48,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 602 transitions, 18329 flow [2024-06-21 22:09:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 22:09:48,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-21 22:09:48,952 INFO L175 Difference]: Start difference. First operand has 376 places, 582 transitions, 17036 flow. Second operand 9 states and 137 transitions. [2024-06-21 22:09:48,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 602 transitions, 18329 flow [2024-06-21 22:09:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 602 transitions, 18109 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:51,263 INFO L231 Difference]: Finished difference. Result has 379 places, 584 transitions, 16933 flow [2024-06-21 22:09:51,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16816, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16933, PETRI_PLACES=379, PETRI_TRANSITIONS=584} [2024-06-21 22:09:51,264 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 22:09:51,264 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 584 transitions, 16933 flow [2024-06-21 22:09:51,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:51,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:51,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:09:51,264 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:51,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash 970407619, now seen corresponding path program 1 times [2024-06-21 22:09:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347369883] [2024-06-21 22:09:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:54,418 INFO 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 22:09:54,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347369883] [2024-06-21 22:09:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347369883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:54,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:54,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:09:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495011110] [2024-06-21 22:09:54,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:54,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:09:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:09:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:09:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:09:54,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 584 transitions, 16933 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:54,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:54,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:09:54,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:57,275 INFO L124 PetriNetUnfolderBase]: 3300/5343 cut-off events. [2024-06-21 22:09:57,275 INFO L125 PetriNetUnfolderBase]: For 1631496/1631496 co-relation queries the response was YES. [2024-06-21 22:09:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95938 conditions, 5343 events. 3300/5343 cut-off events. For 1631496/1631496 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32747 event pairs, 599 based on Foata normal form. 8/5349 useless extension candidates. Maximal degree in co-relation 95762. Up to 4732 conditions per place. [2024-06-21 22:09:57,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 590 selfloop transitions, 81 changer transitions 0/676 dead transitions. [2024-06-21 22:09:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 676 transitions, 20170 flow [2024-06-21 22:09:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 22:09:57,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 22:09:57,369 INFO L175 Difference]: Start difference. First operand has 379 places, 584 transitions, 16933 flow. Second operand 10 states and 192 transitions. [2024-06-21 22:09:57,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 676 transitions, 20170 flow [2024-06-21 22:10:00,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 676 transitions, 20079 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 22:10:00,471 INFO L231 Difference]: Finished difference. Result has 385 places, 617 transitions, 18336 flow [2024-06-21 22:10:00,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16844, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18336, PETRI_PLACES=385, PETRI_TRANSITIONS=617} [2024-06-21 22:10:00,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 22:10:00,472 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 617 transitions, 18336 flow [2024-06-21 22:10:00,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:00,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:00,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:00,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:10:00,473 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:00,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1490654163, now seen corresponding path program 2 times [2024-06-21 22:10:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:00,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933169544] [2024-06-21 22:10:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:00,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933169544] [2024-06-21 22:10:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933169544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:03,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:03,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176140682] [2024-06-21 22:10:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:03,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:03,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:10:03,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 617 transitions, 18336 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:03,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:03,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:10:03,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:06,476 INFO L124 PetriNetUnfolderBase]: 3374/5455 cut-off events. [2024-06-21 22:10:06,476 INFO L125 PetriNetUnfolderBase]: For 1664471/1664471 co-relation queries the response was YES. [2024-06-21 22:10:06,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98391 conditions, 5455 events. 3374/5455 cut-off events. For 1664471/1664471 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33508 event pairs, 637 based on Foata normal form. 8/5461 useless extension candidates. Maximal degree in co-relation 98211. Up to 4954 conditions per place. [2024-06-21 22:10:06,562 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 590 selfloop transitions, 80 changer transitions 0/675 dead transitions. [2024-06-21 22:10:06,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 675 transitions, 20462 flow [2024-06-21 22:10:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 22:10:06,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-21 22:10:06,564 INFO L175 Difference]: Start difference. First operand has 385 places, 617 transitions, 18336 flow. Second operand 10 states and 186 transitions. [2024-06-21 22:10:06,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 675 transitions, 20462 flow [2024-06-21 22:10:09,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 675 transitions, 20357 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 22:10:09,158 INFO L231 Difference]: Finished difference. Result has 394 places, 625 transitions, 18716 flow [2024-06-21 22:10:09,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18241, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18716, PETRI_PLACES=394, PETRI_TRANSITIONS=625} [2024-06-21 22:10:09,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-21 22:10:09,158 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 625 transitions, 18716 flow [2024-06-21 22:10:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:09,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:09,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:10:09,159 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:09,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:09,159 INFO L85 PathProgramCache]: Analyzing trace with hash 435711697, now seen corresponding path program 1 times [2024-06-21 22:10:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59574724] [2024-06-21 22:10:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:12,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59574724] [2024-06-21 22:10:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59574724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:12,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:12,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788327185] [2024-06-21 22:10:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:12,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:12,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:12,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:10:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 625 transitions, 18716 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:10:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:14,994 INFO L124 PetriNetUnfolderBase]: 3408/5509 cut-off events. [2024-06-21 22:10:14,995 INFO L125 PetriNetUnfolderBase]: For 1683017/1683017 co-relation queries the response was YES. [2024-06-21 22:10:15,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99767 conditions, 5509 events. 3408/5509 cut-off events. For 1683017/1683017 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33854 event pairs, 641 based on Foata normal form. 2/5509 useless extension candidates. Maximal degree in co-relation 99584. Up to 5088 conditions per place. [2024-06-21 22:10:15,093 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 608 selfloop transitions, 76 changer transitions 0/689 dead transitions. [2024-06-21 22:10:15,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 689 transitions, 21088 flow [2024-06-21 22:10:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 22:10:15,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-21 22:10:15,094 INFO L175 Difference]: Start difference. First operand has 394 places, 625 transitions, 18716 flow. Second operand 10 states and 182 transitions. [2024-06-21 22:10:15,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 689 transitions, 21088 flow [2024-06-21 22:10:18,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 689 transitions, 20936 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:10:18,402 INFO L231 Difference]: Finished difference. Result has 402 places, 643 transitions, 19443 flow [2024-06-21 22:10:18,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18565, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19443, PETRI_PLACES=402, PETRI_TRANSITIONS=643} [2024-06-21 22:10:18,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-21 22:10:18,403 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 643 transitions, 19443 flow [2024-06-21 22:10:18,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:18,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:18,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:18,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:10:18,403 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:18,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:18,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1977432797, now seen corresponding path program 1 times [2024-06-21 22:10:18,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:18,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272660341] [2024-06-21 22:10:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:18,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:21,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272660341] [2024-06-21 22:10:21,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272660341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:21,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:21,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:21,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43051052] [2024-06-21 22:10:21,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:21,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:21,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:21,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:10:21,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 643 transitions, 19443 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:10:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:24,496 INFO L124 PetriNetUnfolderBase]: 3476/5658 cut-off events. [2024-06-21 22:10:24,497 INFO L125 PetriNetUnfolderBase]: For 1730475/1730475 co-relation queries the response was YES. [2024-06-21 22:10:24,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102237 conditions, 5658 events. 3476/5658 cut-off events. For 1730475/1730475 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35148 event pairs, 691 based on Foata normal form. 1/5656 useless extension candidates. Maximal degree in co-relation 102050. Up to 5216 conditions per place. [2024-06-21 22:10:24,594 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 663 selfloop transitions, 49 changer transitions 0/717 dead transitions. [2024-06-21 22:10:24,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 717 transitions, 21968 flow [2024-06-21 22:10:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:10:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:10:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-21 22:10:24,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-21 22:10:24,596 INFO L175 Difference]: Start difference. First operand has 402 places, 643 transitions, 19443 flow. Second operand 12 states and 206 transitions. [2024-06-21 22:10:24,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 717 transitions, 21968 flow [2024-06-21 22:10:28,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 717 transitions, 21702 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:28,294 INFO L231 Difference]: Finished difference. Result has 414 places, 665 transitions, 20116 flow [2024-06-21 22:10:28,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19177, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20116, PETRI_PLACES=414, PETRI_TRANSITIONS=665} [2024-06-21 22:10:28,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-21 22:10:28,295 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 665 transitions, 20116 flow [2024-06-21 22:10:28,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:28,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:28,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:28,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:10:28,296 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:28,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash 34257875, now seen corresponding path program 3 times [2024-06-21 22:10:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810157466] [2024-06-21 22:10:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:28,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:31,823 INFO 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 22:10:31,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810157466] [2024-06-21 22:10:31,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810157466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:31,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:31,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466394483] [2024-06-21 22:10:31,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:31,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:31,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:31,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:10:31,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 665 transitions, 20116 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:31,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:31,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:10:31,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:34,910 INFO L124 PetriNetUnfolderBase]: 3458/5613 cut-off events. [2024-06-21 22:10:34,910 INFO L125 PetriNetUnfolderBase]: For 1747927/1747927 co-relation queries the response was YES. [2024-06-21 22:10:34,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101524 conditions, 5613 events. 3458/5613 cut-off events. For 1747927/1747927 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34722 event pairs, 628 based on Foata normal form. 8/5618 useless extension candidates. Maximal degree in co-relation 101333. Up to 5097 conditions per place. [2024-06-21 22:10:35,001 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 620 selfloop transitions, 82 changer transitions 0/707 dead transitions. [2024-06-21 22:10:35,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 707 transitions, 21962 flow [2024-06-21 22:10:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 22:10:35,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-21 22:10:35,003 INFO L175 Difference]: Start difference. First operand has 414 places, 665 transitions, 20116 flow. Second operand 10 states and 177 transitions. [2024-06-21 22:10:35,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 707 transitions, 21962 flow [2024-06-21 22:10:38,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 707 transitions, 21843 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:38,869 INFO L231 Difference]: Finished difference. Result has 423 places, 667 transitions, 20206 flow [2024-06-21 22:10:38,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19997, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20206, PETRI_PLACES=423, PETRI_TRANSITIONS=667} [2024-06-21 22:10:38,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-21 22:10:38,869 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 667 transitions, 20206 flow [2024-06-21 22:10:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:38,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:38,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:38,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:10:38,870 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:38,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash -928285513, now seen corresponding path program 2 times [2024-06-21 22:10:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442650957] [2024-06-21 22:10:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:41,918 INFO 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 22:10:41,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:41,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442650957] [2024-06-21 22:10:41,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442650957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:41,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:41,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:41,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175919505] [2024-06-21 22:10:41,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:41,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:41,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:41,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:10:41,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 667 transitions, 20206 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:41,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:41,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:10:41,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:44,632 INFO L124 PetriNetUnfolderBase]: 3519/5714 cut-off events. [2024-06-21 22:10:44,632 INFO L125 PetriNetUnfolderBase]: For 1787959/1787959 co-relation queries the response was YES. [2024-06-21 22:10:44,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103807 conditions, 5714 events. 3519/5714 cut-off events. For 1787959/1787959 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35527 event pairs, 689 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 103612. Up to 5357 conditions per place. [2024-06-21 22:10:44,732 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 679 selfloop transitions, 37 changer transitions 0/721 dead transitions. [2024-06-21 22:10:44,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 721 transitions, 22763 flow [2024-06-21 22:10:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 22:10:44,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-21 22:10:44,734 INFO L175 Difference]: Start difference. First operand has 423 places, 667 transitions, 20206 flow. Second operand 10 states and 167 transitions. [2024-06-21 22:10:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 721 transitions, 22763 flow [2024-06-21 22:10:48,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 721 transitions, 22649 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 22:10:48,523 INFO L231 Difference]: Finished difference. Result has 431 places, 686 transitions, 21001 flow [2024-06-21 22:10:48,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20092, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21001, PETRI_PLACES=431, PETRI_TRANSITIONS=686} [2024-06-21 22:10:48,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-21 22:10:48,523 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 686 transitions, 21001 flow [2024-06-21 22:10:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:48,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:48,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:48,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:10:48,524 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:48,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1757260665, now seen corresponding path program 2 times [2024-06-21 22:10:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:48,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2615319] [2024-06-21 22:10:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:48,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:51,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2615319] [2024-06-21 22:10:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2615319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848824301] [2024-06-21 22:10:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:51,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:10:51,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 686 transitions, 21001 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:51,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:51,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:10:51,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:54,419 INFO L124 PetriNetUnfolderBase]: 3568/5790 cut-off events. [2024-06-21 22:10:54,419 INFO L125 PetriNetUnfolderBase]: For 1834706/1834706 co-relation queries the response was YES. [2024-06-21 22:10:54,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105801 conditions, 5790 events. 3568/5790 cut-off events. For 1834706/1834706 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36019 event pairs, 703 based on Foata normal form. 1/5789 useless extension candidates. Maximal degree in co-relation 105603. Up to 5417 conditions per place. [2024-06-21 22:10:54,781 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 694 selfloop transitions, 40 changer transitions 0/739 dead transitions. [2024-06-21 22:10:54,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 739 transitions, 23453 flow [2024-06-21 22:10:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 22:10:54,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-21 22:10:54,783 INFO L175 Difference]: Start difference. First operand has 431 places, 686 transitions, 21001 flow. Second operand 10 states and 173 transitions. [2024-06-21 22:10:54,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 739 transitions, 23453 flow [2024-06-21 22:10:58,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 739 transitions, 23212 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-21 22:10:58,182 INFO L231 Difference]: Finished difference. Result has 439 places, 702 transitions, 21545 flow [2024-06-21 22:10:58,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20760, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21545, PETRI_PLACES=439, PETRI_TRANSITIONS=702} [2024-06-21 22:10:58,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-21 22:10:58,183 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 702 transitions, 21545 flow [2024-06-21 22:10:58,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:58,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:58,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:58,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:10:58,184 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:58,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -35222371, now seen corresponding path program 3 times [2024-06-21 22:10:58,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:58,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174947324] [2024-06-21 22:10:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:01,607 INFO 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 22:11:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:01,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174947324] [2024-06-21 22:11:01,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174947324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:01,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:01,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393353144] [2024-06-21 22:11:01,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:01,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:01,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:01,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:11:01,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 702 transitions, 21545 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:01,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:01,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:11:01,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:04,595 INFO L124 PetriNetUnfolderBase]: 3562/5782 cut-off events. [2024-06-21 22:11:04,595 INFO L125 PetriNetUnfolderBase]: For 1851342/1851342 co-relation queries the response was YES. [2024-06-21 22:11:04,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105806 conditions, 5782 events. 3562/5782 cut-off events. For 1851342/1851342 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35998 event pairs, 702 based on Foata normal form. 2/5782 useless extension candidates. Maximal degree in co-relation 105604. Up to 5430 conditions per place. [2024-06-21 22:11:04,696 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 693 selfloop transitions, 37 changer transitions 0/735 dead transitions. [2024-06-21 22:11:04,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 735 transitions, 23148 flow [2024-06-21 22:11:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 22:11:04,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-21 22:11:04,697 INFO L175 Difference]: Start difference. First operand has 439 places, 702 transitions, 21545 flow. Second operand 10 states and 168 transitions. [2024-06-21 22:11:04,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 735 transitions, 23148 flow [2024-06-21 22:11:08,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 735 transitions, 22924 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-21 22:11:08,289 INFO L231 Difference]: Finished difference. Result has 444 places, 702 transitions, 21401 flow [2024-06-21 22:11:08,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21321, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21401, PETRI_PLACES=444, PETRI_TRANSITIONS=702} [2024-06-21 22:11:08,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-21 22:11:08,290 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 702 transitions, 21401 flow [2024-06-21 22:11:08,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:08,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:11:08,291 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:08,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash -752809137, now seen corresponding path program 4 times [2024-06-21 22:11:08,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796465253] [2024-06-21 22:11:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:11,080 INFO 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 22:11:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796465253] [2024-06-21 22:11:11,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796465253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:11,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:11,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913692553] [2024-06-21 22:11:11,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:11,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:11:11,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 702 transitions, 21401 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:11,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:11,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:11:11,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:14,678 INFO L124 PetriNetUnfolderBase]: 3870/6259 cut-off events. [2024-06-21 22:11:14,678 INFO L125 PetriNetUnfolderBase]: For 2040538/2040538 co-relation queries the response was YES. [2024-06-21 22:11:14,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113414 conditions, 6259 events. 3870/6259 cut-off events. For 2040538/2040538 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 39239 event pairs, 718 based on Foata normal form. 8/6265 useless extension candidates. Maximal degree in co-relation 113211. Up to 5482 conditions per place. [2024-06-21 22:11:14,779 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 118 changer transitions 0/798 dead transitions. [2024-06-21 22:11:14,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 798 transitions, 25293 flow [2024-06-21 22:11:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 22:11:14,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 22:11:14,780 INFO L175 Difference]: Start difference. First operand has 444 places, 702 transitions, 21401 flow. Second operand 10 states and 192 transitions. [2024-06-21 22:11:14,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 798 transitions, 25293 flow [2024-06-21 22:11:18,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 798 transitions, 25220 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:18,454 INFO L231 Difference]: Finished difference. Result has 451 places, 740 transitions, 23383 flow [2024-06-21 22:11:18,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21328, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23383, PETRI_PLACES=451, PETRI_TRANSITIONS=740} [2024-06-21 22:11:18,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-21 22:11:18,455 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 740 transitions, 23383 flow [2024-06-21 22:11:18,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:18,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:18,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:18,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 22:11:18,455 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:18,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:18,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1718309751, now seen corresponding path program 5 times [2024-06-21 22:11:18,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:18,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436192670] [2024-06-21 22:11:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:18,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:22,048 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 22:11:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436192670] [2024-06-21 22:11:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436192670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:22,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:22,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157118820] [2024-06-21 22:11:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:22,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:22,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:22,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:11:22,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 740 transitions, 23383 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:22,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:22,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:11:22,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:25,658 INFO L124 PetriNetUnfolderBase]: 3852/6235 cut-off events. [2024-06-21 22:11:25,658 INFO L125 PetriNetUnfolderBase]: For 2045268/2045268 co-relation queries the response was YES. [2024-06-21 22:11:25,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113561 conditions, 6235 events. 3852/6235 cut-off events. For 2045268/2045268 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 39201 event pairs, 735 based on Foata normal form. 8/6241 useless extension candidates. Maximal degree in co-relation 113353. Up to 5612 conditions per place. [2024-06-21 22:11:25,759 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 110 changer transitions 0/790 dead transitions. [2024-06-21 22:11:25,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 790 transitions, 25398 flow [2024-06-21 22:11:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 22:11:25,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-21 22:11:25,761 INFO L175 Difference]: Start difference. First operand has 451 places, 740 transitions, 23383 flow. Second operand 10 states and 183 transitions. [2024-06-21 22:11:25,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 790 transitions, 25398 flow [2024-06-21 22:11:29,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 790 transitions, 25275 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 22:11:29,902 INFO L231 Difference]: Finished difference. Result has 459 places, 743 transitions, 23551 flow [2024-06-21 22:11:29,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=23260, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23551, PETRI_PLACES=459, PETRI_TRANSITIONS=743} [2024-06-21 22:11:29,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-21 22:11:29,903 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 743 transitions, 23551 flow [2024-06-21 22:11:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:29,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:29,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 22:11:29,903 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:29,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 109798637, now seen corresponding path program 6 times [2024-06-21 22:11:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:29,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352310015] [2024-06-21 22:11:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:32,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:32,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352310015] [2024-06-21 22:11:32,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352310015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:32,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:32,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230523346] [2024-06-21 22:11:32,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:32,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:32,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:32,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:11:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 743 transitions, 23551 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:11:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:36,450 INFO L124 PetriNetUnfolderBase]: 4020/6501 cut-off events. [2024-06-21 22:11:36,451 INFO L125 PetriNetUnfolderBase]: For 2140571/2140571 co-relation queries the response was YES. [2024-06-21 22:11:36,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117741 conditions, 6501 events. 4020/6501 cut-off events. For 2140571/2140571 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 41014 event pairs, 571 based on Foata normal form. 8/6507 useless extension candidates. Maximal degree in co-relation 117531. Up to 5108 conditions per place. [2024-06-21 22:11:36,635 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 658 selfloop transitions, 144 changer transitions 0/807 dead transitions. [2024-06-21 22:11:36,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 807 transitions, 26332 flow [2024-06-21 22:11:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 22:11:36,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-21 22:11:36,636 INFO L175 Difference]: Start difference. First operand has 459 places, 743 transitions, 23551 flow. Second operand 10 states and 187 transitions. [2024-06-21 22:11:36,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 807 transitions, 26332 flow [2024-06-21 22:11:41,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 807 transitions, 26107 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:41,615 INFO L231 Difference]: Finished difference. Result has 464 places, 755 transitions, 24282 flow [2024-06-21 22:11:41,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=23326, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24282, PETRI_PLACES=464, PETRI_TRANSITIONS=755} [2024-06-21 22:11:41,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-21 22:11:41,618 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 755 transitions, 24282 flow [2024-06-21 22:11:41,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:41,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:41,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 22:11:41,618 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:41,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:41,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1912116747, now seen corresponding path program 3 times [2024-06-21 22:11:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:41,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140617632] [2024-06-21 22:11:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:44,569 INFO 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 22:11:44,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:44,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140617632] [2024-06-21 22:11:44,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140617632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:44,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:44,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742039689] [2024-06-21 22:11:44,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:44,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:44,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:44,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:44,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:11:44,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 755 transitions, 24282 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:44,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:44,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:11:44,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:48,724 INFO L124 PetriNetUnfolderBase]: 4137/6701 cut-off events. [2024-06-21 22:11:48,724 INFO L125 PetriNetUnfolderBase]: For 2187045/2187045 co-relation queries the response was YES. [2024-06-21 22:11:48,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122739 conditions, 6701 events. 4137/6701 cut-off events. For 2187045/2187045 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42801 event pairs, 727 based on Foata normal form. 1/6700 useless extension candidates. Maximal degree in co-relation 122526. Up to 5111 conditions per place. [2024-06-21 22:11:48,835 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 544 selfloop transitions, 299 changer transitions 0/848 dead transitions. [2024-06-21 22:11:48,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 848 transitions, 27967 flow [2024-06-21 22:11:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:11:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:11:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-21 22:11:48,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 22:11:48,837 INFO L175 Difference]: Start difference. First operand has 464 places, 755 transitions, 24282 flow. Second operand 12 states and 216 transitions. [2024-06-21 22:11:48,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 848 transitions, 27967 flow [2024-06-21 22:11:54,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 848 transitions, 27746 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:11:54,103 INFO L231 Difference]: Finished difference. Result has 473 places, 797 transitions, 26609 flow [2024-06-21 22:11:54,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24061, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26609, PETRI_PLACES=473, PETRI_TRANSITIONS=797} [2024-06-21 22:11:54,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-21 22:11:54,117 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 797 transitions, 26609 flow [2024-06-21 22:11:54,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:54,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:54,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:54,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 22:11:54,117 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:54,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash 736495599, now seen corresponding path program 4 times [2024-06-21 22:11:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:54,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797828089] [2024-06-21 22:11:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:58,070 INFO 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 22:11:58,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:58,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797828089] [2024-06-21 22:11:58,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797828089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:58,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:58,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:11:58,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008804813] [2024-06-21 22:11:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:58,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:11:58,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:11:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:11:58,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:11:58,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 797 transitions, 26609 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:58,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:58,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:11:58,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:01,811 INFO L124 PetriNetUnfolderBase]: 4175/6763 cut-off events. [2024-06-21 22:12:01,812 INFO L125 PetriNetUnfolderBase]: For 2279480/2279480 co-relation queries the response was YES. [2024-06-21 22:12:01,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125524 conditions, 6763 events. 4175/6763 cut-off events. For 2279480/2279480 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 43258 event pairs, 857 based on Foata normal form. 10/6771 useless extension candidates. Maximal degree in co-relation 125308. Up to 6269 conditions per place. [2024-06-21 22:12:01,925 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 746 selfloop transitions, 107 changer transitions 0/858 dead transitions. [2024-06-21 22:12:01,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 858 transitions, 29171 flow [2024-06-21 22:12:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:12:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:12:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 22:12:01,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-21 22:12:01,927 INFO L175 Difference]: Start difference. First operand has 473 places, 797 transitions, 26609 flow. Second operand 10 states and 182 transitions. [2024-06-21 22:12:01,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 858 transitions, 29171 flow [2024-06-21 22:12:07,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 858 transitions, 29041 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 22:12:07,591 INFO L231 Difference]: Finished difference. Result has 481 places, 818 transitions, 27392 flow [2024-06-21 22:12:07,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26479, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27392, PETRI_PLACES=481, PETRI_TRANSITIONS=818} [2024-06-21 22:12:07,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-21 22:12:07,592 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 818 transitions, 27392 flow [2024-06-21 22:12:07,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:07,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:07,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:12:07,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 22:12:07,593 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:07,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1757653745, now seen corresponding path program 1 times [2024-06-21 22:12:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899282646] [2024-06-21 22:12:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:11,026 INFO 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 22:12:11,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:11,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899282646] [2024-06-21 22:12:11,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899282646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:11,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:11,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:12:11,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999487867] [2024-06-21 22:12:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:11,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:12:11,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:12:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:12:11,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 22:12:11,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 818 transitions, 27392 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:11,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:11,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 22:12:11,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand